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Astro-Physics 27TVPH Photo-visual Telecompressor for Celestron C14 or C11 with ADASCT Adapter Included.

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This is an Astro-Physics 0.75x 27TVPH photo-visual telecompressor for a Celestron C14 or C11. It provides a wider field of view with brighter images and faster photographic speeds for astroimaging. It converts the f/11 C14 to f/8.3 and the f/10 C11 to f/7.5.  This is one of the few telecompressors that will cover full frame (35 mm) imaging chips without dramatic vignetting in the corners that would be difficult to correct, even with excellent flat field calibration frames. Furthermore, it significantly brightens peripheral field of view guide stars for better off-axis autoguiding. It comes with an Astro-Physics ADASCT adapter (second image) that will connect it to the rear threads of either a C14 or C11.  See attached example astrophotographs taken with this telecompressor through my Celestron C14.