Quote:
Originally Posted by anj026
These three quotes are from articles written by Al Nagler.
"If the exit pupil of the telescope is larger than the eye's pupil, then the full aperture of the telescope is not being utilized. However, neither image brightness nor resolution is reduced at that low magnification."
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This is a rather sinister piece of semantics ! ..... Do you really expect a company that wants to encourage the sale of as many different eyepieces as possible to give a consice answer ?
If you observe at a lower magnification that your aperture can support for full light cone acceptance - then in relation to the actual scope capability you have in your hands - you are definitely loosing potential resolution.
The larger you can make a DSO object for the light available the more detail you will see as at lower light levels the resolution of the eye drops to a whopping 1 degree or more ! So the higher magnification you can have with full aperture for a given apperture - the more detail you will see. So to say that in relation to the aperture you have that overfilling your pupil with a too low magnification is not compromising resolution is nonsense..
It is true that once your pupil is full - you will not see a brighter image at that magnification by increasing the aperture - but if you actually have a larger aperture available that is not being utilised - then you are definitely loosing resolution on fainter objects ...