Quote:
Originally Posted by Wavytone
1. 180 degrees, naked eye, lying on the ground looking up.
2. 3.8 degrees, mainly for locating objects and rich-field views of Milky Way
3. 1 degree, DSO's.
4. 0.2 degrees, high power (planets)
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That's a fairly universal answer that most could agree with I think. I bought a 6"f/5 achro to get 3 degrees and I use my C11 for up to 1 degree on DSO's. My skies rarely let me use high power.
There are so many variables with eyepiece choice (budget, AFOV, transmission, contrast, sharpness, eye relief, weight, eyecup width) and combined scope/eyepiece performance (field curvature, astigmatism, coma) that one observer can't assume they'll like the same eyepiece as another; the best you can do is get recommendations to try for yourself.