Leica apo summicron sl 28mm f 2 asph vs sigma 28mm f 1 4 dg hsm art?

The two lenses frame the same on full frame: both are 28mm, and both are autofocus with no stabilisation. The difference is the aperture. The Sigma 28mm f/1.4 DG HSM Art is a full stop faster than the Leica APO-Summicron-SL 28mm f/2 ASPH, so it gives you more light for dim scenes and more blur behind your subject.

If you shoot L-Mount and want the extra light, I'd pick the Sigma. It also comes in Canon EF, Nikon F and Sony E versions, so it's the better choice if you might switch systems. The Leica is L-Mount only, so buy it only if you're already committed to that mount. Both are fine on APS-C too, where they behave like a 42mm lens. For more on how aperture controls background blur, see portraits.

Written by Claude from this site's pages.