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Message: <blockquote data-quote="typo" data-source="post: 3144318" data-attributes="member: 83808">Kimmo,Today I needed most of that minute to get to 72" but it was apparent in the first few seconds I was close. By the time I tested the Vanguard the light had dropped a fraction and it was obvious I wasn't going to match it. With the chart increment's around 10% per pattern it's tempting to tinker with the distance. It's worth mentioning that early on in the fog my apparent VA was around 110". My eyes are getting old!Normally with better light conditions then around 65" would be my usual benchmark for a good binocular but my eyesight does vary a bit day to day. On a very good day I have managed 54" but that's rare. Both the binocular stopped down resolution and the the light conditions need to be perfect for that. Stopped down boosted testing is rather more reliable than my eyes alone.The Dawes limit is 116/D, but with a printed line chart I'm really doubtful that is possible. I've had a few stopped down 20mm results around 6.4" level but my best is 6.2" which would make 124/D as the diffraction limit by the chart method. How does that compare with your results?David</blockquote>