Canon 45mm f1.2 › Vignetting
16 positive · 5 mixed · 10 critical mentions across 31 sources.
And finally I'm sure you're asking about vignetting which is something photographers hate on their photos and it simply means that at the widest apertures of course the lenses tend to make corners darker.
At f4 and f5.6, the extra [music] depth of field which comes from stopping down your aperture begins to make up for the problem.
This lens uses a 10 blade iris which again as you stop down you can start to see forming the shape.
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