{"title":"Reducers\/Correctors","description":"","products":[{"product_id":"reducer-0-7x-cdk24-cdk700","title":"PlaneWave Reducer, 0.7X (for CDK700)","description":"\u003cp data-start=\"62\" data-end=\"134\"\u003e\u003cstrong data-start=\"62\" data-end=\"134\"\u003ePlaneWave CDK700 Reducer – 0.7x Focal Reducer for Flat-Field Systems\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"136\" data-end=\"441\"\u003eThis reducer lens is specifically engineered for use with flat-field telescopes like the CDK700, offering increased flexibility for wide-field imaging and faster exposure times. Designed to preserve image quality while reducing focal length, this accessory enhances the capabilities of your CDK700 system.\u003c\/p\u003e\n\u003cp data-start=\"443\" data-end=\"465\"\u003e\u003cstrong data-start=\"443\" data-end=\"465\"\u003eKey Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"467\" data-end=\"713\"\u003e\u003cstrong data-start=\"467\" data-end=\"492\"\u003eCompatible Telescope:\u003c\/strong\u003e CDK700\u003cbr data-start=\"499\" data-end=\"502\"\u003e\u003cstrong data-start=\"502\" data-end=\"523\"\u003eReduction Factor:\u003c\/strong\u003e 0.7x\u003cbr data-start=\"528\" data-end=\"531\"\u003e\u003cstrong data-start=\"531\" data-end=\"556\"\u003eReduced Focal Length:\u003c\/strong\u003e 3150mm\u003cbr data-start=\"563\" data-end=\"566\"\u003e\u003cstrong data-start=\"566\" data-end=\"592\"\u003eResulting Focal Ratio:\u003c\/strong\u003e f\/4.5\u003cbr data-start=\"598\" data-end=\"601\"\u003e\u003cstrong data-start=\"601\" data-end=\"630\"\u003eBack Focus Compatibility:\u003c\/strong\u003e Requires low-profile version (#700167) when used with Series-5 Focuser and Rotator\u003c\/p\u003e\n\u003cp data-start=\"715\" data-end=\"745\"\u003e\u003cstrong data-start=\"715\" data-end=\"745\"\u003ePerformance \u0026amp; Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"747\" data-end=\"1224\"\u003e\u003cstrong data-start=\"747\" data-end=\"752\"\u003e-\u003c\/strong\u003e Reduces effective focal ratio by 30%, enabling faster imaging and wider field of view\u003cbr data-start=\"838\" data-end=\"841\"\u003e\u003cstrong data-start=\"841\" data-end=\"846\"\u003e-\u003c\/strong\u003e Ideal for survey-style imaging, large-sensor astrophotography, and deep-sky observation\u003cbr data-start=\"934\" data-end=\"937\"\u003e\u003cstrong data-start=\"937\" data-end=\"942\"\u003e-\u003c\/strong\u003e Designed to maintain a flat imaging plane with minimal aberrations across the field\u003cbr data-start=\"1026\" data-end=\"1029\"\u003e\u003cstrong data-start=\"1029\" data-end=\"1034\"\u003e-\u003c\/strong\u003e Compatible with advanced Series-5 imaging accessories using the low-profile version\u003cbr data-start=\"1118\" data-end=\"1121\"\u003e\u003cstrong data-start=\"1121\" data-end=\"1126\"\u003e-\u003c\/strong\u003e Improves imaging efficiency and reduces exposure time requirements for scientific or outreach use\u003c\/p\u003e","brand":"PlaneWave Instruments","offers":[{"title":"CDK700 with IRF90","offer_id":50149037441312,"sku":"700166","price":8600.0,"currency_code":"USD","in_stock":true},{"title":"CDK700 with Series-5 Focuser and Rotator","offer_id":50149037474080,"sku":"700167","price":8600.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/2135\/2480\/files\/700166_.7x_Reducer_CDK700.jpg?v=1746222706"},{"product_id":"reducer-0-7x-cdk1000","title":"PlaneWave Reducer, 0.7X (for CDK1000)","description":"\u003cp data-start=\"150\" data-end=\"233\"\u003e\u003cstrong data-start=\"150\" data-end=\"233\"\u003ePlaneWave PW1000 Reducer – f\/6 to f\/4.25 Conversion for 1-Meter Optical Systems\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"235\" data-end=\"554\"\u003eExpand the imaging flexibility of your PW1000 telescope by converting one of its dual Nasmyth ports to a faster f\/4.25 system. This precision optical reducer transforms the native f\/6, 6000mm focal length to a shorter 4250mm focal length—ideal for wide-field astrophotography and time-sensitive scientific applications.\u003c\/p\u003e\n\u003cp data-start=\"556\" data-end=\"578\"\u003e\u003cstrong data-start=\"556\" data-end=\"578\"\u003eKey Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"580\" data-end=\"823\"\u003e\u003cstrong data-start=\"580\" data-end=\"602\"\u003eCompatible System:\u003c\/strong\u003e PW1000 1-Meter Optical Tube\u003cbr data-start=\"630\" data-end=\"633\"\u003e\u003cstrong data-start=\"633\" data-end=\"656\"\u003eNative Focal Ratio:\u003c\/strong\u003e f\/6 (6000mm)\u003cbr data-start=\"669\" data-end=\"672\"\u003e\u003cstrong data-start=\"672\" data-end=\"696\"\u003eReduced Focal Ratio:\u003c\/strong\u003e f\/4.25 (4250mm)\u003cbr data-start=\"712\" data-end=\"715\"\u003e\u003cstrong data-start=\"715\" data-end=\"739\"\u003eRemaining Backfocus:\u003c\/strong\u003e 6.516″ (165.5mm) from reducer output\u003cbr data-start=\"776\" data-end=\"779\"\u003e\u003cstrong data-start=\"779\" data-end=\"801\"\u003eMounting Location:\u003c\/strong\u003e Nasmyth port (1 of 2)\u003c\/p\u003e\n\u003cp data-start=\"825\" data-end=\"855\"\u003e\u003cstrong data-start=\"825\" data-end=\"855\"\u003ePerformance \u0026amp; Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"857\" data-end=\"1210\"\u003e\u003cstrong data-start=\"857\" data-end=\"862\"\u003e-\u003c\/strong\u003e Allows dual-configuration operation—use one Nasmyth port at f\/6 and the other at f\/4.25\u003cbr data-start=\"950\" data-end=\"953\"\u003e\u003cstrong data-start=\"953\" data-end=\"958\"\u003e-\u003c\/strong\u003e Increases field of view for large-format sensors and widefield surveys\u003cbr data-start=\"1029\" data-end=\"1032\"\u003e\u003cstrong data-start=\"1032\" data-end=\"1037\"\u003e-\u003c\/strong\u003e Ideal for faster exposures, transient object tracking, and survey programs\u003cbr data-start=\"1112\" data-end=\"1115\"\u003e\u003cstrong data-start=\"1115\" data-end=\"1120\"\u003e-\u003c\/strong\u003e Maintains high optical performance while delivering greater imaging speed and versatility\u003c\/p\u003e","brand":"PlaneWave Instruments","offers":[{"title":"Default Title","offer_id":49937790894368,"sku":"1000166","price":15000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/2135\/2480\/files\/reducer-for-website_2-e1622847386134.png?v=1746218643"},{"product_id":"reducer-0-66x-cdk12-5-24","title":"PlaneWave Lens Reducer, 0.66X","description":"\u003ch3 data-start=\"154\" data-end=\"210\"\u003e\u003cstrong data-start=\"158\" data-end=\"210\"\u003ePlaneWave 0.66x Focal Reducer for CDK Telescopes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"212\" data-end=\"595\"\u003eDesigned specifically for flat-field astrographs like the PlaneWave CDK series, this 0.66x focal reducer decreases the f\/ratio of compatible CDK telescopes—significantly shortening exposure times and expanding the field of view. Ideal for wide-field astrophotography, the reducer delivers a 30mm fully illuminated image circle, ensuring sharp performance across large sensor formats.\u003c\/p\u003e\n\u003cp data-start=\"597\" data-end=\"698\"\u003e\u003cstrong data-start=\"597\" data-end=\"628\"\u003ePerformance Transformations\u003c\/strong\u003e\u003cbr data-start=\"628\" data-end=\"631\"\u003eWhen installed, the reducer modifies your CDK telescope as follows:\u003c\/p\u003e\n\u003cp data-start=\"700\" data-end=\"952\"\u003e\u003cstrong data-start=\"700\" data-end=\"719\"\u003e- CDK12.5 (f\/8)\u003c\/strong\u003e → f\/5.3, \u003cstrong data-start=\"729\" data-end=\"748\"\u003e47mm back focus\u003c\/strong\u003e\u003cbr data-start=\"748\" data-end=\"751\"\u003e\u003cstrong data-start=\"751\" data-end=\"770\"\u003e- CDK14 (f\/7.2)\u003c\/strong\u003e → f\/4.8, \u003cstrong data-start=\"780\" data-end=\"799\"\u003e44mm back focus\u003c\/strong\u003e\u003cbr data-start=\"799\" data-end=\"802\"\u003e\u003cstrong data-start=\"802\" data-end=\"821\"\u003e- CDK17 (f\/6.8)\u003c\/strong\u003e → f\/4.5, \u003cstrong data-start=\"831\" data-end=\"850\"\u003e47mm back focus\u003c\/strong\u003e\u003cbr data-start=\"850\" data-end=\"853\"\u003e\u003cstrong data-start=\"853\" data-end=\"872\"\u003e- CDK20 (f\/6.8)\u003c\/strong\u003e → f\/4.5, \u003cstrong data-start=\"882\" data-end=\"901\"\u003e47mm back focus\u003c\/strong\u003e\u003cbr data-start=\"901\" data-end=\"904\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"904\" data-end=\"923\"\u003e- CDK24 (f\/6.5)\u003c\/strong\u003e → f\/4.3, \u003cstrong data-start=\"933\" data-end=\"952\"\u003e47mm back focus\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"954\" data-end=\"1256\"\u003e\u003cstrong data-start=\"954\" data-end=\"977\"\u003eCompatibility Notes\u003c\/strong\u003e\u003cbr data-start=\"977\" data-end=\"980\"\u003e\u003cstrong data-start=\"980\" data-end=\"985\"\u003e-\u003c\/strong\u003e This reducer is compatible with CDK17 models that have an \u003cstrong data-start=\"1044\" data-end=\"1064\"\u003e8.81″ back focus\u003c\/strong\u003e using \u003cstrong data-start=\"1071\" data-end=\"1090\"\u003eAdapter #125166\u003c\/strong\u003e\u003cbr data-start=\"1090\" data-end=\"1093\"\u003e\u003cstrong data-start=\"1093\" data-end=\"1098\"\u003e-\u003c\/strong\u003e CDK17 models with \u003cstrong data-start=\"1117\" data-end=\"1138\"\u003e10.24″ back focus\u003c\/strong\u003e will require \u003cstrong data-start=\"1152\" data-end=\"1171\"\u003eAdapter #200166\u003c\/strong\u003e\u003cbr data-start=\"1171\" data-end=\"1174\"\u003e\u003cstrong data-start=\"1174\" data-end=\"1179\"\u003e-\u003c\/strong\u003e See the instruction manual for installation details and spacing requirements\u003c\/p\u003e\n\u003cp data-start=\"1258\" data-end=\"1558\"\u003e\u003cstrong data-start=\"1258\" data-end=\"1274\"\u003eApplications\u003c\/strong\u003e\u003cbr data-start=\"1274\" data-end=\"1277\"\u003e\u003cstrong data-start=\"1277\" data-end=\"1298\"\u003e- Faster Imaging:\u003c\/strong\u003e Reduce exposure time with faster focal ratios\u003cbr data-start=\"1344\" data-end=\"1347\"\u003e\u003cstrong data-start=\"1347\" data-end=\"1376\"\u003e- Wide Field Performance:\u003c\/strong\u003e Capture larger deep-sky targets with a 30mm illuminated field\u003cbr data-start=\"1438\" data-end=\"1441\"\u003e\u003cstrong data-start=\"1441\" data-end=\"1471\"\u003e- Flat Field Optimization:\u003c\/strong\u003e Engineered for the CDK optical design to maintain a coma- and astigmatism-free image\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"PlaneWave Instruments","offers":[{"title":"CDK12.5\/14\/17","offer_id":49937793843488,"sku":"125166","price":1600.0,"currency_code":"USD","in_stock":true},{"title":"CDK20 \u0026 CDK24","offer_id":49937793876256,"sku":"200166","price":1600.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/2135\/2480\/files\/125166.jpg?v=1745882443"},{"product_id":"cdk20-corrector-lens-assembly","title":"PlaneWave CDK20 Corrector Lens Assembly","description":"\u003ch3 data-start=\"134\" data-end=\"193\"\u003e\u003cstrong data-start=\"138\" data-end=\"193\"\u003ePlaneWave CDK20 Lens Group – Convert f\/7.7 to f\/6.8\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"195\" data-end=\"453\"\u003eThis optional lens group is designed to convert a CDK20 from f\/7.7 to a wider-field f\/6.8 configuration. The process involves simply unscrewing the existing rear lens group from the backplate of the optical tube and replacing it with this alternate lens set.\u003c\/p\u003e\n\u003cp data-start=\"455\" data-end=\"651\"\u003e\u003cstrong data-start=\"455\" data-end=\"477\"\u003eKey Specifications\u003c\/strong\u003e\u003cbr data-start=\"477\" data-end=\"480\"\u003e\u003cstrong data-start=\"480\" data-end=\"507\"\u003eOriginal Configuration:\u003c\/strong\u003e CDK20 f\/7.77\u003cbr data-start=\"520\" data-end=\"523\"\u003e\u003cstrong data-start=\"523\" data-end=\"551\"\u003eConverted Configuration:\u003c\/strong\u003e CDK20 f\/6.8\u003cbr data-start=\"563\" data-end=\"566\"\u003e\u003cstrong data-start=\"566\" data-end=\"593\"\u003eFocal Length Reduction:\u003c\/strong\u003e 3951mm → 3454mm\u003cbr data-start=\"609\" data-end=\"612\"\u003e\u003cstrong data-start=\"612\" data-end=\"637\"\u003eBack Focus Reduction:\u003c\/strong\u003e 1.79\" removed\u003c\/p\u003e\n\u003cp data-start=\"653\" data-end=\"981\"\u003e\u003cstrong data-start=\"653\" data-end=\"683\"\u003ePerformance \u0026amp; Applications\u003c\/strong\u003e\u003cbr data-start=\"683\" data-end=\"686\"\u003e\u003cstrong data-start=\"686\" data-end=\"712\"\u003e- Wider Field Imaging:\u003c\/strong\u003e Ideal for users who need a broader field of view for large-format sensors\u003cbr data-start=\"786\" data-end=\"789\"\u003e\u003cstrong data-start=\"789\" data-end=\"813\"\u003e- Easy Installation:\u003c\/strong\u003e Quick lens group swap with no need for re-collimation\u003cbr data-start=\"867\" data-end=\"870\"\u003e\u003cstrong data-start=\"870\" data-end=\"903\"\u003e- Flexible System Adaptation:\u003c\/strong\u003e Provides the versatility to optimize focal length for different imaging goals\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOR\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"983\" data-end=\"986\"\u003e\n\u003ch3 data-start=\"988\" data-end=\"1047\"\u003e\u003cstrong data-start=\"992\" data-end=\"1047\"\u003ePlaneWave CDK20 Lens Group – Convert f\/6.8 to f\/7.7\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1049\" data-end=\"1259\"\u003eThis accessory lens group is designed to convert a CDK20 telescope from f\/6.8 to a narrower-field f\/7.7 configuration. Simply unscrew the current rear lens group and install this assembly onto the optical tube.\u003c\/p\u003e\n\u003cp data-start=\"1261\" data-end=\"1452\"\u003e\u003cstrong data-start=\"1261\" data-end=\"1283\"\u003eKey Specifications\u003c\/strong\u003e\u003cbr data-start=\"1283\" data-end=\"1286\"\u003e\u003cstrong data-start=\"1286\" data-end=\"1313\"\u003eOriginal Configuration:\u003c\/strong\u003e CDK20 f\/6.8\u003cbr data-start=\"1325\" data-end=\"1328\"\u003e\u003cstrong data-start=\"1328\" data-end=\"1356\"\u003eConverted Configuration:\u003c\/strong\u003e CDK20 f\/7.77\u003cbr data-start=\"1369\" data-end=\"1372\"\u003e\u003cstrong data-start=\"1372\" data-end=\"1398\"\u003eFocal Length Increase:\u003c\/strong\u003e 3454mm → 3951mm\u003cbr data-start=\"1414\" data-end=\"1417\"\u003e\u003cstrong data-start=\"1417\" data-end=\"1441\"\u003eBack Focus Increase:\u003c\/strong\u003e Adds 1.79\"\u003c\/p\u003e\n\u003cp data-start=\"1454\" data-end=\"1787\"\u003e\u003cstrong data-start=\"1454\" data-end=\"1484\"\u003ePerformance \u0026amp; Applications\u003c\/strong\u003e\u003cbr data-start=\"1484\" data-end=\"1487\"\u003e\u003cstrong data-start=\"1487\" data-end=\"1514\"\u003e- Increased Back Focus:\u003c\/strong\u003e Adds valuable space in the imaging train for filter wheels, rotators, and other accessories\u003cbr data-start=\"1606\" data-end=\"1609\"\u003e\u003cstrong data-start=\"1609\" data-end=\"1636\"\u003e- Higher Magnification:\u003c\/strong\u003e Useful for targets requiring tighter framing or increased scale\u003cbr data-start=\"1700\" data-end=\"1703\"\u003e\u003cstrong data-start=\"1703\" data-end=\"1724\"\u003e- Modular Design:\u003c\/strong\u003e Allows your CDK20 system to adapt as your imaging needs evolve\u003c\/p\u003e","brand":"PlaneWave Instruments","offers":[{"title":"From F\/7.77 to F\/6.8","offer_id":49937793909024,"sku":"200204","price":1600.0,"currency_code":"USD","in_stock":true},{"title":"From F\/6.8 to F\/7.77","offer_id":49937793941792,"sku":"2002010","price":1600.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/2135\/2480\/files\/CDK20-f7.77-lens-group-png-e1614983051338.png?v=1745882160"},{"product_id":"lens-66x-reducer","title":"Lens .66x Reducer","description":"\u003cdiv class=\"et_pb_row_inner et_pb_row_inner_2_tb_body\"\u003e\n\u003cdiv class=\"et_pb_column et_pb_column_4_4 et_pb_column_inner et_pb_column_inner_3_tb_body et-last-child\"\u003e\n\u003cdiv class=\"et_pb_module et_pb_wc_description et_pb_wc_description_0_tb_body et_pb_bg_layout_light  et_pb_text_align_left\"\u003e\n\u003cdiv class=\"et_pb_module_inner\"\u003e\n\u003cp\u003eThe PlaneWave 0.66x Reducer is engineered specifically for flat-field telescopes like the CDK20 or CDK24, optimizing focal length for enhanced imaging capabilities. This model, designed for use with the IRF90 rotating focuser, features a low-profile build to accommodate cameras that require extra back focus. While the reducer itself has minimal back focus, it does utilize a substantial portion of the telescope’s overall back focus, so precise spacing is essential. When paired with a compatible camera, this reducer decreases the CDK’s focal ratio while maintaining top-tier optical performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"PlaneWave Instruments","offers":[{"title":"Default Title","offer_id":51249375772960,"sku":"600166","price":1600.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/2135\/2480\/files\/image_805532d3-4a43-489b-bcd4-ad265ae82342.png?v=1771400700"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/2135\/2480\/collections\/200166-lens-reducer-4.png?v=1769752407","url":"https:\/\/firstlightastro.com\/collections\/reducers-correctors.oembed","provider":"First Light Astro","version":"1.0","type":"link"}