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 Leica 18-56mm f3.5-5.6 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 30mm F1.4 C is the longer of the two lenses at 73mm. The Leica 18-56mm f3.5-5.6 with a length of 60mm, is 13mm shorter. Besides being longer, the Sigma 30mm F1.4 C also has a larger diameter of 65mm compared to the Leica 18-56mm f3.5-5.6's 63mm 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. Leica 18-56mm f3.5-5.6 weighs 256g, 3% (9g) lighter than the Sigma 30mm F1.4 C's weight of 265g.
Filter Threads
Both the Sigma 30mm F1.4 C and the Leica 18-56mm f3.5-5.6 have the same Filter thread size of 52mm.
Below are links to the 52mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Sigma 30mm F1.4 C and the Leica 18-56mm f3.5-5.6 has the same Leica L lens mount. Some of the latest released cameras that are compatible with the Leica L lenses are Leica TL2, Leica TL and Leica T Typ 701.
Sigma 30mm F1.4 C is also available in the Sony E , Micro Four Thirds, Fujifilm X, Nikon Z and Canon RF mounts.
Focal Range
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.
On the other hand, the Leica 18-56mm f3.5-5.6 has a focal range of 18-56mm and 3.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-84mm when used on a APS-C / DX format camera.
