You also have to remember this...the older you get, the larger the exit pupil has to be for you to see anything out of an ep'. What makes this even worse is if you have a problem with your eyes to begin with. A 5mm ep is great when you have excellent eyes and they're still able to focus down to such a small exit pupil (like when you're young), but most adults strain getting down to a 7mm exit pupil. If you have any trouble with such small ep's, a way around this (which also works for those monster 40mm or greater ep's when you're looking at huge faint fuzzies or in search and track mode) is to get yourself a camera like a GStar EX and do all your observing through a PC or even a small TV screen. It might not seem as pure as using the ol' Mark 1 Eyeball, but it can be just as rewarding
