Quote:
Originally Posted by madbadgalaxyman
I have never tried using this filter myself;
but I can definitely say that even when I was in my prime for visual sensitivity at low light levels (when I was in my 20s) and I was regularly visually observing with a 10inch F4 Newt. under dark skies, the most I could usually see in dark sky conditions was a vague area where the sky looked a little more dark than the dark sky around it.
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I concur with your observation - its more about young eyes and transparency. At age 25 I saw it clearly without filter with Gordon Garradds 6" F4 Newt and Nagler 13 under pristine skies at Mt Kaputar that had a level of transparency I never saw again. Galaxy M33 in Triangulum was a clear large hazy patch with naked eye at the time and the Andromeda galaxy probably subtended 1/2 degree also.