[FlashDrive (Poppy)]

My question is .... having a ' Crayford ' Focuser on the back of a SCT , does it do away with the use of the original focuser.

or ....does it ' supplement ' the original focuser to ' combat ' mirror shift.

I'm assuming you ' focus ' with the original focuser, and then re-focus gently with the Crayford to correct the mirror shift in the SCT ...!!

Would this be right !!

Col....