Sigma's second-generation ultra-wide full-frame zoom covering a dramatic 12-24mm range.
The Sigma 12-24mm f/4.5-5.6 II DG HSM was released around 2011 as the second generation of Sigma's groundbreaking ultra-wide zoom. At 12mm on full frame, it offers one of the widest rectilinear fields of view available in any interchangeable lens, making it invaluable for architecture, interiors, and dramatic landscape perspectives.
Sharpness is good in the centre throughout the range and respectable in the corners when stopped down. The ultra-wide 12mm end inevitably shows some softness at the extreme edges. Distortion is impressively well-controlled for such an extreme focal length — far less than fisheye alternatives. Flare can be an issue shooting into strong light sources.
Available in Nikon F and Canon EF mounts. The bulbous front element means no front filter thread — this is inherent to the ultra-wide design. Weight is approximately 670 grams. HSM motor provides fast, quiet autofocus. Build quality is solid. The later Sigma 12-24mm f/4 Art replaced this lens with significantly better optics.
Available on the used market at reasonable prices, especially since the Art version superseded it. Check the front element carefully for scratches — its exposed position makes it vulnerable. The Sigma 12-24mm f/4 Art is the clear upgrade if budget allows, but this version remains a capable and more affordable ultra-wide option.