I have an Optec Widefield f/5 focal reducer together with a mounting plate for an ST 7,8,9,10 as well as the Optec violet light rejection filter for sale. From their website: "For tri-color and LRGB work, the WideField is fully compatible with the IFW Intelligent Filter Wheel system. The WideField lens assembly (middle piece above) is threaded for manual insertion of 2" (48mm) threaded filters. When used with the f/10 Schmidt Cassegrain telescope, the WideField offers very low distortion and minimal field curvature. This system is most appropriate for high precision astrometry. Residuals of 0.2 arc seconds or less are common when centroids are matched to GSC star positions with common astrometric programs such as Project Pluto's Charon. Provides unvignetted images up to 18mm diameter. Improved color correction from Blue to Infrared. Fully Multi-Coated 3-element lens system. Four times the imaging area of f/10 systems. Shorter exposures times. Fits the TCF-S or any 2" focuser. Threaded lens cell for 2"(48mm)filters. Mounting Kits for most astronomical CCD cameras.
Selling reducer, mounting plate and filter together. Will not separate. There are some usuall set screw marks on the mounting plate which are not visible when attached to the camera. Optically like new. New $235 plus $50 for the mounting plate. I'm selling all for $210 plus actual shipping. Postal money order preferred. IF you pay by check I will ship after the check has cleared.