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 Fujifilm 50-140mm F2.8 R OI 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 Fujifilm 50-140mm F2.8 R OI with a length of 176mm, is 21mm shorter. Besides being longer, the Sigma 100-400mm F5-6.3 OS also has a larger diameter of 86mm compared to the Fujifilm 50-140mm F2.8 R OI's 83mm diameter.
Below you can find a scaled side-by-side image of Sigma 100-400mm F5-6.3 OS and Fujifilm 50-140mm F2.8 R OI 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 Fujifilm 50-140mm F2.8 R OI 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. Fujifilm 50-140mm F2.8 R OI weighs 995g, 12% (140g) 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 Fujifilm 50-140mm F2.8 R OI 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 67mm filters that we recommend you to consider for the Sigma 100-400mm F5-6.3 OS:
And these are the 72mm filters that we recommend for the Fujifilm 50-140mm F2.8 R OI:
Lens Mounts
Both the Sigma 100-400mm F5-6.3 OS and the Fujifilm 50-140mm F2.8 R OI has the same Fujifilm X lens mount . Some of the latest released cameras that are compatible with the Fujifilm X lenses are Fujifilm X-T30 III , Fujifilm X-E5 and Fujifilm X-M5 .
Leica L and Sony E mounts.
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 Fujifilm 50-140mm F2.8 R OI has a focal range of 50-140mm and 2.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 75-210mm when used on a APS-C / DX format camera.
