The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 50-100mm F1.8 A and the Sigma 70-200mm F2.8 EX DG HSM II for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Sigma 70-200mm F2.8 EX DG HSM II is the longer of the two lenses at 184mm. The Sigma 50-100mm F1.8 A with a length of 171mm, is 13mm shorter. On the other hand, the Sigma 50-100mm F1.8 A has a larger diameter of 94mm compared to the Sigma 70-200mm F2.8 EX DG HSM II's 87mm diameter.
The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Sigma 70-200mm F2.8 EX DG HSM II weighs 1390g, 6% (100g) lighter than the Sigma 50-100mm F1.8 A's weight of 1490g.
Below you can find the dimension and weight table of the Telephoto Zoom Lenses in Sigma SA Mount for size comparison purposes.
Telephoto Zoom Lenses in Sigma SA Mount for Size Comparison
Both the Sigma 50-100mm F1.8 A and the Sigma 70-200mm F2.8 EX DG HSM II has the same Sigma SA lens mount. Some of the latest released cameras that are compatible with the Sigma SA lenses are Sigma SD1 Merrill, Sigma SD1 and .
Sigma 50-100mm F1.8 A is also available in Canon EF and Nikon F (DX) mounts.
Sigma 70-200mm F2.8 EX DG HSM II is also available in Canon EF , Four Thirds, Pentax KAF3, Sony Alpha and Nikon F (FX) mounts.
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. Sigma 70-200mm F2.8 EX DG HSM II has a focal range of 70-200mm and 2.9X zoom ratio .