I need some help from the optics experts on the forum:
I want to understand which binocular configurations are more likely and which are less likely to cause blackout.
As some of you have seen via another post, I recently bought a pair of 8x50 Ultravids and (VERY sadly) had to return them due to excessive blackout. I can remember ordering them thinking that with a 6.25mm exit pupil diameter my eyes would have more light than they would know what to do with, and yet blackout was still an issue.
Several members have already provided guidance regarding the 8x50s and I really appreciate the help. I would just like to know if there is a general rule(s) one can follow regarding objective size, magnification and eye relief that will generate the least likelihood of blackout.
I ask because I still would like to own a pair of Ultravids and I an leaning towards a pair of 7x42s (I have a pair of Leitz 7x35 BA and love them). I just don't have access to a pair locally and I would like to narrow down candidates before I start the ordering/returning routine with the Internet shop.
Thanks again to all in advance.
This is a truly great forum.
Rgds,
Steffan
I want to understand which binocular configurations are more likely and which are less likely to cause blackout.
As some of you have seen via another post, I recently bought a pair of 8x50 Ultravids and (VERY sadly) had to return them due to excessive blackout. I can remember ordering them thinking that with a 6.25mm exit pupil diameter my eyes would have more light than they would know what to do with, and yet blackout was still an issue.
Several members have already provided guidance regarding the 8x50s and I really appreciate the help. I would just like to know if there is a general rule(s) one can follow regarding objective size, magnification and eye relief that will generate the least likelihood of blackout.
I ask because I still would like to own a pair of Ultravids and I an leaning towards a pair of 7x42s (I have a pair of Leitz 7x35 BA and love them). I just don't have access to a pair locally and I would like to narrow down candidates before I start the ordering/returning routine with the Internet shop.
Thanks again to all in advance.
This is a truly great forum.
Rgds,
Steffan
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