Sigma Contemporary 30mm f/1.4 DC DN Review

The Sigma 30mm f/1.4 DC DN is a prime lens built for Canon's EF-M mount, and its headline feature is that bright f/1.4 aperture. That lands it in the 87th percentile for aperture among similar lenses, which means you're getting a lot of light-gathering power for the price. It's a specialist, scoring best for portraits (78.1/100) and decently for professional and video work, but it's not built to be your only lens. Its travel score is a low 31.3, which tells you it's meant for specific shoots, not all-day walkaround use.

This lens is all about that f/1.4 aperture and the creative control it gives you. The bokeh quality sits in the 79th percentile, so your background blur will be smooth and pleasing, a big plus for portraits. Optically, it's solid but not class-leading, ranking in the 61st percentile. Where it takes a step back is in autofocus, landing at the 48th percentile. It'll get the job done, but don't expect lightning-fast or silent performance, especially for video. And with no stabilization (41st percentile), you'll need steady hands or good light when shooting handheld.

At around $380, this lens offers a compelling price for that f/1.4 aperture. You're paying for the large maximum aperture and solid build, not for cutting-edge autofocus or stabilization. Compared to first-party options, it's often cheaper, but you need to weigh that against the middling AF performance. It's a value pick for photographers who prioritize light gathering and bokeh over everything else.

Compared to something like the Viltrox 35mm f/1.7, the Sigma has a slight edge in maximum aperture (f/1.4 vs f/1.7) and likely build quality, but the Viltrox might be cheaper. Against a zoom like the Panasonic 14-140mm, you're trading all that versatility (where the Sigma scores a 38 for versatility) for a much brighter aperture and better portrait performance. The Sigma is a tool for a specific job, while the zooms are generalists. For Canon EF-M shooters wanting a fast prime, it's one of the few dedicated options, which helps its case.

If you shoot a Canon EF-M camera and want a fast, well-built prime lens for portraits or low-light work, the Sigma 30mm f/1.4 is a solid choice. Just go in with your eyes open. Its autofocus is merely average, and it lacks stabilization, so it's best used in controlled situations or good light. For the price, that f/1.4 aperture and nice bokeh are hard to beat, but if you need one lens to do everything, look at a zoom instead.