{"product_id":"asa-eq800-ritchey-chretien-equatorial-telescope-f6-85","title":"ASA EQ800 Ritchey-Chrétien equatorial telescope f6.85","description":"\u003ch3 data-start=\"171\" data-end=\"230\"\u003e\u003cstrong data-start=\"175\" data-end=\"228\"\u003eASA EQ800 – 0.8-Meter Equatorial Telescope System\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"231\" data-end=\"298\"\u003e\u003cstrong data-start=\"231\" data-end=\"298\"\u003ePrecision-engineered for high-performance equatorial operation.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"300\" data-end=\"828\"\u003eThe ASA EQ800 is a fully integrated \u003cstrong data-start=\"336\" data-end=\"394\"\u003e0.8-meter Ritchey-Chrétien equatorial telescope system\u003c\/strong\u003e, purpose-built for advanced imaging and research applications. Designed with a \u003cstrong data-start=\"474\" data-end=\"506\"\u003esystem focal ratio of f\/6.85\u003c\/strong\u003e, this equatorial configuration offers smooth sidereal tracking and outstanding stability for deep-sky astrophotography. With a \u003cstrong data-start=\"634\" data-end=\"665\"\u003efused silica primary mirror\u003c\/strong\u003e and precision optical surfaces, the system delivers diffraction-limited performance and minimal microroughness—ideal for capturing faint, high-resolution targets.\u003c\/p\u003e\n\u003chr data-start=\"830\" data-end=\"833\"\u003e\n\u003ch3 data-start=\"835\" data-end=\"861\"\u003e\u003cstrong data-start=\"839\" data-end=\"861\"\u003eKey Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"863\" data-end=\"1366\"\u003e\u003cstrong data-start=\"863\" data-end=\"882\"\u003eOptical Design:\u003c\/strong\u003e Ritchey-Chrétien (RC)\u003cbr data-start=\"904\" data-end=\"907\"\u003e\u003cstrong data-start=\"907\" data-end=\"926\"\u003eClear Aperture:\u003c\/strong\u003e 800mm (31.5 in)\u003cbr data-start=\"942\" data-end=\"945\"\u003e\u003cstrong data-start=\"945\" data-end=\"993\"\u003eClear Aperture \/ Focal Ratio Primary Mirror:\u003c\/strong\u003e f\/2.5\u003cbr data-start=\"999\" data-end=\"1002\"\u003e\u003cstrong data-start=\"1002\" data-end=\"1025\"\u003eSystem Focal Ratio:\u003c\/strong\u003e f\/6.85\u003cbr data-start=\"1032\" data-end=\"1035\"\u003e\u003cstrong data-start=\"1035\" data-end=\"1052\"\u003eFocal Length:\u003c\/strong\u003e 5480mm\u003cbr data-start=\"1059\" data-end=\"1062\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"1062\" data-end=\"1078\"\u003eImage Field:\u003c\/strong\u003e 120mm (1.25°)\u003cbr data-start=\"1092\" data-end=\"1095\"\u003e\u003cstrong data-start=\"1095\" data-end=\"1119\"\u003eCentral Obstruction:\u003c\/strong\u003e 41% (linear)\u003cbr data-start=\"1132\" data-end=\"1135\"\u003e\u003cstrong data-start=\"1135\" data-end=\"1155\"\u003eMirror Material:\u003c\/strong\u003e Fused Silica\u003cbr data-start=\"1168\" data-end=\"1171\"\u003e\u003cstrong data-start=\"1171\" data-end=\"1191\"\u003eSurface Quality:\u003c\/strong\u003e \u0026gt;94 Strehl\u003cbr data-start=\"1202\" data-end=\"1205\"\u003e\u003cstrong data-start=\"1205\" data-end=\"1224\"\u003eMicroroughness:\u003c\/strong\u003e 1nm RMS \/ \u0026lt;0.7nm Ra\u003cbr data-start=\"1244\" data-end=\"1247\"\u003e\u003cstrong data-start=\"1247\" data-end=\"1259\"\u003eCoating:\u003c\/strong\u003e Al + SiO₂, Reflectivity \u0026gt;91%\u003cbr data-start=\"1288\" data-end=\"1291\"\u003e\u003cstrong data-start=\"1291\" data-end=\"1318\"\u003eBack Focus from Flange:\u003c\/strong\u003e 345.73mm\u003cbr data-start=\"1327\" data-end=\"1330\"\u003e\u003cstrong data-start=\"1330\" data-end=\"1347\"\u003eTotal Weight:\u003c\/strong\u003e 800 kg (1,764 lbs)\u003c\/p\u003e","brand":"Astro Systeme Austria","offers":[{"title":"Default Title","offer_id":50647787372832,"sku":"ASA-EQ800-f6.85","price":250000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/2135\/2480\/files\/asa-eq800-f685.png?v=1756493978","url":"https:\/\/firstlightastro.com\/products\/asa-eq800-ritchey-chretien-equatorial-telescope-f6-85","provider":"First Light Astro","version":"1.0","type":"link"}