What is the optimized image circle for the EdgeHD OTAs and Reducers?
August 25, 2009
If you are using one of the .7 reducer lenses for either the 1400 or 1100 Edge HD optical tubes, the diameter of the image circle will remain at 42mm. If you are using the .7 reducer lens for the 800 Edge HD the image circle will will shrink to 26.7mm in diameter. The shrunken image circle will fully illuminate a cropped DSLRs (APS-C) senor or smaller CCD.