50 inches and 40 mm gives 32X. With a wide field, that is a bit over two degrees. With 87.5 inches and a 40 mm, you have 55X and about 1.5 degrees. Still great Milky Way views. With the f7, you can also get stunning, high power planetary views with longer focal length eyepieces (more eye relief) and easier viewing. You don't have to try and look through as small a hole. I still would take the f7 over the f5, although f5 is beter than f4.5. Brent --- David L Bennett <dlbennett@mac.com> wrote:
Don't forget considerations of field of view! My 10" f/5 Cave with a 40mm Tele Vue Wide Field gives some very impressive Milky Way shots ;)
On Friday, February 21, 2003, at 09:58 AM, Chuck Hards wrote:
Everyone should, unless there is a specific reason for going "short". Of course, legitimate reasons include transportation and ergonomics.
Brent's always been right-on in that department! :)
C.
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