The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 50mm F1.4 FE II and the Sigma 30mm F1.4 C 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 50mm F1.4 FE II is the longer of the two lenses at 89mm. The Sigma 30mm F1.4 C with a length of 73mm, is 16mm shorter. Besides being longer, the Samyang 50mm F1.4 FE II also has a larger diameter of 80mm compared to the Sigma 30mm F1.4 C's 65mm diameter.
Below you can find a scaled side-by-side image of Samyang 50mm F1.4 FE II and Sigma 30mm F1.4 C to get a better idea of how their sizes compare in real life.
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 30mm F1.4 C weighs 265g, 36% (155g) lighter than the Samyang 50mm F1.4 FE II's 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 Prime Lenses in Sony E Mount for Size Comparison
Both the Samyang 50mm F1.4 FE II and the Sigma 30mm F1.4 C has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony ZV-E1, Sony A7R V and Sony FX30.
Sigma 30mm F1.4 C is also available in Micro Four Thirds , Fujifilm X and Nikon Z mounts.
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.
Sigma 30mm F1.4 C is a prime lens with fixed focal lenght of 30mm which has an effective (full-frame 35mm equivalent) focal range of 45mm when used on a APS-C / DX format camera.