HI ALL! is someone from the vintage bino's collectors have 20x50 vintage? recommend or have any brund? I aware to the littel dimmer view due to 50mm objective comparison to 60mm -70mm objectiv. how much loss of brightness between 2.5 exit pupil and 3. exit pupil ?? is there is an chart or formula to show the exit pupil VS brightness ?. and to the main topic any recommendetions ?? for vintage to add to my collection.
Edited by publin, 27 October 2020 - 09:54 AM.