The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 28-105mm f2.8 and the Sony FE 70-200mm F4 G OSS 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 28-105mm f2.8 is the longer of the two lenses at 158mm. The Sony FE 70-200mm F4 G OSS II with a length of 149mm, is 9mm shorter. Besides being longer, the Sigma 28-105mm f2.8 also has a larger diameter of 88mm compared to the Sony FE 70-200mm F4 G OSS II's 82mm diameter.
Below you can find a scaled side-by-side image of Sigma 28-105mm f2.8 and Sony FE 70-200mm F4 G OSS II to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 28-105mm f2.8 and the Sony FE 70-200mm F4 G OSS 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. Sony FE 70-200mm F4 G OSS II weighs 794g, 20% (201g) lighter than the Sigma 28-105mm f2.8's weight of 995g.
Filter Threads
The Sigma 28-105mm f2.8 has a filter size of 82mm whereas the Sony FE 70-200mm F4 G OSS II has a 72mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 82mm filters that we recommend you to consider for the Sigma 28-105mm f2.8:
And these are the 72mm filters that we recommend for the Sony FE 70-200mm F4 G OSS II:
Lens Mounts
Both the Sigma 28-105mm f2.8 and the Sony FE 70-200mm F4 G OSS II has the same Sony E lens mount . Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX5 , Sony A7R VI and Sony A7 V .
Sigma 28-105mm f2.8 is also available in the Leica L mount.
Focal Range
Sigma 28-105mm f2.8 has a focal range of 28-105mm and
3.8X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
42 - 157.5mm .
On the other hand, the Sony FE 70-200mm F4 G OSS II has a focal range of 70-200mm 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 105 - 300mm .