Sigma EX DG 200205 12-24mm

The Sigma 12-24mm f/4.5-5.6 EX DG is an optical overachiever with a 95th percentile score and a genuinely ultra-wide 122-degree view on full-frame. Build quality is its Achilles heel at the 17th percentile, and the slow aperture limits low-light work. US prices range from USD 629 to USD 996, with Newegg offering the best deal. If you're a Nikon F shooter who wants maximum width without maximum spend, this is worth a serious look.

The headline number here is the 95th percentile optical score, and it's earned. Four SLD glass elements and three aspherical elements (two glass-molded, one hybrid) do serious work keeping chromatic aberration and distortion in check. At 12mm, barrel distortion is present but far better controlled than you'd expect from an ultra-wide this old. The Super Multi Coating helps with flare and ghosting, though shooting directly into the sun will still produce some artifacts, especially at the wide end.

Real-world sharpness is strong in the center from f/5.6 onward, with corners that need stopping down to f/8 or f/11 to really clean up. That's typical for ultra-wides, but worth knowing if you pixel-peep. The minimum focus distance of 280mm (about 11 inches) gives you decent close-up flexibility, and the macro score of 74.4 out of 100 reflects that. It's not a true macro lens, but you can get some fun exaggerated-perspective close shots. The stabilization score lands in the 82nd percentile, which helps when handholding at slower shutter speeds, though it's not going to save you in truly dim conditions.

The most direct competitor in spirit is the Nikon NIKKOR Z 17-28mm f/2.8, but that's a newer mirrorless lens with a faster aperture and a much higher price tag. You're also not getting to 12mm, which is a huge difference in field of view. The Sigma's 122 degrees at 12mm versus the Nikon's roughly 104 degrees at 17mm is the difference between "wow, that's wide" and "wow, I can see my own ears." If you're on Nikon F and want maximum width, the Sigma wins by default.

The Viltrox AF 13mm F1.4 XF is an interesting alternative for APS-C shooters. It's faster at f/1.4 and sharper in the corners wide open, but it's not full-frame and it's a prime, not a zoom. The Tamron Di III VC 28-300mm f/4-7.1 is a completely different beast, a superzoom for travel, and it trades all that wide-angle goodness for reach. The Sony E 18-135mm f/3.5-5.6 OSS is similarly a general-purpose option that doesn't compete on width. If you specifically need 12mm on full-frame, the Sigma's real competition is mostly other Sigma and older Tokina ultra-wides, and this one holds up well against them optically.

Here's where things get interesting. US pricing runs from USD 629 to USD 996 across six listings, which is a massive spread for the same lens. Newegg has the best deal at the low end, and if you can snag one around USD 629, the value proposition is genuinely compelling. At the high end near a grand, you're getting into territory where newer options start looking tempting, especially if you're willing to adapt or switch mounts.

The budget score of 67.2 out of 100 reflects that this lens is a value play, but not a slam dunk at every price point. On the used market, you can often find these for significantly less, and that's where the real bargain lies. For full-frame Nikon F shooters who can't justify the cost of something like the Nikon 14-24mm f/2.8, this Sigma delivers most of the wide-angle drama at a fraction of the cost. Just be aware that the CAD 1,250 and JPY 183,557 listings are in their own currencies and not directly comparable to the US prices.

The Sigma 12-24mm f/4.5-5.6 EX DG is one of those lenses that carved out a niche simply by existing. Back when full-frame ultra-wide zooms were rare and eye-wateringly expensive, Sigma showed up with a 122-degree field of view at 12mm and a price that didn't require selling a kidney. It's an older design now, but for Nikon F shooters who want to go seriously wide without dropping four figures, it still holds a certain appeal. The optical performance lands in the 95th percentile in our database, which is frankly surprising for a lens this old and this affordable on the used market.

Who's this for? Landscape shooters, architecture nerds, and anyone who loves that dramatic, stretched perspective you only get at 12mm on full-frame. It's also a solid pick for astrophotography, though the f/4.5-5.6 aperture means you'll be cranking ISO or exposure time more than you would with a faster prime. The HSM autofocus motor is quiet and reasonably quick, and full-time manual focus override is a nice touch for fine-tuning critical shots.

The catch? Build quality sits at the 17th percentile, which is rough. No weather sealing, a plastic-heavy construction, and a bulbous front element that can't take standard screw-on filters. But if you treat it with a bit of care, the images it produces can absolutely hang with lenses costing twice as much. It's a classic case of optical brilliance wrapped in a budget body.

If you shoot in wet, dusty, or rough conditions, this lens is not for you. The 17th percentile build quality and complete lack of weather sealing mean one bad day outdoors could end badly. Look at weather-sealed alternatives like the Nikon 14-24mm f/2.8 if you need durability, though you'll pay significantly more. Similarly, if you shoot events or anything requiring fast autofocus and a brighter aperture, the f/4.5-5.6 maximum aperture and average AF performance will frustrate you. A faster ultra-wide prime or a modern f/2.8 zoom is the better call there. And if you're on a mirrorless system, this lens requires an adapter and you'd likely be better served by native glass designed for your mount.

For landscape and architecture shooters on Nikon F who want the widest possible full-frame view without spending a fortune, this Sigma is still a strong recommendation, especially if you can find it at the lower end of that USD 629 to USD 996 range. The optical quality is genuinely excellent, and the 12mm focal length opens up creative possibilities that simply don't exist with 16mm or 17mm alternatives. Just accept that you're getting a plastic body with no weather sealing and a slow aperture.

For astrophotography, the f/4.5-5.6 aperture is a real limitation. You'll be pushing ISO higher and exposures longer than you would with an f/2.8 or faster lens, which means more noise and more star trailing unless you're on a tracker. If astro is your primary use case, look at a fast prime like the Viltrox 13mm f/1.4 or save up for a faster ultra-wide zoom. For everyone else who just wants to go absurdly wide on a budget, this lens delivers where it counts.