The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang AF 50mm F1.4 FE and the Sigma 30mm F1.4 C 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 AF 50mm F1.4 FE is the longer of the two lenses at 98mm. The Sigma 30mm F1.4 C with a length of 73mm, is 25mm shorter. Besides being longer, the Samyang AF 50mm F1.4 FE also has a larger diameter of 74mm compared to the Sigma 30mm F1.4 C's 65mm diameter.
ss
Below you can find a scaled side-by-side image of Samyang AF 50mm F1.4 FE 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 equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Sigma 30mm F1.4 C weighs 265g, 54% (320g) lighter than the Samyang AF 50mm F1.4 FE's weight of 585g.
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 AF 50mm F1.4 FE has a filter size of 67mm whereas the Sigma 30mm F1.4 C has a 52mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Samyang AF 50mm F1.4 FE:
And these are the 52mm filters that we recommend for the Sigma 30mm F1.4 C:
Lens Mounts
Both the Samyang AF 50mm F1.4 FE 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 A9 III, Sony A7C Mark II and Sony A7CR.
Sigma 30mm F1.4 C is also available in Micro Four Thirds , Fujifilm X and Nikon Z mounts.
Focal Range
Samyang AF 50mm F1.4 FE 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.
On the other hand, the 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.