The type of photography that you are planning to use is an important decision factor. Here we have evaluated the 7artisans 35mm F2 and the Sigma 30mm F2.8 EX DN for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.7artisans 35mm F2 is the longer of the two lenses at 41mm. The Sigma 30mm F2.8 EX DN with a length of 39mm is 2mm shorter. On the other hand, the Sigma 30mm F2.8 EX DN has a larger diameter of 61mm compared to 7artisans 35mm F2's 50mm diameter.
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 F2.8 EX DN weighs 135g, 57% (185g) lighter than the 7artisans 35mm F2's weight of 320g.
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
Lens Mounts
Both 7artisans 35mm F2 and Sigma 30mm F2.8 EX DN has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX30, Sony ZV-E10 and Sony A6600.
7artisans 35mm F2 is also available in Canon EF-M and Fujifilm X mounts.
Sigma 30mm F2.8 EX DN is also available in Micro Four Thirds mount.
Focal Range
7artisans 35mm F2 is a prime lens with fixed focal lenght of 35mm which has an effective (full-frame 35mm equivalent) focal range of 52.5mm when used on a APS-C / DX format camera. Sigma 30mm F2.8 EX DN 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.