Sigma Contemporary 30mm f/1.4 DC DN Review

The Sigma 30mm f/1.4 DC DN is a lens with a split personality. It's a low-light beast with a beautiful bokeh, but it's also a bit of a one-trick pony. The one thing you need to know is this: if you shoot portraits on an APS-C Canon RF camera and want that creamy background blur without breaking the bank, this lens is a solid pick. Just don't expect it to do much else.

The f/1.4 aperture is the star here, and it delivers. It lands in the 88th percentile for aperture, which means it sucks in light like a vacuum. You can shoot in dim bars or at golden hour without cranking your ISO to the moon. The bokeh is smooth and pleasing, scoring in the 82nd percentile. But the autofocus, sitting at the 45th percentile, is just okay. It's not slow, but it's not lightning fast either, especially if you're coming from native Canon glass.

At $419, it's a fair price for the aperture you get. You're paying for that f/1.4 light gathering and nothing else. If that's your primary need, it's worth it. If you need a more well-rounded lens, look elsewhere.

The direct competitor is the Viltrox 35mm F1.7. It's cheaper and gives you a similar focal length and fast aperture, but Sigma typically has better build and optics. For a more versatile option on RF, look at a used Canon RF 35mm f/1.8 IS STM Macro. It's a full-frame lens, has image stabilization, and can do macro, but it costs more. The Sigma wins on pure bokeh and low-light potential for the price, but the Canon is the better all-arounder.

This is a specialist lens. Buy it if you shoot a lot of portraits or low-light scenes on your APS-C Canon RF camera and want great bokeh. It does that one job very well. But if you need image stabilization, close focusing, or snappier autofocus, you should keep looking. For the right shooter, it's a great tool. For everyone else, it's too limited.