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Congrats. First thing, have you verified with Andrews that that model has sufficient back focus to allow prime focus photography with your DSLR?
Many Newtonians don't.
Your mags will be 48x with the 25mm, 80x with the 15mm, and 133x
with the 9mm. The mag is simply the scope's focal length [1200mm]
divided by the focal length of the eyepiece , 9. 15, or 25mm in your case.
The field of view will depend on your eyepieces, as different eyepieces have different apparent fields of view, ranging from about 40 to 100
degrees.
raymo
Last edited by raymo; 08-09-2014 at 09:56 PM.
Reason: correction
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