I was hoping for some advice on binoculars. I originally was lucky enough to buy what turned out to be a great pair of 8 x 21. Have consequently been bitten by the bug and so did my homework on other bins. I use them for bird/wildlife watching, but am trying to keep my weight down due to a partially able arm, so to stsrt with, will compromise on field of view where necessary and stick to 10 x or less. So when I spotted a pair of 8x25 with a Field of 152m / 1000m, compared to my current 8x21 128m / 1000m, I bought them (online). To my surprise though, when they arrived, the actual field of view ’I can see’ is less, than my 8x21.

They are a little brighter, as they should be. But my surprise was the field of view. I thought that maths don’t lie and that an 8x25 at 152m compared to a 8x21 at 128m, just had to have not only increased brightness but a larger field of view? Help I am confused. I thought I could rely upon the specification, to tell me if I will be improving on my 8x21 at 128m/100m. Can anyone explain, as I hope I am not also dependent on the quality of the bins and manufacturer? Thanks all.