|
Peter,
From the info:
The OIBF is 66mm....
If the filter wheel is placed on the camera (say 22 +17 =39mm) then you need a backfocus (from the focuser/OTA) of 66+39= 105mm
This is much more than the ff requirement of 55mm.
Let's assume you add the FF after the ONAG - then you'd need 55+66= 125mm backfocus behind the focuser/ OTA....
|