The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 100-400mm F5-6.3 OS and the Sigma 24-70mm F2.8 II 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 100-400mm F5-6.3 OS is the longer of the two lenses at 197mm. The Sigma 24-70mm F2.8 II with a length of 122mm, is 75mm shorter. On the other hand, the Sigma 24-70mm F2.8 II has a larger diameter of 88mm compared to the Sigma 100-400mm F5-6.3 OS's 86mm diameter.
Below you can find a scaled side-by-side image of Sigma 100-400mm F5-6.3 OS and Sigma 24-70mm F2.8 II to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 100-400mm F5-6.3 OS and the Sigma 24-70mm F2.8 II 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, 35% (400g) lighter than the Sigma 100-400mm F5-6.3 OS's weight of 1135g.
Filter Threads
The Sigma 100-400mm F5-6.3 OS has a filter size of 67mm whereas the Sigma 24-70mm F2.8 II has a 82mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Sigma 100-400mm F5-6.3 OS:
And these are the 82mm filters that we recommend for the Sigma 24-70mm F2.8 II:
Lens Mounts
The Sigma 100-400mm F5-6.3 OS has the Fujifilm X lens mount whereas the Sigma 24-70mm F2.8 II has the Sony E lens mount . Some of the latest released cameras that are compatible with these mounts are Fujifilm X-T30 III , Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount and Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount.
Leica L and Sony E mounts.
Leica L mount.
Focal Range
Sigma 100-400mm F5-6.3 OS has a focal range of 100-400mm and
4.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
150 - 600mm .
On the other hand, the 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 .
