The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Kamlan 50mm F1.1 II and the Sigma 45mm F2.8 DG DN C for their suitability to various photography scenarios:
Size and Weight Comparison
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 45mm F2.8 DG DN C weighs 215g, 64% (385g) lighter than the Kamlan 50mm F1.1 II's weight of 600g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Sony E Mount for size comparison purposes.
Standard Lenses in Sony E Mount for Size Comparison
Filter Threads
The Kamlan 50mm F1.1 II has a filter size of 62mm whereas the Sigma 45mm F2.8 DG DN C has a 55mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Kamlan 50mm F1.1 II:
And these are the 55mm filters that we recommend for the Sigma 45mm F2.8 DG DN C:
Lens Mounts
Both the Kamlan 50mm F1.1 II and the Sigma 45mm F2.8 DG DN C 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 50mm F1.1 II is also available in the Canon EF-M , Fujifilm X and Micro Four Thirds mounts.
Sigma 45mm F2.8 DG DN C is also available in Leica L mount.
Focal Range
Kamlan 50mm F1.1 II is a prime lens with fixed focal lenght of 50mm which has an effective (full-frame 35mm equivalent) focal range of
75mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 45mm F2.8 DG DN C is a prime lens with fixed focal lenght of 45mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 67.5mm.
