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Some measurements taken from the OTA...
Distance from OTA radius plate surface to infinity focus plane - 107mm
(one 1mm thick luminance filter in place)
Height of fully racked in focuser - 72mm
Available back focus 35mm...
Enough for your average CCD (?what about filter wheels), doubtful on the DSLR....
So a low profile moonlite, which are apparently 38mm high will buy another 34mm of back focus.... for a maximum of 69mm back focus....
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