Hi,
Can anyone provide some of the advantages for the use of flourite
in apo's?
Assuming two scopes of identical aperature, one a flourite with a
slightly faster focal length and the other an ED lens(both meet abbe
criteria), would one see a differnce at the eyepiece?
Is flourite less durable over time? More fragile?
Thanks,
Marc Zukoff
Can anyone provide some of the advantages for the use of flourite
in apo's?
Assuming two scopes of identical aperature, one a flourite with a
slightly faster focal length and the other an ED lens(both meet abbe
criteria), would one see a differnce at the eyepiece?
Is flourite less durable over time? More fragile?
Thanks,
Marc Zukoff