Fascinating video from Mats Wernersson that shows you how difficult it is to make your own camera lens, via PetaPixel.
Plenty of photographers these days try their hands at making their own cameras, but Swedish photographer, inventor, and camera maker Mats Wernersson recently did something a little more unusual: he made his own 90mm f/2.8 lens from scratch.
You can watch his build process in the 4-minute video above. The lens is based on a Petzval design that produces swirly bokeh in photos.
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