50mm 1.4 ZA vs Zeiss 55mm 1.8. Same light transmission ?

Started Jan 6, 2019 | Discussions thread
voronspb
voronspb Senior Member • Posts: 1,995
Re: 50mm 1.4 ZA vs Zeiss 55mm 1.8. Same light transmission ?

As a rule of thumb, the more optical elements has the lens, the more light is lost while passing through them. Sigma 50/1.4 loses the most light due to complicated design and probably the lesser coatings than Zeiss T*.

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Vladimir Gorbunov

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