4 replies to this topic

[skysurfer]

I have a Baader T-2 / 90° Astro Amici-Prism which fits my small (1.25") eyepieces. As this diagonal has a T2 coupling, is it possible to mount large (2") eyepieces on it with an adapter ?

Purchasing a 2" Baader Amici is rather expensive and I hate mirror image (rendered by a 'standard' mirror diagonal) on my ED refractor.

[Mark9473]

Yes it works fine. I put a 2" clicklock clamp on the diagonal as eyepiece holder, and am using 22 Nagler T4 and 26 Q70 with good effect.

[Astrojensen]

It works just fine, as long as the field stop of the eyepiece isn't much larger than the rear aperture of the prism. A small bit larger won't hurt, but if it's much larger, the field of view will be obviously stopped down and quite badly vignetted. 

 

 

Clear skies!

Thomas, Denmark

[SeattleScott]

It says the clear aperture is 31mm. The 22T4 referenced has something like a 31.5mm field stop. So yeah something like that will be fine, but forget a 31 Nagler.

[iKMN]

I also use a T2 diagonal w/2” eyepieces.  Nagler 22 and Ethos 17.  It works with the other shorter FL Ethos as well with field stops less than the clear aperture of the diagonal.  There are a few different T2 diagonals and they have various clear apertures so check the PDF on the Baader website to be sure.