The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Pentax 12-24mm F4.0 ED AL and the Sigma 14-24mm F2.8 DG DN Art 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 14-24mm F2.8 DG DN Art is the longer of the two lenses at 131mm. The Pentax 12-24mm F4.0 ED AL with a length of 84mm, is 47mm shorter. On the other hand, the Pentax 12-24mm F4.0 ED AL has a larger diameter of 88mm compared to the Sigma 14-24mm F2.8 DG DN Art's 85mm diameter.
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. Pentax 12-24mm F4.0 ED AL weighs 430g, which means it is 365g (45%) lighter than the Sigma 14-24mm F2.8 DG DN Art which has a weight of 795g.
Lens Mounts
The Pentax 12-24mm F4.0 ED AL has the Pentax KAF lens mount whereas the Sigma 14-24mm F2.8 DG DN Art has the Leica L lens mount. Some of the latest released cameras that are compatible with these mounts are Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF Mount and Leica SL3-P, Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount.
Sigma 14-24mm F2.8 DG DN Art is also available in Sony E mount.
Focal Range
Pentax 12-24mm F4.0 ED AL has a focal range of 12-24mm and
2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
18-36mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 14-24mm F2.8 DG DN Art has a focal range of 14-24mm and 1.7X zoom ratio .
