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 135mm F1.8 ZA 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 135mm F1.8 ZA with a length of 115mm, is 7mm shorter. On the other hand, the Sony 135mm F1.8 ZA has a larger diameter of 89mm compared to the Samyang 135mm F2.0 ED UMC's 82mm diameter.
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. Samyang 135mm F2.0 ED UMC weighs 830g, which means it is 220g (20%) lighter than the Sony 135mm F1.8 ZA which has a weight of 1050g.
Filter Threads
Both the Samyang 135mm F2.0 ED UMC and the Sony 135mm F1.8 ZA have the same Filter thread size of 77mm.
Below are links to the 77mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Samyang 135mm F2.0 ED UMC has the Samsung NX lens mount whereas the Sony 135mm F1.8 ZA has the Sony Alpha lens mount. Some of the latest released cameras that are compatible with these mounts are Samsung NX500, Samsung NX1 and Samsung NX3000 for the Samsung NX Mount and Sony A99 II, Sony A68 and Sony A77 II for the Sony Alpha Mount.
Samyang 135mm F2.0 ED UMC is also available in Canon EF , Canon EF-M, Four Thirds, Fujifilm X, Micro Four Thirds, Nikon F (FX), Pentax KAF, Sony Alpha and Sony E mounts.
Focal Range
Both lenses have the same focal range of
135mm but while Samyang 135mm F2.0 ED UMC has the fastest aperture of
F2, the Sony 135mm F1.8 ZA's widest aperture value is
F1.8.