The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 56mm F1.4 DC DN C 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 Sigma 56mm F1.4 DC DN C with a length of 60mm, is 29mm shorter. Besides being longer, the Samyang 50mm F1.4 FE II also has a larger diameter of 80mm compared to the Sigma 56mm F1.4 DC DN C's 67mm 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. Sigma 56mm F1.4 DC DN C weighs 280g, which means it is 140g (33%) lighter than the Samyang 50mm F1.4 FE II which has a weight of 420g.
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 Sigma 56mm F1.4 DC DN C has a filter size of 55mm 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 55mm filters that we recommend you to consider for the Sigma 56mm F1.4 DC DN C:
And these are the 72mm filters that we recommend for the Samyang 50mm F1.4 FE II:
Lens Mounts
Both the Sigma 56mm F1.4 DC DN C 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 A6700, Sony FX30 and Sony ZV-E10.
Sigma 56mm F1.4 DC DN C is also available in Micro Four Thirds and Leica L mounts.
Focal Range
Sigma 56mm F1.4 DC DN C is a prime lens with fixed focal lenght of 56mm which has an effective (full-frame 35mm equivalent) focal range of
84mm when used on a APS-C / DX format camera.
On the other hand, the Samyang 50mm F1.4 FE II is a prime lens with fixed focal lenght of 50mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 75mm.