Is the leica apo summicron sl 35mm f 2 asph sharp wide open?

I don't have test data on how sharp this lens is at f/2, so I can't give you a verdict on wide-open sharpness. What the page does cover is that it's a 35mm f/2 prime for full frame, with autofocus and no stabilisation. On full frame it frames as 35mm, and on APS-C it behaves like a 52mm with the depth of field of about f/3.

If you're deciding whether f/2 is useful to you, the aperture explainer covers how much light and background blur each stop gives you. For portraits, aperture and background blur explains why f/2 can be a very thin focus plane at close range. You can also check the lens page for the full specs.

Written by Claude from this site's pages.