The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 24mm F1.4 DG DN A and the Kamlan 28mm F1.4 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. Sigma 24mm F1.4 DG DN A is the longer of the two lenses at 96mm. The Kamlan 28mm F1.4 with a length of 65mm, is 31mm shorter. Besides being longer, the Sigma 24mm F1.4 DG DN A also has a larger diameter of 76mm 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. Kamlan 28mm F1.4 weighs 384g, 26% (136g) lighter than the Sigma 24mm F1.4 DG DN A's weight of 520g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Sony E Mount for size comparison purposes.
Wideangle Lenses in Sony E Mount for Size Comparison
Filter Threads
The Sigma 24mm F1.4 DG DN A has a filter size of 72mm whereas the Kamlan 28mm F1.4 has a 52mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 72mm filters that we recommend you to consider for the Sigma 24mm F1.4 DG DN A:
And these are the 52mm filters that we recommend for the Kamlan 28mm F1.4:
Lens Mounts
Both the Sigma 24mm F1.4 DG DN A and the Kamlan 28mm F1.4 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A9 III, Sony A7C Mark II and Sony A7CR.
Sigma 24mm F1.4 DG DN A is also available in Leica L mount.
Kamlan 28mm F1.4 is also available in Canon EF-M , Fujifilm X and Micro Four Thirds mounts.
Focal Range
Sigma 24mm F1.4 DG DN A is a prime lens with fixed focal lenght of 24mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
36mm.
On the other hand, the 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.