Quote:
Originally Posted by Merlin66
Dylan,
If you have an older C925 then the reducer (x0.63) needs to be at a fixed distance in front of the CCD chip - 110mm
Depending on the adaptors/ spacers you use (which OAG guider do you have??) you may be able to even fit the OAG between the reducer and the camera....otherwise in front (at f10) is still OK.
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Placing OAG in front of FF/FR is not a good idea. OAG should always be between FF/FR and camera. If you have a filter wheel then image train should be: CCD->FW->OAG->FF/FR->scope.
110 mm is more than enough space for OAG and FW.