The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang AF 135mm F1.8 FE and the Sigma 85mm F1.4 DG DN 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. Samyang AF 135mm F1.8 FE is the longer of the two lenses at 130mm. The Sigma 85mm F1.4 DG DN with a length of 94mm, is 36mm shorter. Besides being longer, the Samyang AF 135mm F1.8 FE also has a larger diameter of 93mm compared to the Sigma 85mm F1.4 DG DN 's 83mm diameter.
Below you can find a scaled side-by-side image of Samyang AF 135mm F1.8 FE and Sigma 85mm F1.4 DG DN to get a better idea of how their sizes compare in real life.
Comparison image of the Samyang AF 135mm F1.8 FE and the Sigma 85mm F1.4 DG DN Size and Weight 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. Sigma 85mm F1.4 DG DN weighs 630g, 18% (142g) lighter than the Samyang AF 135mm F1.8 FE's weight of 772g.
Below you can find the dimension and weight table of the Telephoto Prime Lenses in Sony E Mount for size comparison purposes.
Telephoto Prime Lenses in Sony E Mount for Size Comparison
Lens Mounts
Both the Samyang AF 135mm F1.8 FE and the Sigma 85mm F1.4 DG DN has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A7R V, Sony FX30 and Sony A7 IV.
Focal Range
Samyang AF 135mm F1.8 FE is a prime lens with fixed focal lenght of 135mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 202.5mm.
Sigma 85mm F1.4 DG DN is a prime lens with fixed focal lenght of 85mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 127.5mm.