Hi. I have a Canon EOS 350D and a SW880 10" with a 2" crayford focuser which I replaced the R&P .
I have the appropriate T rings adapters etc, however although the focal length with the crayford has been reduced by 10mm, The Canon is still out of the f range with the focuser fully in by about 25mm. By holding the camera face against the focuser face (no T ring/adapters) I can just focus in a 5mm range. (prime focus mode)
The distance between the sensor and the camera face is app 35mm which does not allow for the fitting of the T ring and adapter which adds app 25mm. (a total focal addition of 60mm)
On my homemade 8" I overcame this by raising the primary mirror 60mm, that in turn required the EPs to be fitted to an extension tube. I don't want to mess around with mirrors on the 10"
Any suggestions please short of buying a low profile focuser (Moonlite) ??
Happy New Year to all.