Optics question

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Pocket Lint Contributing Member • Posts: 791
Optics question

Why is it harder to create high contrast, high resolution at large apertures?

If a lens is all about compensating for the refraction of light through the lens(es), why does it become increasingly difficult to compensate for those refractions at large apertures?

 Pocket Lint's gear list:Pocket Lint's gear list
Canon EOS 5D Mark IV Canon EF 50mm f/1.2L USM Rokinon 14mm F2.8 IF ED MC Canon EF 100-400mm F4.5-5.6L IS II Canon EF 16-35mm F2.8L III USM +2 more
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