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None of my leaf shutters cause light falloff from
the center (though some of the lenses do at maximum aperture). I don't know how
a leaf shutter could do this unless it's improperly placed within the lens
- which I would think unlikely. All lenses have some (small) light falloff
away from the center. Many large format lenses, when used near their
maximum of their stated coverage circle, have some falloff toward the edges
at maximum aperture which diminishes quickly as you stop down. This is not
due to the shutter, but due to the lens design itself and the manner in which
the manufacturers specify the coverage or coverage circle. Check if the coverage
claimed by the manufacturer is specified at some stop smaller than the maximum
aperture.
Just my observation...
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"I don't mind if you don't like my manners. I don't like them myself. They're pretty bad. I grieve over them long winter evenings." -- Philip Marlowe (Humphrey Bogart)
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