F stop technical limits?

Started 2 months ago | Discussions thread
Lee Jay Forum Pro • Posts: 55,247
Re: Lower f-numbers bend light more...

Great Bustard wrote:

...and it becomes exponentially more difficult to control aberrations as the light is bent more and more as the physical limit of f/0.5 is approached, as more lens elements are added to apply the necessary corrections, resulting in a larger, heavier, and more expensive lens.

And the reason for that is (as I understand it), the properties of glass (refractive index, dispersion, etc.) do not scale.

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Lee Jay

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