The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 12-24mm F4 DG HSM and the Sigma 20mm F1.4 DG HSM A for their suitability to various photography scenarios:

#### Size and Weight Comparison

The size of a lens is a crucial factor to consider when comparing two lenses. Sigma 12-24mm F4 DG HSM is the longer of the two lenses at 132mm. The Sigma 20mm F1.4 DG HSM A with a length of 130mm, is **2mm** shorter. Besides being longer, the Sigma 12-24mm F4 DG HSM also has a larger diameter of 101mm compared to the Sigma 20mm F1.4 DG HSM A's 91mm diameter.

Below you can find a scaled side-by-side image of Sigma 12-24mm F4 DG HSM and Sigma 20mm F1.4 DG HSM A to get a better idea of how their sizes compare in real life.

The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Sigma 20mm F1.4 DG HSM A weighs 950g, 17% (201g) lighter than the Sigma 12-24mm F4 DG HSM's weight of 1151g.

#### Lens Mounts

Both the Sigma 12-24mm F4 DG HSM and the Sigma 20mm F1.4 DG HSM A has the same Sigma SA lens mount. Some of the latest released cameras that are compatible with the Sigma SA lenses are Sigma Quattro, Sigma Quattro H and Sigma SD1 Merrill.

Sigma 12-24mm F4 DG HSM is also available in Nikon F (FX) and Canon EF mounts.

Sigma 20mm F1.4 DG HSM A is also available in Canon EF , Nikon F (FX) and Leica L mounts.

#### Focal Range

Sigma 12-24mm F4 DG HSM has a focal range of 12-24mm and

2.0X zoom ratio .

On the other hand, the Sigma 20mm F1.4 DG HSM A is a prime lens with fixed focal lenght of 20mm.