The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony E 50mm F1.8 OSS and the Sigma 56mm F1.4 DC DN 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. Sony E 50mm F1.8 OSS is the longer of the two lenses at 62mm. The Sigma 56mm F1.4 DC DN C with a length of 60mm, is 2mm shorter. On the other hand, the Sigma 56mm F1.4 DC DN C has a larger diameter of 67mm compared to the Sony E 50mm F1.8 OSS's 62mm 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. Sony E 50mm F1.8 OSS weighs 202g, which means it is 78g (27%) lighter than the Sigma 56mm F1.4 DC DN C which has a weight of 280g.
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 Sony E 50mm F1.8 OSS has a filter size of 49mm whereas the Sigma 56mm F1.4 DC DN C has a 55mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 49mm filters that we recommend you to consider for the Sony E 50mm F1.8 OSS:
And these are the 55mm filters that we recommend for the Sigma 56mm F1.4 DC DN C:
Lens Mounts
Both the Sony E 50mm F1.8 OSS and the Sigma 56mm F1.4 DC DN C 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
Sony E 50mm F1.8 OSS 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.
On the other hand, the 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.