I just got a 1200mm f/10 Celestron mirror lens from the critterpix guy.
I'm not sure I'll ever get a decent shot with it, but hey, it'll be fun to
play with. And I got it cheap. I suspect f/10 is a bit optimistic and
that it's probably closer to f/16 in T-stop terms. But that's what they
make ISO 1600 film for, isn't it?
Anybody got anything longer?
Walt
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