Why does viewing a pair of binoculars backwards make the resolution better?
I don’t know how to explain. Try it, and tell us what you think it is?
What is the physics behind it?
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You are observing an optical illusion. What you call “resolution: is focus depth of field. Because you are looking through the binoculars backwards, the aperture (the hole that lets in light) is the small eye hole, like a camera on f8.
When you look through the binoculars properly, the opening is the large end, which makes a large aperture, This is to let in as much light to be magnified as possible. But it makes it like a camera on f1.2
Large aperture, small depth of field
Small aperture, greater depth of field.
You can read here about f stops
This is just a guess, but it seems to me that if you use binoculars to magnify an image, that means that the light is spread out, so it seems there should be some loss of quality. Using the binoculars in reverse would give a smaller but sharper image.
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