Sigma DP2M: Aperture Sharpness & Diffraction

Started Oct 24, 2012 | Questions thread
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Sigma DP2M: Aperture Sharpness & Diffraction
Oct 24, 2012

Hi all,

Can anyone give some insight into the sharpness of various f stops. I tend to shoot pretty wide simply because I want to gather as much light as I can while keeping the ISO as low as possible but I am contemplating some longer exposure shots and plan on doing some landscape photography.

Can I shoot at f/16 without worrying about diffraction? I know the quality of this lens is highly touted but I just need to know what the limitations are so I can be mindful of them. What do you guys think the absolute sharpest apertures are?


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