{"product_id":"daystar-fc90-flatcap-solar-filter-80-89mm-63mm-erf","title":"DayStar FlatCap White Light Flat Field Solar Filter – 80–89mm Telescope Tubes | Telescope Wolves","description":"\u003cp\u003eTake flat calibration frames for your solar astrophotography. The DayStar FlatCap (FC90) is a white light flat field cap for telescope tubes with 80–89mm outer diameters — slide it over your telescope's front end to take flat frames that correct for sensor dust, vignetting, and uneven illumination in your solar images. An essential part of a complete solar imaging calibration workflow. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eWhite light flat field calibration cap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePurpose\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eFlat-frame calibration for solar astrophotography — corrects vignetting, dust shadows, and pixel response non-uniformity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFit Method\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSlide-over friction fit on telescope front\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTelescope Tube OD\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e80–89mm outer diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eFlatCap for 80–89mm telescope tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44574616223778,"sku":"FC90","price":85.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_Imaging_FlatCap_Solar_Filter_for_80_89mm_Telescope_Tubes_or_63mm_ERF_White_Light_Flat_Field_Cap_for_Solar_Imaging_Photography_FC90.jpg?v=1774330626","url":"https:\/\/telescopewolves.com\/products\/daystar-fc90-flatcap-solar-filter-80-89mm-63mm-erf","provider":"Telescope Wolves","version":"1.0","type":"link"}