The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 70-200 F2.8 DG OS HSM S 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 70-200 F2.8 DG OS HSM S is the longer of the two lenses at 203mm. The Sigma 50-100mm F1.8 A with a length of 171mm, is 32mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 94mm.
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 50-100mm F1.8 A weighs 1490g, 17% (315g) lighter than the Sigma 70-200 F2.8 DG OS HSM S's weight of 1805g.
Below you can find the dimension and weight table of the Telephoto Zoom Lenses in Sigma SA Mount for size comparison purposes.
Telephoto Lenses in Sigma SA Mount for Size Comparison
Filter Threads
Both the Sigma 70-200 F2.8 DG OS HSM S 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 70-200 F2.8 DG OS HSM S 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 70-200 F2.8 DG OS HSM S is also available in the Canon EF and Nikon F (FX) mounts.
Sigma 50-100mm F1.8 A is also available in Canon EF and Nikon F (DX) mounts.
Focal Range
Sigma 70-200 F2.8 DG OS HSM S has a focal range of 70-200mm 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.
