C-11, focus reducer and refractor diagonal

Non-SCT diagonal means, used for refractors and needs an adaptor for able
mount on a SCT OTA. Using the FR f/6.3 plus the adaptor and the diagonal, it
sticks farther out, than straite SCT-diagonal, so the primery has to move
more forward to come to focus. Looks like I'm getting vigneting, using the
FR , adaptor ring and the AP refractor diagonal with the Pentax 40mm
eyepiece.
Julius


"HAVRILIAK" wrote in message
...
with the focus reducer,

I suppose you mean focal reducer. You did not specify the focal reducer
size.
If its a f/3.3 then its not meant for viewing but for imaging. If its
f/6.3
then I don't know. In my case, the f/6.3 works fine with a star diagonal,
either the Meade or Tele View typrs.
I'm not sure what is a 2" non-SCT diagonal.