Vixen prism diagonal any good?

[stafford_stargazer]

Just wondering how these vixen prism diagonals perform?

Is it worth changing for a stellamira Di-electric diagonal?

What would I notice in difference?

Thanks Gary 

Edited February 7, 2023 by stafford_stargazer

[Don Pensack]

That depends.

If the body of the prism diagonal is plastic (it looks like it is), al all-aluminum body would be an upgrade.  You could use larger and/or heavier eyepieces more safely.

If your scope is shorter than f/8, a mirror diagonal would result in less chromatic aberration on the Moon and planets than a prism.

If either of those two circumstances is true, then a change might be an upgrade.

Optically, though, in terms of brightness of image or image accuracy, it might be a wash.

A dielectric-coated diagonal would also be equally durable in the long run.

 

That assumes you have 3 or 4 eyepieces to cover a decent magnification range with the scope.  That would come first, before a new diagonal.

 

[stafford_stargazer]

Thanks for reply my friend.

I think I'll upgrade, it seems ok but obviously I want to get the best out of my gear.

Thanks Gary