What are the benefits of using a large objective 50mm or 56mm on a 10 power bino? I am looking for a high quality bino for of course the lowest of light with great detail. If am using a 10x bino is the extra objective size neccessary?
I will still carry them, hence I am leaning toward the 34 oz ultravids. Or the SLC swaros 40+ oz. Any others?
Would this be the ultimate viewing experience? I would like to glass for hours feeling comfortable (eyeball work).
The only case I can see that you can really benefit from a 5,6mm exit pupil compared to a 5mm it's in the darkest possible conditions or at astronomi. (That's under condition your dark adapted eye pupil reach at least 5,6mm).
Maybe at a boat at sea the sligthly bigger exit pupil can be an advantage.
You get a slightly better brightness at night, but a heavier and longer binocular, so I WOULD PERSONALLY doubt to get a get the 56mm version. One thing to also take in consider is that a 10x56 version usually has smaller field of view than a 10x50, I don't know which binoculars you are thought about.
Let see what other people has to say,
Patric
I use a Minox 10x58 ED for astronomy and it's excellent, but for bird watching and general observing I'd use a 10x50 instead. Once you go above 50mm the weight and size increases significantly. If you've got a specialist need (e.g. astronomy, dedicated owl watcher ???) these larger binos will deliver but it's a big price to pay for that extra bit of aperture and most of the time you wouldn't see the the difference.