The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 30mm F1.4 C and the Kamlan 28mm F1.4 for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Sigma 30mm F1.4 C is the longer of the two lenses at 73mm. The Kamlan 28mm F1.4 with a length of 65mm is 8mm shorter. Besides being longer, the Sigma 30mm F1.4 C also has a larger diameter of 65mm compared to Kamlan 28mm F1.4's 55mm 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 F1.4 C weighs 265g, which means it is 119g (30%) lighter than the Kamlan 28mm F1.4 which has a weight of 384g.
Both Sigma 30mm F1.4 C and Kamlan 28mm F1.4 has the same Fujifilm X lens mount. Some of the latest released cameras that are compatible with the Fujifilm X lenses are Fujifilm X-T5, Fujifilm X-H2 and Fujifilm X-H2S.
Sigma 30mm F1.4 C is also available in Sony E and Micro Four Thirds mounts.
Kamlan 28mm F1.4 is also available in Canon EF-M , Micro Four Thirds and Sony E mounts.
Sigma 30mm F1.4 C is a prime lens with fixed focal lenght of 30mm which has a 35mm equivalent focal range of 45mm when used on a APS-C / DX format camera. Kamlan 28mm F1.4 is a prime lens with fixed focal lenght of 28mm which has a 35mm equivalent focal range of 45mm when used on a APS-C / DX format camera.