The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Kamlan 28mm F1.4 and the Sigma 30mm F2.8 DN 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. Kamlan 28mm F1.4 is the longer of the two lenses at 65mm. The Sigma 30mm F2.8 DN with a length of 41mm, is 24mm shorter. On the other hand, the Sigma 30mm F2.8 DN has a larger diameter of 61mm compared to the Kamlan 28mm F1.4's 55mm 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 DN weighs 135g, 64% (249g) lighter than the Kamlan 28mm F1.4's weight of 384g.
Lens Mounts
Both the Kamlan 28mm F1.4 and the Sigma 30mm F2.8 DN has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony ZV-E10 II, Sony A6700 and Sony FX30.
Kamlan 28mm F1.4 is also available in the Canon EF-M , Fujifilm X and Micro Four Thirds mounts.
Sigma 30mm F2.8 DN is also available in Micro Four Thirds mount.
Focal Range
Kamlan 28mm F1.4 is a prime lens with fixed focal lenght of 28mm which has an effective (full-frame 35mm equivalent) focal range of
42mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 30mm F2.8 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.
