The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 50mm F1.4 AS UMC and the Samyang 50mm F1.4 FE II 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 50mm F1.4 FE II is the longer of the two lenses at 89mm. The Samyang 50mm F1.4 AS UMC with a length of 75mm, is 14mm shorter. On the other hand, the Samyang 50mm F1.4 AS UMC has a larger diameter of 82mm compared to the Samyang 50mm F1.4 FE II's 80mm diameter.
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Below you can find a scaled side-by-side image of Samyang 50mm F1.4 AS UMC and Samyang 50mm F1.4 FE II to get a better idea of how their sizes compare in real life.
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 F1.4 FE II weighs 420g, 21% (115g) lighter than the Samyang 50mm F1.4 AS UMC's weight of 535g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Sony E Mount for size comparison purposes.
Standard Lenses in Sony E Mount for Size Comparison
Filter Threads
The Samyang 50mm F1.4 AS UMC has a filter size of 77mm whereas the Samyang 50mm F1.4 FE II 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 50mm F1.4 AS UMC:
And these are the 72mm filters that we recommend for the Samyang 50mm F1.4 FE II:
Lens Mounts
Both the Samyang 50mm F1.4 AS UMC and the Samyang 50mm F1.4 FE II 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.
Samyang 50mm F1.4 AS UMC is also available in Canon EF , Nikon F (FX), Pentax KAF and Sony Alpha mounts.
Focal Range
Both lenses have the same focal range of
50mm and the fastest aperture of
F1.4.