The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 30mm F2.8 EX DN and the Sony FE 28mm F2 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 FE 28mm F2 is the longer of the two lenses at 60mm. The Sigma 30mm F2.8 EX DN with a length of 39mm, is 21mm shorter. Besides being longer, the Sony FE 28mm F2 also has a larger diameter of 64mm compared to the Sigma 30mm F2.8 EX DN's 61mm 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 30mm F2.8 EX DN weighs 135g, which means it is 65g (32%) lighter than the Sony FE 28mm F2 which has a weight of 200g.
Filter Threads
The Sigma 30mm F2.8 EX DN has a filter size of 46mm whereas the Sony FE 28mm F2 has a 49mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 46mm filters that we recommend you to consider for the Sigma 30mm F2.8 EX DN:
And these are the 49mm filters that we recommend for the Sony FE 28mm F2:
Lens Mounts
Both the Sigma 30mm F2.8 EX DN and the Sony FE 28mm F2 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 30mm F2.8 EX DN is also available in Micro Four Thirds mount.
Focal Range
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.
On the other hand, the Sony FE 28mm F2 is a prime lens with fixed focal lenght of 28mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42mm.