{"product_id":"cdk12-5-telescope","title":"PlaneWave CDK12.5 F\/8 OTA","description":"\u003cp data-start=\"214\" data-end=\"287\"\u003e\u003cstrong data-start=\"214\" data-end=\"287\"\u003ePlaneWave CDK12.5 – 12.5-Inch Corrected Dall-Kirkham Telescope System\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"289\" data-end=\"734\"\u003eThe CDK12.5 from PlaneWave Instruments represents a fusion of precise engineering and innovative optical design, developed for astrophotographers and researchers seeking professional-grade performance in a compact form. Designed to deliver diffraction-limited imaging across large-format sensors, the CDK12.5 combines ease of use with high-end capability—making it equally suited for personal observatories and institutional research facilities.\u003c\/p\u003e\n\u003cp data-start=\"736\" data-end=\"1060\"\u003eWith its 12.5-inch aperture and fully corrected optical path, this system eliminates common aberrations such as coma and astigmatism while maintaining a perfectly flat field. Constructed from carbon fiber and fused silica components, it ensures long-term thermal and mechanical stability across diverse imaging environments.\u003c\/p\u003e\n\u003chr data-start=\"1062\" data-end=\"1065\"\u003e\n\u003cp data-start=\"1067\" data-end=\"1089\"\u003e\u003cstrong data-start=\"1067\" data-end=\"1089\"\u003eKey Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1091\" data-end=\"1578\"\u003e\u003cstrong data-start=\"1091\" data-end=\"1110\"\u003eOptical Design:\u003c\/strong\u003e Corrected Dall-Kirkham (CDK)\u003cbr data-start=\"1139\" data-end=\"1142\"\u003e\u003cstrong data-start=\"1142\" data-end=\"1161\"\u003eClear Aperture:\u003c\/strong\u003e 318mm (12.5 in)\u003cbr data-start=\"1177\" data-end=\"1180\"\u003e\u003cstrong data-start=\"1180\" data-end=\"1196\"\u003eFocal Ratio:\u003c\/strong\u003e f\/8\u003cbr data-start=\"1200\" data-end=\"1203\"\u003e\u003cstrong data-start=\"1203\" data-end=\"1220\"\u003eFocal Length:\u003c\/strong\u003e 2541mm\u003cbr data-start=\"1227\" data-end=\"1230\"\u003e\u003cstrong data-start=\"1230\" data-end=\"1245\"\u003eBack Focus:\u003c\/strong\u003e 265mm from mounting surface\u003cbr data-start=\"1273\" data-end=\"1276\"\u003e\u003cstrong data-start=\"1276\" data-end=\"1293\"\u003eImage Circle:\u003c\/strong\u003e 52mm\u003cbr data-start=\"1298\" data-end=\"1301\"\u003e\u003cstrong data-start=\"1301\" data-end=\"1321\"\u003eMirror Material:\u003c\/strong\u003e Fused silica – low thermal expansion\u003cbr data-start=\"1358\" data-end=\"1361\"\u003e\u003cstrong data-start=\"1361\" data-end=\"1378\"\u003eOTA Material:\u003c\/strong\u003e Carbon fiber – lightweight and rigid\u003cbr data-start=\"1415\" data-end=\"1418\"\u003e\u003cstrong data-start=\"1418\" data-end=\"1438\" data-is-only-node=\"\"\u003eFocusing System:\u003c\/strong\u003e EFA (Electronic Focuser Assembly) box included – integrates temperature monitoring, fan control, and automated focusing via PWI4 Software\u003c\/p\u003e\n\u003chr data-start=\"1580\" data-end=\"1583\"\u003e\n\u003cp data-start=\"1585\" data-end=\"1615\"\u003e\u003cstrong data-start=\"1585\" data-end=\"1615\"\u003ePerformance \u0026amp; Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1617\" data-end=\"1808\"\u003e\u003cstrong data-start=\"1617\" data-end=\"1652\"\u003e- Wide-Field Precision Imaging:\u003c\/strong\u003e\u003cbr data-start=\"1652\" data-end=\"1655\"\u003eDelivers a perfectly flat 52mm image circle with no off-axis coma or astigmatism—ideal for large-format CCD\/CMOS sensors and full-frame astrophotography.\u003c\/p\u003e\n\u003cp data-start=\"1810\" data-end=\"1970\"\u003e\u003cstrong data-start=\"1810\" data-end=\"1835\"\u003e- Scientific Utility:\u003c\/strong\u003e\u003cbr data-start=\"1835\" data-end=\"1838\"\u003eWell-suited for photometric and astrometric research thanks to its consistent field performance and thermally stable optical design.\u003c\/p\u003e\n\u003cp data-start=\"1972\" data-end=\"2153\"\u003e\u003cstrong data-start=\"1972\" data-end=\"2011\"\u003e- Thermal and Structural Stability:\u003c\/strong\u003e\u003cbr data-start=\"2011\" data-end=\"2014\"\u003eFused silica optics and carbon fiber construction maintain optical alignment and focus during rapid temperature changes and long exposures.\u003c\/p\u003e\n\u003cp data-start=\"2155\" data-end=\"2315\"\u003e\u003cstrong data-start=\"2155\" data-end=\"2189\"\u003e- Compact and Observing-Ready:\u003c\/strong\u003e\u003cbr data-start=\"2189\" data-end=\"2192\"\u003eAt 12.5 inches, the CDK12.5 is compact enough for portable use but powerful enough for deep sky and research-grade imaging.\u003c\/p\u003e\n\u003cp data-start=\"2317\" data-end=\"2536\"\u003e\u003cstrong data-start=\"2317\" data-end=\"2351\"\u003e- Integrated Focus Automation:\u003c\/strong\u003e\u003cbr data-start=\"2351\" data-end=\"2354\"\u003eThe included EFA system enables remote and automated focusing, temperature monitoring, and fan control, streamlining your imaging sessions with advanced observatory control via PWI4.\u003c\/p\u003e","brand":"PlaneWave Instruments","offers":[{"title":"Default Title","offer_id":49937787388192,"sku":"125104Q","price":13000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/2135\/2480\/files\/cdk12_5.jpg?v=1747437934","url":"https:\/\/firstlightastro.com\/products\/cdk12-5-telescope","provider":"First Light Astro","version":"1.0","type":"link"}