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So I've got a Mamiya RB67 Pro-S somewhere in the post on its way to me and I'm keen to experiment with its use within macro areas. However I'd like to see if I can save myself a roll of film and pick some peoples minds with regard to how the optics behave with this camera with regard to the limitations on sharpness with regard to diffraction.
In short if anyone has any ideas as to how far I can stop the lenses down before softening starts to affect the final image, both with and without extension tubes, I'd be very grateful.
For reference these are the lenses in the post on their way to me:
Lenses 90mm f/3.8, 50mm f/4.5, 180mm f/4.5,
tubes: Mamiya No.1 and No.2
With some light reading and research it seems that the 90mm and 180mm will be the better choices since the 50mm might well show distortion/blurring/softening of the corners with the extension tubes added.
In short if anyone has any ideas as to how far I can stop the lenses down before softening starts to affect the final image, both with and without extension tubes, I'd be very grateful.
For reference these are the lenses in the post on their way to me:
Lenses 90mm f/3.8, 50mm f/4.5, 180mm f/4.5,
tubes: Mamiya No.1 and No.2
With some light reading and research it seems that the 90mm and 180mm will be the better choices since the 50mm might well show distortion/blurring/softening of the corners with the extension tubes added.