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 F1.4 C 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, 30% (119g) lighter than the Kamlan 28mm F1.4's weight of 384g.
Both Kamlan 28mm F1.4 and Sigma 30mm F1.4 C has the same Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with the Micro Four Thirds lenses are OM System OM-5, Panasonic GH6 and OM System OM-1.
Kamlan 28mm F1.4 is also available in Canon EF-M , Fujifilm X and Sony E mounts.
Sigma 30mm F1.4 C is also available in Sony E and Fujifilm X mounts.
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 56mm when used on a APS-C / DX format camera. Sigma 30mm F1.4 C 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.