The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 85mm F1.4 GM II and the Samyang 50mm F1.2 AS UMC CS 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. Sony FE 85mm F1.4 GM II is the longer of the two lenses at 107mm. The Samyang 50mm F1.2 AS UMC CS with a length of 74mm, is 33mm shorter. Besides being longer, the Sony FE 85mm F1.4 GM II also has a larger diameter of 85mm compared to the Samyang 50mm F1.2 AS UMC CS's 68mm diameter.
Below you can find a scaled side-by-side image of Sony FE 85mm F1.4 GM II and Samyang 50mm F1.2 AS UMC CS to get a better idea of how their sizes compare in real life.
Comparison image of the Sony FE 85mm F1.4 GM II and the Samyang 50mm F1.2 AS UMC CS 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. Samyang 50mm F1.2 AS UMC CS weighs 375g, 41% (267g) lighter than the Sony FE 85mm F1.4 GM II's weight of 642g.
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 Sony FE 85mm F1.4 GM II has a filter size of 77mm whereas the Samyang 50mm F1.2 AS UMC CS has a 62mm 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 Sony FE 85mm F1.4 GM II:
And these are the 62mm filters that we recommend for the Samyang 50mm F1.2 AS UMC CS:
Lens Mounts
Both the Sony FE 85mm F1.4 GM II and the Samyang 50mm F1.2 AS UMC CS 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-M , Fujifilm X and Micro Four Thirds mounts.
Focal Range
Sony FE 85mm F1.4 GM II 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 .
On the other hand, the Samyang 50mm F1.2 AS UMC CS is a prime lens with fixed focal lenght of 50mm which has an effective (full-frame 35mm equivalent) focal range of 75mm when used on a APS-C / DX format camera.
