{"title":"Howie Glatter","description":"\u003cp\u003e\u003cstrong data-start=\"138\" data-end=\"179\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eHowie Glatter\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e is renowned for premium laser collimators and alignment accessories used by amateur and professional astronomers. Known for exceptional accuracy and build quality, Howie Glatter tools ensure precise optical alignment for optimal telescope performance.\u003c\/p\u003e","products":[{"product_id":"howie-glatter-parallizer-t-adapter-ea20-205t","title":"Howie Glatter Parallizer T-Adapter (EA20-205T)","description":"\u003ch2\u003eHowie Glatter Parallizer T-Adapter\u003c\/h2\u003e\n\u003cp\u003eT-adapter with Howie Glatter’s Parallizer Patent alignment feature allows your image train to stay parallel\u003cbr\u003e\u003cbr\u003eThere is a misconception that the problem of the cylindrical slip-fit system we use for eyepieces and other optical accessories is centering. There are adapters and holders on the market that are advertised as “centering” or “self-centering”, but even if an accessory is pushed off-center a millimeter or more by clamping, that will not introduce a significant problem if the accessory and holder axis remain parallel. This is true even with a laser collimator. In contrast, angular misalignment between the accessory and the drawtube axis of even a few arc minutes can be detrimental, especially for collimation tools and camera adapters. In short, centering is nice, but parallelism is golden!\u003cbr\u003eThe Parallizer™ patented design insures parallel alignment with the drawtube axis of optical accesories such as eyepieces, camera adapters, and collimation tools. The Parallizer’s unique, patented alignment feature assures that the drawtube and accessory axis will always be dead parallel.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eUseful for aligning the returning beam on collimator face.\u003cbr\u003e\u003cbr\u003eRemovable diffractive optical element for use in Glatter Holographic Collimators.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHowie Glatter Parallizer T-Adapter \u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv class=\"entry-content\"\u003e\n\u003cp\u003eHowie Glatter Limited Lifetime Warranty\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":43125733327077,"sku":"HG-EA20-205T","price":126.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/howie-glatter-parallizer-t-adapter-ea20-205t-astronomy-plus_8fb11e3c-4d22-4601-a2ee-2f48e9f1a716.png?v=1690484348"},{"product_id":"howie-glatter-parallizer-2-1-25-adapter-ea20-205p","title":"Howie Glatter Parallizer 2\"-1.25\" Adapter (EA20-205P)","description":"\u003ch2\u003eHowie Glatter Parallizer 2\"-1.25\" Adapter\u003c\/h2\u003e\n\u003cp\u003eUse with Any 2.0″ opening\u003cbr\u003e\u003cbr\u003eThere is a misconception that the problem of the cylindrical slip-fit system we use for eyepieces and other optical accessories is centering. There are adapters and holders on the market that are advertised as “centering” or “self-centering”, but even if an accessory is pushed off-center a millimeter or more by clamping, that will not introduce a significant problem if the accessory and holder axis remain parallel. This is true even with a laser collimator. In contrast, angular misalignment between the accessory and the drawtube axis of even a few arc minutes can be detrimental, especially for collimation tools and camera adapters. In short, centering is nice, but parallelism is golden!\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eThe Parallizer™ 2 inch-to-1.25 inch adapter utilizes a patented design that insures parallel alignment with the drawtube axis of optical accesories such as eyepieces, camera adapters, and collimation tools. The Parallizer’s unique, patented alignment feature assures that the drawtube and accessory axis will always be dead parallel.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eThe adapter’s non-marring clamp screw is set at 45 degrees, camming the accessory down against the adapter flange when tightened. The Parallizer has zero in-focus loss, and does not require a screw slot to seat fully in a drawtube. It is threaded for 48mm (2”) filters.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eUseful for aligning the returning beam on collimator face.\u003cbr\u003e\u003cbr\u003eRemovable diffractive optical element for use in Glatter Holographic Collimators.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHowie Glatter Parallizer 2\"-1.25\" Adapter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv class=\"entry-content\"\u003e\n\u003cp\u003eHowie Glatter Limited Lifetime Warranty\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003ca title=\"Parallizer Instructions\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Parallizer.pdf?v=1668192855\" target=\"_blank\"\u003eUser Instructions\u003c\/a\u003e\u003c\/p\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":43125733392613,"sku":"HG-EA20-205P","price":126.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/howie-glatter-parallizer-2-1-25-adapter-ea20-205p-astronomy-plus_8bc64e00-4e7e-4d67-b414-6b8887b14227.png?v=1690484347"},{"product_id":"howie-glatter-variable-laser-brightness-cap-upgrade-si-vlb","title":"Howie Glatter Variable Laser Brightness Cap Upgrade (SI-VLB)","description":"\u003ch2\u003eHowie Flatter Variable Laser Brightness Cap Upgrade\u003c\/h2\u003e\n\u003cp\u003eVariable Laser Brightness battery cap\/switch upgrade for laser collimators.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse with a regular laser collimator in single beam mode to perform barlowed laser Newtonian primary mirror alignment on closed tube reflectors.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe Howie Glatter TuBLUG is inserted into the focusers’ draw tube in which the laser collimator then attaches to the otherside of the TuBLUG\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMatte-white 45 degree face and anti-reflection coated Barlow lens mounted in a central axial hole.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe Howie Glatter TuBLUG is easily visible from primary adjustment position and can be turned 180 degrees to face the front and has a cut-out.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHowie Glatter TuBlug 2\" Newtonian Collimator \u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv class=\"entry-content\"\u003e\n\u003cp\u003eHowie Glatter Limited Lifetime Warranty\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":43125746499813,"sku":"HG-SI-VLB","price":84.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/howie-glatter-variable-laser-brightness-cap-upgrade-si-vlb-astronomy-plus-1.webp?v=1690484497"},{"product_id":"howie-glatter-square-grid-projection-attachment-si-hola-square","title":"Howie Glatter Square Grid Projection Attachment (SI-HOLA-SQUARE)","description":"\u003ch2\u003eHowie Glatter Square Grid Projection Attachment\u003c\/h2\u003e\n\u003cp\u003eWhen it comes to lasers and collimation, one of the most trusted names in the business is guru Howie Glatter. His uncompromising quality and dedication to above average products, not only put his name above the rest – but in demand as the finest available on today’s market. Usually a manufacturer doesn’t take the time to explain to a customer exactly why their product excels over others – or why it performs better – but not Howie. Here’s what he has to say about his new Howie Glatter Holographic Laser Collimator Attachment:\u003cbr\u003e\u003cbr\u003eThe holographic collimator has a removable diffractive optical element (“hologram”) placed in the beam, just ahead of the laser. It diffracts light from the laser to project a diverging, symmetrical pattern around the central beam which is quite useful for centering optical elements. My standard pattern is an illuminated ten line by ten line grid, forming a large square box enclosing eighty-one smaller squares. It covers a wider angle (21 degrees) than any other holographic collimator, which allows direct centering of f\/ 2.7 to f\/ 35 optics. It may seem counter-intuitive, but the square grid pattern gives greater sensitivity for centering circular optics of arbitrary size. If a mirror or lens is decentered by only a small amount against the grid pattern, it produces a proportionately larger asymmetry in the intersection points of the grid lines with the perimeter of the optic. Cross-hair patterns do not have this property.\u003cbr\u003eThe diffractors are individually fit to their collimators for maximum alignment accuracy, so if you have one of my holographic collimators and know someone else who has one, be careful not to switch diffractors. If switched, 15 second alignment accuracy in the holographic mode is likely to be lost, however, they will still fall within the several arc minute alignment tolerance of most other laser collimators. Because there are some collimating situations in which the diffracted pattern is unnecessary or unwanted, or maximum power in the central beam may be desired, the diffractor unscrews from the laser aperture, converting the holographic collimator to single beam mode. When it is screwed back it retains its alignment accuracy.”\u003cbr\u003e\u003cbr\u003eAccurate and Precise. What more could you ask?\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eA 10 x 10 line square grid pattern. It spreads 21 degrees which allows centering of optics as fast as f\/ 2.7. This pattern is recommended for general use because it can be used with the fastest telescopes likely to be encountered.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eRemovable diffractive optical element for use in Glatter Holographic Collimators.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHowie Glatter Square Grid Projection Attachment\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv class=\"entry-content\"\u003e\n\u003cp\u003eHowie Glatter Limited Lifetime Warranty\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":43125746761957,"sku":"HG-SI-HOLA-SQUARE","price":112.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/howie-glatter-square-grid-projection-attachment-si-hola-square-astronomy-plus-1.webp?v=1690484504"},{"product_id":"howie-glatter-concentric-circle-projection-attachment-si-hola-circle","title":"Howie Glatter Concentric Circle Projection Attachment (SI-HOLA-CIRCLE)","description":"\u003ch1\u003eHowie Glatter Concentric Circle Projection Attachment\u003c\/h1\u003e\n\u003cp\u003eWhen it comes to lasers and collimation, one of the most trusted names in the business is guru Howie Glatter. His uncompromising quality and dedication to above average products, not only put his name above the rest – but in demand as the finest available on today’s market. Usually a manufacturer doesn’t take the time to explain to a customer exactly why their product excels over others – or why it performs better – but not Howie. Here’s what he has to say about his new Howie Glatter Holographic Laser Collimator Attachment:\u003cbr\u003e\u003cbr\u003eThe holographic collimator has a removable diffractive optical element (“hologram”) placed in the beam, just ahead of the laser. It diffracts light from the laser to project a diverging, symmetrical pattern around the central beam which is quite useful for centering optical elements. My standard pattern is an illuminated ten line by ten line grid, forming a large square box enclosing eighty-one smaller squares. It covers a wider angle (21 degrees) than any other holographic collimator, which allows direct centering of f\/ 2.7 to f\/ 35 optics. It may seem counter-intuitive, but the square grid pattern gives greater sensitivity for centering circular optics of arbitrary size. If a mirror or lens is decentered by only a small amount against the grid pattern, it produces a proportionately larger asymmetry in the intersection points of the grid lines with the perimeter of the optic. Cross-hair patterns do not have this property.\u003cbr\u003eThe diffractors are individually fit to their collimators for maximum alignment accuracy, so if you have one of my holographic collimators and know someone else who has one, be careful not to switch diffractors. If switched, 15 second alignment accuracy in the holographic mode is likely to be lost, however, they will still fall within the several arc minute alignment tolerance of most other laser collimators. Because there are some collimating situations in which the diffracted pattern is unnecessary or unwanted, or maximum power in the central beam may be desired, the diffractor unscrews from the laser aperture, converting the holographic collimator to single beam mode. When it is screwed back it retains its alignment accuracy.”\u003cbr\u003e\u003cbr\u003eAccurate and Precise. What more could you ask?\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eA nine-concentric circle pattern that spans 10 degrees and will reach to the edge of f\/ 5.7 optics. Recommended for scopes around this focal ratio or slower. The Laser light is spread over a smaller area it is brighter than the square grid pattern, this makes it particularly useful with Cassegrain scopes, where the pattern impact is sometimes scrutinized on the mirror surface. The projected pattern is seen only by light that is scattered from dust, dirt, or optical roughness, so a brighter pattern is better, especially if the mirrors are very clean. \u003cbr\u003e\u003cbr\u003eRemovable diffractive optical element for use in Glatter Holographic Collimators.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHowie Glatter Concentric Circle Projection Attachment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv class=\"entry-content\"\u003e\n\u003cp\u003eHowie Glatter Limited Lifetime Warranty\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":43125746827493,"sku":"HG-SI-HOLA-CIRCLE","price":154.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/howie-glatter-concentric-circle-projection-attachment-si-hola-circle-astronomy-plus-1.webp?v=1690484503"},{"product_id":"howie-glatter-cross-hair-circle-projection-attachment-si-hola-cross-hair","title":"Howie Glatter Cross-Hair \u0026 Circle Projection Attachment (SI-HOLA-CROSS-HAIR)","description":"\u003ch2\u003eHowie Glatter Cross-Hair \u0026amp; Circle Projection Attachment\u003c\/h2\u003e\n\u003cp\u003eWhen it comes to lasers and collimation, one of the most trusted names in the business is guru Howie Glatter. His uncompromising quality and dedication to above average products, not only put his name above the rest – but in demand as the finest available on today’s market. Usually a manufacturer doesn’t take the time to explain to a customer exactly why their product excels over others – or why it performs better – but not Howie. Here’s what he has to say about his new Howie Glatter Holographic Laser Collimator Attachment:\u003cbr\u003e\u003cbr\u003eThe holographic collimator has a removable diffractive optical element (“hologram”) placed in the beam, just ahead of the laser. It diffracts light from the laser to project a diverging, symmetrical pattern around the central beam which is quite useful for centering optical elements. My standard pattern is an illuminated ten line by ten line grid, forming a large square box enclosing eighty-one smaller squares. It covers a wider angle (21 degrees) than any other holographic collimator, which allows direct centering of f\/ 2.7 to f\/ 35 optics. It may seem counter-intuitive, but the square grid pattern gives greater sensitivity for centering circular optics of arbitrary size. If a mirror or lens is decentered by only a small amount against the grid pattern, it produces a proportionately larger asymmetry in the intersection points of the grid lines with the perimeter of the optic. Cross-hair patterns do not have this property.\u003cbr\u003eThe diffractors are individually fit to their collimators for maximum alignment accuracy, so if you have one of my holographic collimators and know someone else who has one, be careful not to switch diffractors. If switched, 15 second alignment accuracy in the holographic mode is likely to be lost, however, they will still fall within the several arc minute alignment tolerance of most other laser collimators. Because there are some collimating situations in which the diffracted pattern is unnecessary or unwanted, or maximum power in the central beam may be desired, the diffractor unscrews from the laser aperture, converting the holographic collimator to single beam mode. When it is screwed back it retains its alignment accuracy.”\u003cbr\u003e\u003cbr\u003eAccurate and Precise. What more could you ask?\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eUseful for aligning the returning beam on collimator face.\u003cbr\u003e\u003cbr\u003eRemovable diffractive optical element for use in Glatter Holographic Collimators.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHowie Glatter Concentric Circle Projection Attachment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv class=\"entry-content\"\u003e\n\u003cp\u003eHowie Glatter Limited Lifetime Warranty\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":43125746860261,"sku":"HG-SI-HOLA-CROSS-HAIR","price":84.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/howie-glatter-cross-hair-and-circle-projection-attachment-si-hola-cross-hair-astronomy-plus-1.webp?v=1690484504"},{"product_id":"howie-glatter-tublug-2-newtonian-collimator-si-tublug2","title":"Howie Glatter TuBlug 2\" Newtonian Collimator (SI-TUBLUG2)","description":"\u003ch2\u003eHowie Glatter TuBlug 2\" Newtonian Collimator\u003c\/h2\u003e\n\u003cp\u003eUse the Howie Glatter TuBlug 2\" with a regular laser collimator in single beam mode to perform barlowed laser Newtonian primary mirror alignment on closed tube reflectors. The Howie Glatter TuBlug is inserted into the focusers' draw tube in which the laser collimator then attaches to the otherside of the TuBLUG Matte-white 45 degree face and anti-reflection coated Barlow lens mounted in a central axial hole. The Howie Glatter TuBlug is easily visible from primary adjustment position and can be turned 180 degrees to face the front and has a cut-out.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse with a regular laser collimator in single beam mode to perform barlowed laser Newtonian primary mirror alignment on closed tube reflectors.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe Howie Glatter TuBLUG is inserted into the focusers’ draw tube in which the laser collimator then attaches to the otherside of the TuBLUG\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMatte-white 45 degree face and anti-reflection coated Barlow lens mounted in a central axial hole.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe Howie Glatter TuBLUG is easily visible from primary adjustment position and can be turned 180 degrees to face the front and has a cut-out.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHowie Glatter TuBlug 2\" Newtonian Collimator \u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv class=\"entry-content\"\u003e\n\u003cp\u003eHowie Glatter Limited Lifetime Warranty\u003c\/p\u003e\n\u003cp\u003e\u003ca title=\"Collimator Instructions\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/The-Howie-Glatter-TuBlug.pdf?v=1668194228\" target=\"_blank\" data-mce-href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/The-Howie-Glatter-TuBlug.pdf?v=1668194228\"\u003eUser Instructions\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":43125746893029,"sku":"HG-SI-TUBLUG2","price":336.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/howie-glatter-tublug-2-newtonian-collimator-si-tublug2-astronomy-plus-1.webp?v=1690484504"},{"product_id":"howie-glatter-tublug-1-25-newtonian-collimator-si-tublug1-25","title":"Howie Glatter TuBlug 1.25\" Newtonian Collimator (SI-TUBLUG1.25)","description":"\u003ch2\u003eHowie Glatter TuBlug 1.25\" Newtonian Collimator\u003c\/h2\u003e\n\u003cp\u003eUse the Howie Glatter TuBlug 1.25\" with a regular laser collimator in single beam mode to perform barlowed laser Newtonian primary mirror alignment on closed tube reflectors. The Howie Glatter TuBlug is inserted into the focusers' draw tube in which the laser collimator then attaches to the otherside of the TuBLUG Matte-white 45 degree face and anti-reflection coated Barlow lens mounted in a central axial hole. The Howie Glatter TuBlug is easily visible from primary adjustment position and can be turned 180 degrees to face the front and has a cut-out.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse with a regular laser collimator in single beam mode to perform barlowed laser Newtonian primary mirror alignment on closed tube reflectors.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe Howie Glatter TuBLUG is inserted into the focuser in which the laser collimator then attaches to the otherside of the TuBLUG\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMatte-white 45 degree face and anti-reflection coated Barlow lens mounted in a central axial hole.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe Howie Glatter TuBLUG is easily visible from primary adjustment position and can be turned 180 degrees to face the front and has a cut-out.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHowie Glatter TuBlug 1.25\" Newtonian Collimator\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv class=\"entry-content\"\u003e\n\u003cp\u003eHowie Glatter Limited Lifetime Warranty\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/The-Howie-Glatter-TuBlug.pdf?v=1668194228\" title=\"Collimator Instructions\" target=\"_blank\"\u003eUser Instructions\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":43125746925797,"sku":"HG-SI-TUBLUG1.25","price":224.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/howie-glatter-tublug-1-25-newtonian-collimator-si-tublug1-25-astronomy-plus.webp?v=1690484504"},{"product_id":"howie-glatter-2-laser-collimator","title":"Howie Glatter 2\" Laser Collimator","description":"\u003ch2\u003eHowie Glatter 2\" Laser Collimator\u003c\/h2\u003e\nInside the collimator is a solid-state laser diode, which emits an intense laser beam through a front aperture, exactly along the central axis of the cylindrical collimator body. The beam acts as a “reference line” from which alignments are made. For a laser collimator it is of supreme importance that the beam be aligned with the collimator’s cylindrical axis, for if it is not, the resultant “alignment” of the telescope optics will be off-center and asymmetric, and the telescope will produce aberrated images.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e“When I started manufacturing laser collimators I realized that in order to produce consistent and accurate results they must be highly resistant to mechanical shock, so that internal laser alignment is maintained. I experimented with this aspect of collimator construction and developed a design which tremendously increased shock resistance. After aligning the laser within 15 arc seconds, I shock test each collimator by whacking it against a block of urethane plastic (urethane prevents marring), striking it at least a dozen times on three axis. I then recheck the laser alignment, and if it has not changed the collimator passes. I believe this is the most important difference setting my collimator apart from all others I know of. They will withstand a shock equivalent to dropping from eyepiece position, up the ladder on a big Dob, without alteration of laser alignment.”\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThe beam from all red diode lasers used in collimators is fuzzy-edged and elliptical in cross-section. When collimating, you sometimes must judge the location of the center of the spot by eye. To improve collimating precision, all of my collimators (except 532nm) are supplied with a removable accessory plastic aperture stop having a 1mm hole, which push-fits into the laser aperture. It produces a tiny, circular beam impact which allows more accurate alignment. With the holographic collimators, it is not used at the same time as the optional holographic feature, and the diffractor must be removed to install the stop. With the stop inserted the beam impact at a distance of one meter or more looks like a star diffraction pattern, with a central dot surrounded by diffraction rings. The surrounding rings can help in centering the beam very accurately.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eI offer the red holographic collimators with a choice of either 650 nanometer or 635nm wavelength. The two lasers have the same radiometric power output, but because the human eye’s sensitivity to the shorter wavelength is greater, the 635nm. laser appears about two or three times brighter. The higher cost of 635nm laser diodes increases the collimator price, but it enables optional holographic collimation in brighter ambient light. If you intend to collimate in early twilight, it is a good choice. In darkness, however, the 650nm laser is quite adequate. Because single beam collimators concentrate all the laser light in the central beam, the 650nm laser is quite adequate for them.”\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003ePrecise… Accurate… and Durable… What more could you ask?\u003cbr\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSingle deep red beam operates at 635nm \/ 650nm \/ 532nm. \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe Howie Glatter Holographic Laser Collimator incorporates a solid state laser diode that does not fade or change with time and use. \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFactory-aligned to 15 arc-seconds providing 0.1 inch accuracy at a distance of 20 feet, \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe Howie Glatter Laser Collimator is shock resistant to keep its alignment – even when dropped. \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eIncludes 123A lithium battery, 1mm aperture stop, and protective case.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHowie Glatter 2\" Laser Collimator - 635nm \/ 650nm \/ 532nm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eIncludes 123A lithium battery\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e1mm aperture stop\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eProtective case.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv class=\"entry-content\"\u003e\n\u003cp\u003eHowie Glatter Limited Lifetime Warranty\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"635nm Red Beam","offer_id":43673364758757,"sku":"HG-SI-LC2-635","price":420.0,"currency_code":"CAD","in_stock":true},{"title":"650nm Red Beam","offer_id":43673364889829,"sku":"HG-SI-LC2-650","price":392.0,"currency_code":"CAD","in_stock":true},{"title":"532nm Green Beam","offer_id":43673365020901,"sku":"HG-SI-LC2-532","price":595.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/howie-glatter-2-laser-collimator-astronomy-plus.webp?v=1690484513"},{"product_id":"howie-glatter-1-25-laser-collimator","title":"Howie Glatter 1.25\" Laser Collimator","description":"\u003ch2\u003eHowie Glatter 1.25\" Laser Collimator\u003c\/h2\u003e\nWhen it comes to lasers and collimation, one of the most trusted names in the business is guru Howie Glatter. His uncompromising quality and dedication to above average products, not only put his name above the rest – but in demand as the finest available on today’s market. Usually a manufacturer doesn’t take the time to explain to a customer exactly why their product excels over others – or why it performs better – but not Howie. Here’s what he has to say about his new Howie Glatter Laser Collimator:\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e“The lasers in my collimators are class IIIa lasers (maximum beam power: 5 thousandths of a Watt), and are quite safe if used with reasonable precaution. Direct or mirror-reflected eye exposure to the laser beam should always be avoided! You must be careful when collimating to ensure that the beam does not enter anyone’s eye. There is no problem in viewing the beam’s impact directly on a surface as long as the surface produces a diffuse reflection. The beam impact may also be safely viewed on a mirror or lens surface if the reflected or transmitted beam is not directed towards your eye. Information from studies I have seen suggests that in order to induce permanent damage, a class IIIa laser beam must stay focused on the retina for a long time. It’s unlikely for this to happen because the pupil is a very small target and because we have a blink and aversion reflex to bright light. However, all precautions should still be followed to avoid the beam entering anyone’s eye! A badly miscollimated Newtonian or Cassegrain telescope may allow the beam to exit the front of the telescope, so when collimating, check first by pointing the telescope at a wall or screen to see if the beam is getting out. With unobstructed telescopes such as refractors, the beam will always exit the front of the telescope, so run a strip of masking tape across a diameter of the dew cap opening as a safety beam stop.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eInside the collimator is a solid-state laser diode, which emits an intense laser beam through a front aperture, exactly along the central axis of the cylindrical collimator body. The beam acts as a “reference line” from which alignments are made. For a laser collimator it is of supreme importance that the beam be aligned with the collimator’s cylindrical axis, for if it is not, the resultant “alignment” of the telescope optics will be off-center and asymmetric, and the telescope will produce aberrated images.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eWhen I started manufacturing laser collimators I realized that in order to produce consistent and accurate results they must be highly resistant to mechanical shock, so that internal laser alignment is maintained. I experimented with this aspect of collimator construction and developed a design which tremendously increased shock resistance. After aligning the laser within 15 arc seconds, I shock test each collimator by whacking it against a block of urethane plastic (urethane prevents marring), striking it at least a dozen times on three axis. I then recheck the laser alignment, and if it has not changed the collimator passes. I believe this is the most important difference setting my collimator apart from all others I know of. They will withstand a shock equivalent to dropping from eyepiece position, up the ladder on a big Dob, without alteration of laser alignment.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThe beam from all red diode lasers used in collimators is fuzzy-edged and elliptical in cross-section. When collimating, you sometimes must judge the location of the center of the spot by eye. To improve collimating precision, all of my collimators (except 532nm) are supplied with a removable accessory plastic aperture stop having a 1mm hole, which push-fits into the laser aperture. It produces a tiny, circular beam impact which allows more accurate alignment. With the holographic collimators, it is not used at the same time as the holographic feature, and the diffractor must be removed to install the stop. With the stop inserted the beam impact at a distance of one meter or more looks like a star diffraction pattern, with a central dot surrounded by diffraction rings. The surrounding rings can help in centering the beam very accurately.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eI offer the red holographic collimators with a choice of either 650 nanometer or 635nm wavelength. The two lasers have the same radiometric power output, but because the human eye’s sensitivity to the shorter wavelength is greater, the 635nm. laser appears about two or three times brighter. The higher cost of 635nm laser diodes increases the collimator price, but it enables holographic collimation in brighter ambient light. If you intend to collimate in early twilight, it is a good choice. In darkness, however, the 650nm laser is quite adequate. Because single beam collimators concentrate all the laser light in the central beam, the 650nm laser is quite adequate for them.”\u003cbr\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003c\/h3\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSingle deep red beam operates at 635nm \/ 650nm. \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe Howie Glatter Holographic Laser Collimator incorporates a solid state laser diode that does not fade or change with time and use. \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFactory-aligned to 15 arc-seconds providing 0.1 inch accuracy at a distance of 20 feet, \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe Howie Glatter Laser Collimator is shock resistant to keep its alignment – even when dropped. \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eIncludes 123A lithium battery, 1mm aperture stop, and protective case.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHowie Glatter 1.25\" Laser Collimator - 635nm \/ 650nm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eIncludes 123A lithium battery\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e1mm aperture stop\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eProtective case.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv class=\"entry-content\"\u003e\n\u003cp\u003eHowie Glatter Limited Lifetime Warranty\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"635nm","offer_id":43673062342885,"sku":"HG-SI-LC125-635","price":308.0,"currency_code":"CAD","in_stock":true},{"title":"650nm","offer_id":43673062605029,"sku":"HG-SI-LC125-650","price":294.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/howie-glatter-1-25-laser-collimator-astronomy-plus.webp?v=1690484513"},{"product_id":"howie-glatter-1-25-2-laser-collimator","title":"Howie Glatter 1.25\"-2\" Laser Collimator","description":"\u003ch2\u003eHowie Glatter 1.25\"-2\" Laser Collimator\u003c\/h2\u003e\n\u003cp\u003eWhen I started manufacturing laser collimators I realized that in order to produce consistent and accurate results they must be highly resistant to mechanical shock, so that internal laser alignment is maintained. I experimented with this aspect of collimator construction and developed a design which tremendously increased shock resistance. After aligning the laser within 15 arc seconds, I shock test each collimator by whacking it against a block of urethane plastic (urethane prevents marring), striking it at least a dozen times on three axis. I then recheck the laser alignment, and if it has not changed the collimator passes. I believe this is the most important difference setting my collimator apart from all others I know of. They will withstand a shock equivalent to dropping from eyepiece position, up the ladder on a big Dob, without alteration of laser alignment.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThe beam from all red diode lasers used in collimators is fuzzy-edged and elliptical in cross-section. When collimating, you sometimes must judge the location of the center of the spot by eye. To improve collimating precision, all of my collimators (except 532nm) are supplied with a removable accessory plastic aperture stop having a 1mm hole, which push-fits into the laser aperture. It produces a tiny, circular beam impact which allows more accurate alignment. With the holographic collimators, it is not used at the same time as the holographic feature, and the diffractor must be removed to install the stop. With the stop inserted the beam impact at a distance of one meter or more looks like a star diffraction pattern, with a central dot surrounded by diffraction rings. The surrounding rings can help in centering the beam very accurately.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eI offer the red holographic collimators with a choice of either 650 nanometer or 635nm wavelength. The two lasers have the same radiometric power output, but because the human eye’s sensitivity to the shorter wavelength is greater, the 635nm. laser appears about two or three times brighter. The higher cost of 635nm laser diodes increases the collimator price, but it enables holographic collimation in brighter ambient light. If you intend to collimate in early twilight, it is a good choice. In darkness, however, the 650nm laser is quite adequate. Because single beam collimators concentrate all the laser light in the central beam, the 650nm laser is quite adequate for them.”\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003ePrecise… Accurate… and Durable… What more could you ask?\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSingle deep red beam operates at 635nm \/ 650nm. \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe Howie Glatter Holographic Laser Collimator incorporates a solid state laser diode that does not fade or change with time and use. \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFactory-aligned to 15 arc-seconds providing 0.1 inch accuracy at a distance of 20 feet, \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe Howie Glatter Laser Collimator is shock resistant to keep its alignment – even when dropped. \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eIncludes 123A lithium battery, 1mm aperture stop, and protective case.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHowie Glatter 2\" \/ 1.25\" Laser Collimator - 635nm \/ 650nm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eIncludes 123A lithium battery\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e1mm aperture stop\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eProtective case.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv class=\"entry-content\"\u003e\n\u003cp\u003eHowie Glatter Limited Lifetime Warranty\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"635nm Red Beam","offer_id":43673246171365,"sku":"HG-SI-LC2125-635","price":448.0,"currency_code":"CAD","in_stock":true},{"title":"650nm Red Beam","offer_id":43673246499045,"sku":"HG-SI-LC2125-650","price":434.0,"currency_code":"CAD","in_stock":true},{"title":"532nm Green Beam","offer_id":43673246761189,"sku":"HG-SI-LC2125-532","price":658.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/howie-glatter-1-25-2-laser-collimator-astronomy-plus.webp?v=1690484513"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/collections\/howie-glatter-astronomy-plus.webp?v=1690483140","url":"https:\/\/istronomyplus.com\/collections\/howie-glatter.oembed","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}