The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Fujinon MK 50-135mm T2.9 and the Sony FE 100mm F2.8 STF GM 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. Fujinon MK 50-135mm T2.9 is the longer of the two lenses at 206mm. The Sony FE 100mm F2.8 STF GM with a length of 118mm, is 88mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 85mm.
Below you can find a scaled side-by-side image of Fujinon MK 50-135mm T2.9 and Sony FE 100mm F2.8 STF GM to get a better idea of how their sizes compare in real life.
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. Sony FE 100mm F2.8 STF GM weighs 700g, 28% (280g) lighter than the Fujinon MK 50-135mm T2.9's weight of 980g.
Both the Fujinon MK 50-135mm T2.9 and the Sony FE 100mm F2.8 STF GM has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A9 III, Sony A7C Mark II and Sony A7CR.
Fujinon MK 50-135mm T2.9 has a focal range of 50-135mm and 2.7X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 75 - 202.5mm.
Sony FE 100mm F2.8 STF GM is a prime lens with fixed focal lenght of 100mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 150mm.