Quote:
Originally Posted by Satchmo
You're probably enjoying about 70mm of aperture there but they can't take the wide field away from you ...
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In fact running the numbers and making an assumption of 50 yrs of age and a 6mm maximum pupil dilation, the scope effectively becomes a 75mm/F6.67 scope. Plenty of wasted light going west there. Even with a 6.5mm maximum pupil dilation the scope becomes an 81mm/F6.1 scope
Cheers,
John B