Resolution versus Magnification
Was looking for a portable iPhone microscope and came by this one on Amazon. Doubted the “50x-1000x magnification” claim and landed on this video by Oliver Kim (here’s his channel on YouTube) on how to make sense of that feature.
The key idea here is to think of a microscope as a device that resolves hitherto unseen things. It’s simply not just a magnifier of small things our eyes cannot resolve. This is the difference between the 2x optical zoom on your iPhone versus the 10x you can slide it up to.
So I don’t doubt that the product on Amazon can do 50x, which is fine for my needs. I just don’t believe that the upper bound (1000x) can provide anything useful.