Interesting phenomenon, why do eyes see perfectly sharp but a lens cannot focus in aquarium?

kelpdiver wrote:

Jeeter001 wrote:

The interesting part of this phenomenon is that when "shooting down" my eyes see a perfect sharp crisp subject while my camera lens cannot. Is this due to having a brain to process the image or because of having two eyes vs. one lens? Or just some limitation of cameras?

I wonder if this is a matter of our brains processing the continuous read into sharpness, same way that we are happy with 24 frames per second on film movies. The individual frames aren't great, but continuous works as our brain fills in the bits.

I would have suggested your manual focus test, perhaps not a 6x zoom however, unless you're using a tripod. At that level of mag, your ability to keep it steady is questionable.

Personally I struggle a bit - brain hurts when I look at the extreme angles. Now I want an aquarium to try this out. Also wonder if the home size, where the acrylic is relatively thin, is different from the large aquariums with hundreds of thousands or millions of gallons and much thicker panels.

IBIS and optical stabilization make it plenty easy to keep the image steady, even when looking at a 6x digital zoom for manual focus assist.  I'm usually using my 30mm macro  (60mm equiv) so that is not hard to steady that, even without IBIS & I.O.S.

That is an interesting similar phenomenon.  When we look at the individual frames in a movie they do not look nearly as nice as the fluid movie, our brains either sharpen it up for us or some other trick at play.