Quote:
Originally Posted by ngcles
But I've equally seen a lot of folks using 35mm and 41mm Panoptics and 40mm and 55mm Plossls to achieve that "Ultimate wide-field" in 'scopes that will make for 7 and 8mm exit-pupils -- sure its wide, but you may as well place an aperture stop over the front of the 'scope! Not marginal at all. You are throwing away between 15 and 30% of your light-gathering power!
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I am not sure that using an exit pupil of 7mm or greater (as I use with my lowest power) is such a felony.
I find that the longer focal length eyepieces with consequent greater exit pupils will provide a much wider TFOV. Although you cannot "take it all in at once" you can move your eye around the field to take in any objects of interest.
nice.