{"product_id":"askar-203apo-refractor-telescope-203apo","title":"Askar 203APO 203mm F\/7 Triplet Refractor Telescope (203APO)","description":"\u003ch2\u003eAskar 203APO 203mm F\/7 Triplet Refractor Telescope\u003c\/h2\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1721116455624\"\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 203APO is an OTA with a 203mm aperture, a 1421mm focal length, and a native focal ratio of F7.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 203APO has a 20% larger effective aperture area than the 185APO, and the limiting magnitude can reach 13.3.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe large aperture provides an inherent advantage in terms of light-gathering power, resolution, brightness, and contrast, allowing the photographer to gather more light and present more details and brighter objects in the image.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 203APO adopts a triplet air-spaced APO lens design, including one piece of ED glass.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar APO series employs special optical designs and multiple lens elements to correct chromatic aberration, naturally providing higher-quality object details and color accuracy.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn the refractor's element structure, increasing the number of lens elements and designing lens combinations can effectively improve chromatic aberration correction. However, this also means increased production costs and design complexity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eED glass, also known as low-dispersion glass, is a type of optical glass specifically designed to reduce chromatic aberration.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1721116455629\"\u003e\n\u003cdiv\u003e\u003cimg height=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/26e40f99-7f31-41f7-9715-76f3dd61c582.jpg\" width=\"100%\" data-mce-src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/26e40f99-7f31-41f7-9715-76f3dd61c582.jpg\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1721116455634\"\u003e\n\u003cp\u003e\u003cspan\u003eAs a large aperture, long focal ratio OTA, the Askar 203APO was designed with portability in mind. Due to the retractable lens tube design, the shortest overall length is only 1145mm, the net weight is 14.9kg, and the gross weight is 23.5kg (including the handle, tube ring, and dovetail plate).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEach piece of Askar 203APO is equipped with a unique name ring for identification.The retractable design of the dew shield, along with the enlarged locking screws, provides convenient usage.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 203APO's tube ring has an enhanced triplet design, which is sturdy. The thumb screws enable easy opening and locking of the tube rings. Meanwhile, the base of the tube rings is heightened, providing more space.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 203APO has an extended 402mm handle with a special slot design, making it also a base for installing a finder scope.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe dovetail plate of the Askar 203APO is the standard Losmandy dovetail plate, which is compatible with most equatorial mounts and bases on the market. The dovetail plate is designed with multiple holes, which makes it easy to adjust the position. The length of the dovetail plate has been extended to 500mm, which is more convenient for balancing on the mount.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1721116455639\"\u003e\n\u003cdiv\u003e\u003cimg height=\"354\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/cc66a819-4aea-4879-a03a-5d72e677f609.jpg\" width=\"501\" data-mce-src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/cc66a819-4aea-4879-a03a-5d72e677f609.jpg\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1721116455644\"\u003e\n\u003cp\u003e\u003cspan\u003eIt is worth mentioning that the rear lens tube of the Askar 203APO has an integrated retractable design. We strengthen the overall stability and ensure that the optical axis will not be affected when the lens tube is stretched, thus guaranteeing the quality of the image. The retractable part also features a rudder-type locking ring that makes it easy to loosen or tighten.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhen the lens tube is stretched, the 203APO can be connected to a diagonal and an eyepiece for observation. When the lens tube is contracted, the Askar 203APO can be used with a binoviewer for visual observation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1721116455649\"\u003e\n\u003cdiv\u003e\u003cimg height=\"331\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/ef6f0513-fcd1-456e-8b69-e8b8333432a3.jpg\" width=\"468\" data-mce-src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/ef6f0513-fcd1-456e-8b69-e8b8333432a3.jpg\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1721116455659\"\u003e\n\u003cp\u003e\u003cspan\u003eIn terms of the focuser, the Askar 203APO is equipped with a dual-speed rack and pinion large 3.5-inch rigid focuser, which can be compatible with most motorized focusers on the market. There is a high-precision scale printed on the 100mm focusing travel. The entire focuser barrel is CNC machined with an anti-reflective internal design and matting paint, providing extra measures to eliminate stray light.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere are two finder bases on both sides of the focuser, which not only eliminates the need for disassembling when changing the position of the finder scope but also provides additional mounting positions for other astronomical accessories.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe rear of the focuser features a 360° high-precision big rotator, along with precise scales for convenient adjustment and saving of rotation angles, enabling precise rotation. It is also equipped with an enlarged rotator locking screw that can be easily secured even under high loads.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn terms of visual observation, the focuser interface at the rear comes with a 1.25\"\/2\" adapter， so the 203APO can easily achieve focus when connected to 1.25\" or 2\" diagonals or various eyepieces. Because of the retractable lens tube design, it can also be attached to a binoviewer for visual observation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe entire Askar 203APO tube is crafted using high-quality CNC machining with anodized and surface spray paint treatments. The orange accents on the ivory-white tube add a bright and eye-catching touch, presenting a stylish and elegant overall appearance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLater, the specialized Askar 203APO reducer and flattener will also be launched, giving more possibilities for the Askar 203APO.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e203mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e1421mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ef\/7\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eTriplet air-spaced APO (including one ED glass)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e1145mm(when the dew shield is contracted)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eThe length of the rear retractable lens tube\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e150mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eGross weight（including tube ring and dovetail plate）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e23.5kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e2\"\/1.25\" visual adapters\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ean 203APO OTA, a group of tube rings, a handle, an Askar 500mm Losmandy dovetail plate, an aluminum box，a manual\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003cstrong\u003eProduct Size Diagram\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg height=\"1828\" width=\"2218\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Askar_203apo_1.jpg?v=1726770218\" alt=\"\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Askar_203apo_1.jpg?v=1726770218\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"415\" width=\"1290\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Askar_203apo_2.jpg?v=1726770257\" alt=\"\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Askar_203apo_2.jpg?v=1726770257\"\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003cstrong\u003eInstruction of using the 203APO retractable lens tube ( for eyepiece observation, 1.0x flattener, and 0.8x reducer)\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg height=\"1581\" width=\"2073\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Askar_203apo_3.jpg?v=1726770327\" alt=\"\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Askar_203apo_3.jpg?v=1726770327\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003cstrong\u003eThe Locking Screw Position Diagram\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg height=\"425\" width=\"1068\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Askar_203apo_4.jpg?v=1726770460\" alt=\"\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Askar_203apo_4.jpg?v=1726770460\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e203APO EAF (Optional) Installation\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/203apo_1.png?v=1726770719\" width=\"1174\" height=\"550\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/203apo_2.png?v=1726770719\"\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/203apo_3.png?v=1726770719\"\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/203apo_4.png?v=1726770719\"\u003e\u003c\/h3\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003cstrong\u003eOptical Path Diagram\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Askar_203apo_6_855ee829-12d6-4673-abdc-57cae8e82d9c.jpg?v=1726770841\" width=\"1712\" height=\"847\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAskar 203APO OTA\u003c\/li\u003e\n\u003cli\u003ePair of Tube Rings\u003c\/li\u003e\n\u003cli\u003eA handle\u003c\/li\u003e\n\u003cli\u003ea 500mm Vixen Dovetail plate\u003c\/li\u003e\n\u003cli\u003eAluminum Case\u003c\/li\u003e\n\u003cli\u003eManual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"station-tabs-tabtitle\"\u003e\u003cspan id=\"station-tabs-tab_ht-i1-t38\" class=\"station-tabs-tab mod-last is-active\" aria-controls=\"station-tabs-tabpanel_ht-i1-t38\" data-slug=\"warranty-amp-manuals\" role=\"tab\" aria-selected=\"true\" tabindex=\"0\" data-mce-tabindex=\"0\"\u003e\u003cspan class=\"station-tabs-tabtext\"\u003eWarranty \u0026amp; Manuals\u003c\/span\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"station-tabs-tab mod-last is-active\" aria-controls=\"station-tabs-tabpanel_ht-i1-t38\" data-slug=\"warranty-amp-manuals\" role=\"tab\" aria-selected=\"true\" tabindex=\"0\" data-mce-tabindex=\"0\"\u003e\u003cspan class=\"station-tabs-tabtext\"\u003eAskar Warranty\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":45991542554853,"sku":"ASK-203APO","price":12011.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/23932c28-d13e-4810-bbb0-a035983a18b6.png?v=1777044994","url":"https:\/\/istronomyplus.com\/products\/askar-203apo-refractor-telescope-203apo","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}