Quote:
Originally Posted by glend
So what are the pros and cons of widefield equipment for DSLR imaging? Reading other threads seems to indicate that lenses can suffer from distortion, coma, and in some cases colour dispersion; where as they offer variable focal length and f stop within a single device. Widefield scopes (APO) seem to offer superior optics at least in terms of distortion, coma, and colour control, but usually have a fixed focal length.
Ultra wide field seems to be the domain of specialist lenses and are outside the scope of this question.
What do you use and why?
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Hi Glen,
If you are referring to previous recent threads with photographic lenses that are wide-angle (say < than the film
diagonal) and then really wide & also really/reasonably fast lenses, they are not that easy/inexpensive to make and hence are specialty / expensive and even then there are many competing variables for optimum performance:
Widest Angle of view vs
Largest Aperture vs
High resolution vs
High Contrast vs
Good combination of Contrast/Resolution (MTF performance) vs
Low Coma vs
Low aberration (typically barrel & spherical) distortion vs
Low Chromatic abberation vs
Size vs
Weight vs
Cost
But there are many excellent choices out there, you just need to pick your acceptable compromises from the above
Best
JA