The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 135mm F2.0 ED UMC 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 a crucial factor to consider when comparing two lenses. Samyang 135mm F2.0 ED UMC is the longer of the two lenses at 122mm. The Sony FE 100mm F2.8 STF GM with a length of 118mm, is 4mm shorter. On the other hand, the Sony FE 100mm F2.8 STF GM has a larger diameter of 85mm compared to the Samyang 135mm F2.0 ED UMC's 82mm diameter.
Below you can find a scaled side-by-side image of Samyang 135mm F2.0 ED UMC and Sony FE 100mm F2.8 STF GM to get a better idea of how their sizes compare in real life.
Comparison image of the Samyang 135mm F2.0 ED UMC and the Sony FE 100mm F2.8 STF GM 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 100mm F2.8 STF GM weighs 700g, 15% (130g) lighter than the Samyang 135mm F2.0 ED UMC's weight of 830g.
Below you can find the dimension and weight table of the Telephoto Prime Lenses in Sony E Mount for size comparison purposes.
Telephoto Sony E Mount
Filter Threads
The Samyang 135mm F2.0 ED UMC has a filter size of 77mm whereas the Sony FE 100mm F2.8 STF GM 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 77mm filters that we recommend you to consider for the Samyang 135mm F2.0 ED UMC:
And these are the 72mm filters that we recommend for the Sony FE 100mm F2.8 STF GM:
Lens Mounts
Both the Samyang 135mm F2.0 ED UMC 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 FX5 , Sony A7R VI and Sony A7 V .
Canon EF , Canon EF-M , Four Thirds , Fujifilm X , Micro Four Thirds , Nikon F (FX) , Pentax KAF , Samsung NX and Sony Alpha mounts.
Focal Range
Samyang 135mm F2.0 ED UMC is a prime lens with fixed focal lenght of 135mm.
On the other hand, the 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 .
