The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 24-70mm F2.8 DG OS HSM and the Sigma 50-100mm F1.8 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 50-100mm F1.8 A is the longer of the two lenses at 171mm. The Sigma 24-70mm F2.8 DG OS HSM with a length of 108mm, is 63mm shorter. Besides being longer, the Sigma 50-100mm F1.8 A also has a larger diameter of 94mm compared to the Sigma 24-70mm F2.8 DG OS HSM's 88mm 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. Sigma 24-70mm F2.8 DG OS HSM weighs 1020g, which means it is 470g (31%) lighter than the Sigma 50-100mm F1.8 A which has a weight of 1490g.
Filter Threads
Both the Sigma 24-70mm F2.8 DG OS HSM and the Sigma 50-100mm F1.8 A have the same Filter thread size of 82mm.
Below are links to the 82mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Sigma 24-70mm F2.8 DG OS HSM and the Sigma 50-100mm F1.8 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 24-70mm F2.8 DG OS HSM is also available in the Nikon F (FX) and Canon EF mounts.
Sigma 50-100mm F1.8 A is also available in Canon EF and Nikon F (DX) mounts.
Focal Range
Sigma 24-70mm F2.8 DG OS HSM has a focal range of 24-70mm and
2.9X zoom ratio .
On the other hand, the Sigma 50-100mm F1.8 A has a focal range of 50-100mm and 2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 75-150mm when used on a APS-C / DX format camera.
