A Low F Number Lens, From Scratch - The F-number of a photographic lens is a measure of its light-gathering ability, a... - https://hackaday.com/2025/04/06/a-low-f-number-lens-from-scratch/ #digitalcamerashacks #projectorlens #f-stop #lens
Hackaday · A Low F Number Lens, From ScratchThe F-number of a photographic lens is a measure of its light-gathering ability, and is expressed as its aperture diameter divided by its focal length. Lenses with low F-numbers are prized by photo…