Sigma Art 30mm F2.8 EX DN

A pocket-sized prime with autofocus so fast it'll make your kit zoom feel broken. Skip it if you need stabilization or shoot in the dark, but for the street price, it's a gem.

What surprised us most is how snappy and accurate the linear motor AF is. We're talking near-instant lock-on in good light, which makes it a killer street photography lens. The optical performance is solidly middle-of-the-pack, so don't expect clinical sharpness into the corners at f/2.8, but the center is plenty crisp. The bokeh from the 7-blade diaphragm is a standout, rendering backgrounds smoothly and making subjects pop in a way that feels more expensive than it is.

The obvious competitor is a standard kit zoom like the Sony E 18-135mm f/3.5-5.6 OSS. You'll trade the Sigma's snappy prime performance and wider aperture for the Sony's versatility and stabilization. If you need one lens to do it all, the zoom wins. But if you want to learn composition with a fixed focal length and get that blurred-background look, the Sigma is the more fun choice. The Tamron 18-300mm is in a different universe for versatility, but it's a chunky beast compared to this little pancake.

Pricing is a total rollercoaster, with vendors listing this lens anywhere from $158 to a frankly ridiculous $1048. If you can snag it for under $200, it's an absolute steal for a fast-focusing prime. Paying anything over $300 is a mistake when you can get newer, sharper glass for the same money. Hunt for the deal on Amazon where it's most commonly found at the lower end.

The Sigma 30mm F2.8 EX DN Art is a tiny lens that punches way above its weight class where it counts. The one thing to know is that its autofocus is absurdly fast for a budget prime, landing in the 98th percentile of all lenses we've tracked. It's not the sharpest tool in the shed wide open, and it's definitely not a low-light monster, but for a pocketable walkaround lens on a Sony E-mount body, it's a joy to use.

If you're looking for a do-it-all travel zoom or need stabilization for handheld video, this isn't it. Go grab the Sony E 18-135mm f/3.5-5.6 OSS instead. You'll lose some bokeh and low-light ability, but you'll gain a massive range and steady shots.

The Sigma 30mm F2.8 EX DN Art is a fantastic little lens for the right person. It's a no-brainer for Sony E-mount shooters who want a dirt-cheap, fast-focusing prime for street photography or casual portraits. Just know its limitations: it's not a landscape lens, and you'll miss stabilization in video or low light. If you find it at the low end of its crazy price spread, buy it without hesitation.