Quote:
Originally Posted by koputai
I think you'll find that cheap wide ange EP's aren't Kellners, they tend to be modified Erfles or modified Konigs.
Kellners have an FOV of only around 45 degrees, about the same as a Plossl.
If you're interested in eyepieces, here's a great read:
http://www.howardastro.org/documents/evolution_of_eyepieces.pdf
Cheers,
Jason. |
This is a really nice monograph. I love the Herschellian eyepiece looking like a cut-off sphere. Herschell often used nice simple solutions, such as in his Herschellian pseudo-off axis reflector. I love Herschell
I might try and get the biggest Plossel possible. ahaa. I got no complains with the plossl