Sigma's first 12-24mm ultra-wide — the original version covering the widest rectilinear range.
The Sigma 12-24mm f/4.5-5.6D EX DG HSM is the original first-generation version of Sigma's groundbreaking ultra-wide zoom for Nikon F mount. When released in 2003, it was the widest rectilinear zoom available for any full-frame system — 12mm on full frame providing 122 degrees of coverage. A pioneering lens that defined the ultra-wide zoom category.
Optical performance was impressive for a pioneering ultra-wide design. Centre sharpness is respectable. The 12mm wide end provides dramatic coverage. Distortion is well-controlled for the extreme focal length — far less than fisheye alternatives. The HSM motor provides fast, quiet AF. DG coatings optimise for digital sensors. The later Mark II (IDs 3426, 3705) improved optics.
Nikon F mount with D-type coupling. Bulbous front element — no front filters. Weight is approximately 600 grams. Build quality is solid EX professional grade. HSM motor. No image stabilisation. The first-generation design was revolutionary but has since been superseded by the Mark II and the 12-24mm f/4 Art with dramatically better optics.
Available at very low used prices. Check the bulbous front element for damage. The original version is thoroughly superseded — the Mark II and Art versions are significantly better. Only of interest at extremely low prices for budget ultra-wide work. A piece of lens design history that defined the ultra-wide zoom category.