Accessories Filter Accessories Select Options CDK17 and 20 OPTEC TCF-S2/S3 Adapter $140.00 Select Options CDK24 to IRF90/Hedrick Focuser Spacer $400.00 Add To Cart 2.75" Hedrick Focuser $800.00 Select Options Extension Spacer for 7.125" Flange Interface $370.00 – $410.00 Add To Cart Lock Ring for Hedrick 3.5" Focuser and 7.125"Flange Accessories $120.00 Add To Cart PlaneWave 2.75" Focuser to 2" SCT Thread (2"-24TPI) Adapter $180.00 Add To Cart IRF90 Low Profile to Starlight-Xpress SX-AO Adapter $160.00 Add To Cart CDK14-24 & 700 to SecureFit (Base Portion) $140.00 Add To Cart IRF90 to Baader IMP85 Adapter $250.00 Add To Cart PlaneWave 3.5" Hedrick Focuser to SecureFit Adapter $185.00 Select Options CDK12.5 to OPTEC TCF-S2 and S3 Adapter $140.00 Add To Cart CDK12.5 to IRF90 Rotating-Focuser Adapter $199.00 Add To Cart PlaneWave 3.5" Hedrick Focuser to 2" Slip-Fit Adapter $99.00 Add To Cart Securefit to OPTEC 2400-Series Male Adapter $120.00 Add To Cart SBIG ST-Series D-Block to QSI Bolt-Pattern Adapter $80.00 Add To Cart Secure-Fit to SBIG ST-Series Camera Adapter $140.00 Load More Filter Accessories