{"product_id":"askar-131f-flat-field","title":"Askar 131F Flat-Field","description":"\u003cdiv class=\"e_loop_sub-57 s_list response-transition\"\u003e\n\u003cdiv class=\"cbox-57 p_loopItem\" id=\"saf-detail-0\"\u003e\n\u003ch3 class=\"e_h3-72 s_summary\"\u003eProduct introduction\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-73 s_title clearfix\"\u003e\n\u003cdiv class=\"ce_detail\" id=\"ce_detail-300929\" data-layout=\"flow\"\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1758692328106\"\u003e\n\u003cdiv class=\"ie_grid signal\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1758692328106-0\"\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1758692328111\"\u003e\n\u003cdiv class=\"ie_grid signal\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1758692328111-0\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758692328116\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/3d13b4c3-a038-41cf-a53a-6cd4aeb1dde7.jpg\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1758695723927\"\u003e\n\u003cdiv class=\"ie_grid signal\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1758695723927-0\"\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1758692395112\"\u003e\n\u003cdiv class=\"ie_grid\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1758692395112-0\"\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1758692750443\"\u003e\n\u003cdiv class=\"ie_grid\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1758692750443-0\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758692979816\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/ccdfd9c2-6961-4735-9c2f-496ad4f4eb54.png\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758693091171\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e口径131mm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e131mm Aperture\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_1 p_gridCell\" id=\"content_ie-1758692750443-1\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758693239238\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/fe515f0b-355d-4e93-a124-0c0b7d78f50a.png\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758693285342\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e焦距983mm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e983mm Focal Length\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_1 p_gridCell\" id=\"content_ie-1758692395112-1\"\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1758692757545\"\u003e\n\u003cdiv class=\"ie_grid\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1758692757545-0\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758693343412\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/bf1b0ac6-2908-4c23-b5f9-6d55a3ffcb7c.png\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758693376124\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e4片式APO设计\u003c\/span\u003e   \u003cbr\u003e\u003cspan\u003eQuadruplet Air-Spaced APO\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_1 p_gridCell\" id=\"content_ie-1758692757545-1\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758693414663\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/47316d54-512f-4681-abb6-ed6160ce3ea8.png\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758693529218\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003eED玻璃\u003c\/span\u003e   \u003cbr\u003e\u003cspan\u003eED Glass\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_2 p_gridCell\" id=\"content_ie-1758692395112-2\"\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1758692761528\"\u003e\n\u003cdiv class=\"ie_grid\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1758692761528-0\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758693417195\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/4314b0bf-dd42-428d-8cb7-fc059064a1d2.png\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758693532792\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e全画幅对应\u003c\/span\u003e   \u003cbr\u003e\u003cspan\u003eSupporting Full Frame\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_1 p_gridCell\" id=\"content_ie-1758692761528-1\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758693419346\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/5989fbbd-3194-4050-9643-c46af816908d.png\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758693537728\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e无需平场镜\u003c\/span\u003e   \u003cbr\u003e\u003cspan\u003eNo Need for Flattener\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1758692857644\"\u003e\n\u003cdiv class=\"ie_grid\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1758692857644-0\"\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1758692865898\"\u003e\n\u003cdiv class=\"ie_grid\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1758692865898-0\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758693664869\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/1cf7a4a9-3fc9-4f51-88da-c9aa7e9021f7.png\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758693829344\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e无需计算后截距\u003c\/span\u003e   \u003cbr\u003e\u003cspan\u003e拍摄即接即用\u003c\/span\u003e   \u003cbr\u003e\u003cspan\u003eNo Need to Calculate the Backfocus\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_1 p_gridCell\" id=\"content_ie-1758692865898-1\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758693666993\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/97d4d085-9be2-4042-afe1-eb03ec934f98.png\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758693832474\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e可伸缩遮光罩\u003c\/span\u003e   \u003cbr\u003e\u003cspan\u003eRetractable Lens Hood\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_1 p_gridCell\" id=\"content_ie-1758692857644-1\"\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1758692875773\"\u003e\n\u003cdiv class=\"ie_grid\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1758692875773-0\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758693669034\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/64a607a6-dde8-4607-ac8c-cca1830015ec.png\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758693855816\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e360度旋转器\u003c\/span\u003e   \u003cbr\u003e\u003cspan\u003eRotator\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_1 p_gridCell\" id=\"content_ie-1758692875773-1\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758693671115\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/3afb3b8c-f459-4ed0-8cfe-f21dea4a067e.png\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758693863563\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e2个寻星镜基座\u003c\/span\u003e   \u003cbr\u003e\u003cspan\u003e2 Finder Bases\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_2 p_gridCell\" id=\"content_ie-1758692857644-2\"\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1758692882648\"\u003e\n\u003cdiv class=\"ie_grid\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1758692882648-0\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758693673422\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/52cbc236-d857-4a94-8750-2e46dcf0228d.png\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758693866916\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e1:10微调精密\u003c\/span\u003e   \u003cbr\u003e\u003cspan\u003e1:10 Fine Adjustment\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_1 p_gridCell\" id=\"content_ie-1758692882648-1\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758693675630\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/86cbba6e-9652-419a-84b6-187cd91cadd9.png\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758693869711\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e3英寸有齿\u003c\/span\u003e   \u003cbr\u003e\u003cspan\u003e（R\u0026amp;P）调焦器\u003c\/span\u003e   \u003cbr\u003e\u003cspan\u003e3\" Large Rack- Pinion Focuser\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1758692894251\"\u003e\n\u003cdiv class=\"ie_grid\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1758692894251-0\"\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1758694430168\"\u003e\n\u003cdiv class=\"ie_grid\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1758694430168-0\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758694438314\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/5fdcb589-34df-49e7-943d-adaa60aee387.png\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758694497511\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e1.25英寸\/2英寸目镜接口\u003c\/span\u003e   \u003cbr\u003e\u003cspan\u003e1.25\"\/2\" Visual Adapter\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_1 p_gridCell\" id=\"content_ie-1758694430168-1\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758694440437\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/28df366c-de58-48a8-bf8e-8f901adc50d8.png\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758694500520\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e300mm宽型鸠尾板\u003c\/span\u003e   \u003cbr\u003e\u003cspan\u003e300mm Losmandy Dovetail plate\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_1 p_gridCell\" id=\"content_ie-1758692894251-1\"\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1758692906546\"\u003e\n\u003cdiv class=\"ie_grid\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1758692906546-0\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758694164071\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/5784ad76-3608-4e27-8397-aa65668abe67.png\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758694366938\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e摄影延长管\u003c\/span\u003e   \u003cbr\u003e\u003cspan\u003e4-piece Photographic Adapters\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_1 p_gridCell\" id=\"content_ie-1758692906546-1\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758694637703\"\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_2 p_gridCell\" id=\"content_ie-1758692894251-2\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758694646212\"\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758692328371\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 131F is a large-aperture telescope designed for astronomy enthusiasts, featuring a 131mm aperture, 983mm focal length, and a native F7.5 focal ratio.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt employs a quadruplet optical lens design with three elements in the front and one in the rear, including one piece of  ED glass to effectively suppress chromatic aberration. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cvideo autoplay=\"autoplay\" loop=\"loop\" muted=\"\" playsinline=\"\"\u003e\u003c\/video\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758692328376\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/4f99667b-b292-47ac-ae31-c1634d00cf1b.jpg\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003eThe lens tube incorporates an internal baffle to block stray light, further enhancing image quality. The Askar 131F supports full-frame imaging and delivers excellent star performance across the frame.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1760342212795\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/8123866b-9cf3-4a57-ab98-ae6313f8a599.jpg\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758692328391\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003eContinuing the F series' self-flattening design, users can achieve optimal imaging without purchasing an additional flattener or calculating back focus. Simply connect the imaging accessory, achieve focus, and you're ready to shoot—streamlining the process and lowering the barrier to use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_2 p_gridCell\" id=\"content_ie-1758782785515-2\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758782834511\"\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1760342352395\"\u003e\n\u003cdiv class=\"ie_grid\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1760342352395-0\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1760342352397\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/ea686e4b-3e77-4191-9e28-772c3e113c7a.jpg\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_1 p_gridCell\" id=\"content_ie-1760342352395-1\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1760342352398\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/87588982-4146-46ea-b086-25a4c8e1a295.jpg\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_2 p_gridCell\" id=\"content_ie-1760342352395-2\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1760342352399\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/f3e185f0-74d5-413d-89d0-e39e0b41eee7.jpg\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1758692328406\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe telescope comes standard with a photographic extension tube featuring a built-in 2-inch filter thread and offers M48×0.75 and M54×0.75 adapters for broad compatibility with DSLR cameras and dedicated astronomy cameras, meeting diverse imaging needs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cvideo autoplay=\"autoplay\" loop=\"loop\" muted=\"\" playsinline=\"\"\u003e\u003c\/video\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eStaying true to the brand philosophy, the Askar 131F balances optical performance with user experience. The lens tube is crafted with high-quality CNC machining and painted finish, continuing the F series' iconic blue-and-white color scheme for strong visual identity.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1760342443548\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/f4f9410d-06d8-4063-96d5-6d0c66a8cffd.jpg\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758854164268\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/48a2d43f-cf6d-4c50-a39d-6b7bc5d8f6bd.jpg\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003eWhether for deep-sky imaging or visual observation, the Askar 131F is an ideal choice for advancing your astrophotography journey.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1772528364689\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/a91f8254-3b9e-4238-9ea1-896d6d9d6362.jpg\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1758783510909\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/e4f754e4-b950-43b3-80fd-3bf07b661633.jpg\" width=\"100%\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cbox-57 p_loopItem\" id=\"saf-detail-1\"\u003e\n\u003ch3 class=\"e_h3-72 s_summary\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-73 s_title clearfix\"\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"responsive-title\" colspan=\"3\"\u003e\u003cstrong\u003eParameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e131mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e983mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ef\/7.5\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eQuadruplet air-spaced APO(including one ED glass)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eImage circle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e44mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum accessory connection (with the focuser fully retreated)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eImaging mode: \u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e73mm (from the base of M48×0.75 male thread）\u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e91mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eObserving mode:  \u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e \u003cbr\u003e\u003cstrong\u003e131mm（from the end of 1.25\" eyepiece holder）\u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e141mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum accessory connection (with the focuser fully extended)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eImaging mode: \u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e43mm (from the base of M48×0.75 male thread）\u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e61mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eObserving mode:  \u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e \u003cbr\u003e\u003cstrong\u003e101mm（from the end of 1.25\" eyepiece holder）\u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e111mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003e878mm(including 1.25\" adapter as dew shield contracted）\u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e963mm(including 1.25\" adapter as dew shield fully stretched）\u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e941mm(including the photographic adapter as dew shield contracted）\u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e1026mm(including the photographic adapter as dew shield fully stretched）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocuser travel length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e30mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNet weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e7.9kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGross weight (Including tube ring\u0026amp;dovetail plate)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e9.4kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eM78×1-M54×0.75        \u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e \u003cbr\u003e\u003cstrong\u003eM54×0.75-M54×0.75        \u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e \u003cbr\u003e\u003cstrong\u003eM54×0.75-M48×0.75  (with M48×0.75 filter thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e A 131F OTA，a pair of tube rings, a handle, a 300mm Losmandy dovetail plate,a set of photographic adapters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"responsive-title\"\u003e\u003cstrong\u003eProduct Size Diagram\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cfigure class=\"image\"\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/8a883eef-96d8-4147-a206-fe1420dd4855.jpg\"\u003e\u003c\/figure\u003e\n\u003cfigure class=\"image\"\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/a9e9b79d-844c-4873-9502-9cc87b6f3bf8.jpg\"\u003e\u003c\/figure\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"responsive-title\"\u003e\u003cstrong\u003eConnection Diagram\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cfigure class=\"image\"\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/dbaae082-9703-4ccc-a319-b6dedcb3e3d8.jpg\"\u003e\u003c\/figure\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"responsive-title\"\u003e\u003cstrong\u003eThe Locking Screw Position Diagram\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cfigure class=\"image\"\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/37f4ab88-3b9a-4c66-88f2-1674920272bb.jpg\"\u003e\u003c\/figure\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"responsive-title\"\u003e\u003cstrong\u003eElectronic Focuser Assembly Diagram\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cfigure class=\"image\"\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/1acc5643-0b25-4789-a1b5-11c889ba55e2.jpg\"\u003e\u003c\/figure\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"responsive-title\"\u003e\u003cstrong\u003eOptical Path Diagram\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cfigure class=\"image\"\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/e9cb86dc-bee7-488c-89ef-47160eaf5769.jpg\"\u003e\u003c\/figure\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"responsive-title\"\u003e\u003cstrong\u003eSpot Diagram\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cfigure class=\"image\"\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/96389167-369e-4ff4-bbd2-43768e5ac17d.jpg\"\u003e\u003c\/figure\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cbox-57 p_loopItem\" id=\"saf-detail-2\"\u003e\n\u003ch3 class=\"e_h3-72 s_summary\"\u003eVideo\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-73 s_title clearfix\"\u003e\n\u003cdiv class=\"video-box\" controlslist=\"nodownload\"\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/7C15-9tI8NU?si=wJp2hAxbgth002hC\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cbox-57 p_loopItem\" id=\"saf-detail-3\"\u003e\n\u003ch3 class=\"e_h3-72 s_summary\"\u003eImages\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-73 s_title clearfix response-transition\"\u003e\n\u003cfigure class=\"image image_resized\"\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/b5f6d47e-bc5a-42e3-bf8a-da1e5312b953.jpg\"\u003e\n\u003cfigcaption\u003e\u003cspan\u003e\u003cstrong\u003eNGC281  |  张宇航  |  Askar 91F Flat-Field + ZWO ASI2600MC\u003c\/strong\u003e\u003c\/span\u003e\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003cfigure class=\"image image_resized\"\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/aa472e92-cdc4-42e5-abc2-11effb6bf352.jpg\"\u003e\n\u003cfigcaption\u003e\u003cspan\u003e\u003cstrong\u003eNGC7293  |  张宇航  |  Askar 91F Flat-Field + ZWO ASI2600MC\u003c\/strong\u003e\u003c\/span\u003e\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003cfigure class=\"image image_resized\"\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/bf5f815c-b3ec-47c2-9a98-7de9df824319.jpg\"\u003e\n\u003cfigcaption\u003e\u003cspan\u003e\u003cstrong\u003eGyulbudaghian's Nebula  |  Nico Carver  |  Askar 91F + ZWO ASI2600MC Air\u003c\/strong\u003e\u003c\/span\u003e\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":53458163663162,"sku":null,"price":209999.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0691\/1456\/0826\/files\/1311.webp?v=1778828810","url":"https:\/\/edisla.in\/products\/askar-131f-flat-field","provider":"EDISLA","version":"1.0","type":"link"}