EXCERPT page containing first few paragraphs. 2022-08-16 00:26:41
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Vignetting at f/2.8 is just over two stops into the extreme corners, dropping to about 2/3 stop at f/5.6—well worth stopping down to, say, f/4 (not shown) for more even frame illumination, with f/5.6 likely as good as it will get.
This level of vignetting is to be expected with a normal lens. It is very similar to the the vignetting of the Hassselblad XCD 45mm f/3.5 P.
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These systems are hugely expensive, so make the right choice for your own needs (full frame vs medium format).
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