Reward for lost Kraken!
Join Date: Apr 2006
Thanked 131 Times in 128 Posts
Rep Power: 11
Re: Binocular Conundrum: Field of View?
pappy, I understand what you are saying but I think you are missing something.
The binoc makers all claim that a larger exit pupil size is crucial, because the size of the exit pupil (or the iris, whichever is smaller) will "crop" the size of the image on the retina.
So, given that the image is being cropped by the same size exit pupil, which in theory means the same size image is falling on the retina, if the smaller FOV already produces an image that fills the retina, how can the larger FOV be presented onto the same retinal area? Unless the image size is reduced, which would mean a smaller magnification.
You see where I'm finding a contradiction in their logic? If you can fit a camel through the eye of a needle...don't you need smaller camels if you want to fit them through two at a time? (Do I get an award for most mangled analogy on that one?)