CCD Telecompressor (CCDT67)
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CCD Telecompressor (CCDT67)

$189.00
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Description CCD Telecompressor (CCDT67) Originally developed to tame the focal length of our 10" f/14.6 Mak-Cass, this telecompressor is optimized for scopes ranging from f/9 to f/18 focal ratio. The 2-element cemented design transmits close to 99% of the incoming light over the range of 420 to 700 nm. The focal length of the telecompressor optics is 12".  For refractors, the field is compressed by 0.67x.  If you have a moving mirror system, the native focal ratio will increase.   This optic is not recommended for telescopes with f/ratios below about f/8-9. For faster instruments, we recommend the Photographic-Visual Telecompressor (27TVPH). The CCDT67 design allows full corner-to-corner illumination up to an 8300 or APS-C size chip with most catadioptric telescopes.  This design does not add coma to the wavefront, and thus, can be used with all flat-field and coma-free telescopes such as Maksutov-Cassegrains, Schmidt-Cassegrains, Ritchey-Chretiens and refractors.  The inherent resolut

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