Sigma Contemporary 10-18mm f/2.8 DC DN

The Sigma 10-18mm f/2.8 DC DN Contemporary is a tiny, sharp, constant-aperture ultra wide zoom for APS-C mirrorless cameras. It's perfect for travel, vlogging, and real estate work, with excellent low-light performance and a 15-27mm full-frame equivalent range. Just know it lacks stabilization and needs some distortion correction in post.

Sharpness is where this lens earns its keep. The 13 elements in 10 groups include 4 ED elements and 1 aspherical element, and the Super Multi-Layer Coating does a solid job keeping flare and ghosting under control. In our database, optical quality lands in the 83rd percentile, which means it's well above average for ultra wide zooms. Center sharpness is excellent wide open at f/2.8, and corners catch up nicely by f/5.6. For real estate interiors or landscape shots, you'll get crisp detail across the frame without much fuss.

Autofocus is fast and nearly silent thanks to the internal focus system, though our AF metric puts it at the 54th percentile, so it's middle of the pack rather than class-leading. For stills, that's totally fine. For video, it tracks smoothly and doesn't hunt much in good light. The lack of stabilization is the real weak point here, sitting at the 37th percentile. On Sony bodies with IBIS you won't care, but on cameras without it, handheld video at 18mm will show some shake. The 117mm minimum focus distance and 1:4 max magnification also let you get surprisingly close for a wide zoom, which is fun for exaggerated foreground shots.

The most direct comparison is the Sony E 18-135mm f/3.5-5.6 OSS. That Sony is more versatile with its longer reach and has stabilization, but it's slower, bigger, and not nearly as wide. If you shoot travel and want one lens that does everything, the Sony makes sense. If you want dramatic wide angles and low-light capability, the Sigma wins. The Nikon NIKKOR Z 17-28mm f/2.8 is another f/2.8 wide zoom, but it's built for full-frame Z mount and costs considerably more, so it's not really a fair fight for APS-C shooters. The Tamron 28-300mm f/4-7.1 is a superzoom, which is a completely different tool, and the Panasonic Leica 12-35mm f/2.8 is a Micro Four Thirds lens with a tighter equivalent range. For Sony APS-C users specifically, the Sigma 10-18mm f/2.8 is in a pretty unique spot right now.

Value is tricky because the price swings so much. In the US, we've tracked listings from USD 540 to USD 810 across 28 vendors, and the best deal we found was at Best Buy on the lower end of that range. In Canada, the spread is CAD 922 to CAD 1,045, so again, a little patience saves you real money. For a constant f/2.8 ultra wide zoom with this level of sharpness, even the higher prices aren't unreasonable, but there's no reason to overpay when the cheaper listings exist. Compared to first-party Sony wide zooms, this Sigma undercuts them significantly while delivering comparable or better optical quality in a smaller package.

The Sigma 10-18mm f/2.8 DC DN Contemporary is an ultra wide-angle zoom built for APS-C mirrorless cameras, and it's one of the most interesting travel lenses we've tested in a while. On Sony E mount it gives you a 15-27mm full-frame equivalent field of view, which is wide enough for cramped interiors, big landscapes, and vlogging without turning your face into a funhouse mirror. At 260g and with a 67mm filter thread, it's genuinely tiny for what it does. The constant f/2.8 aperture is the headline feature here, and it's rare to see that in a lens this small and this affordable.

People searching for a lightweight wide-angle lens for Sony APS-C bodies will keep running into this Sigma. It's aimed squarely at travelers, vloggers, and real estate shooters who want sharp results without hauling around a heavy kit. The weather sealing is a nice touch too, with a rubber gasket at the mount to keep dust and light splashes out. Just don't confuse that with full waterproofing.

We've seen prices bounce around a lot on this one, from USD 540 up to USD 810 depending on the vendor, so it pays to shop around. For what it delivers optically, even the higher end of that range feels reasonable, but the lower end is a steal.

Skip this lens if you shoot on a camera body without IBIS and plan to do a lot of handheld video, because the lack of stabilization will frustrate you. Wildlife and sports shooters should also look elsewhere, since the 10-18mm range is far too wide for distant subjects and our data puts it at the 65.2/100 mark for that use case. If you need one lens that covers everything from wide to telephoto, the Sony E 18-135mm f/3.5-5.6 OSS is a better fit despite being slower. And if you're on full-frame, this isn't your lens at all, look at the Nikon Z 17-28mm f/2.8 or similar full-frame wide zooms instead.

Yes, you should buy this if you shoot Sony APS-C and want a wide-angle lens that won't weigh down your bag. The Sigma 10-18mm f/2.8 DC DN Contemporary nails the fundamentals: it's sharp, fast, tiny, and reasonably priced. The f/2.8 aperture means you can shoot interiors without a tripod and still get clean results, and the 15-27mm equivalent range covers everything from vlogging to vast landscapes. Owners consistently praise the build quality and portability, and our sentiment data backs that up with an 88/100 score.

The main reasons to hesitate are the lack of stabilization and the need to correct distortion and vignetting in post. If your camera body has IBIS, the first issue disappears. The second is just part of shooting ultra wide lenses, and most modern editing software handles it automatically. For the price, especially at the lower end of the USD 540 to USD 810 range, this is one of the easiest lens recommendations we can make for APS-C shooters.