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 II 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 II with a length of 122mm, is 49mm 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 II's 88mm diameter.
Below you can find a scaled side-by-side image of Sigma 24-70mm F2.8 II and Sigma 50-100mm F1.8 A to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 24-70mm F2.8 II and the Sigma 50-100mm F1.8 A Size and Weight 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 II weighs 735g, which means it is 755g (50%) lighter than the Sigma 50-100mm F1.8 A which has a weight of 1490g.
Filter Threads
Both the Sigma 24-70mm F2.8 II 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
The Sigma 24-70mm F2.8 II has the Sony E lens mount whereas the Sigma 50-100mm F1.8 A has the Canon EF lens mount . Some of the latest released cameras that are compatible with these mounts are Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount and Canon T8i , Canon 90D and Canon SL3 for the Canon EF Mount.
Nikon F (DX) and Sigma SA mounts.
Focal Range
Sigma 24-70mm F2.8 II has a focal range of 24-70mm and
2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
36 - 105mm .
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 80-160mm when used on a APS-C / DX format camera.
