WideScan Type III: 20mm

Has anyone tried this eyepiece in a fast reflector? I assume that its performance is similar to the 30 Wide Scan: good in a slow scope, but soft near the edges in a fast one. I'd be interested in anyone's first hand experience.

Thanks,
Richard

I use one a lot in an f/6 Newt. It is VERY good across the field, losing only a bit at the edge. In a 2.5x Powermate, it is razor sharp all across the entire field. Makes a great 8mm eyepiece that way.

That's good to hear. I have the 30mm version (origional KK) and am pleased with it in my 10" f/6. Yes the extreme edges are a little soft but not really bad. Last night I took my 4" f/10 out to our dark sky site and was very impressed with the 30mm with that scope. The double cluster was simply breathtaking , the WHOLE thing in one fov, and sharp to the edges. If the 20mm is as good I think I will get one.

Walt