The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 23mm F1.4 DC DN C and the Leica Summicron-T 23mm f2 ASPH 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 23mm F1.4 DC DN C is the longer of the two lenses at 77mm. The Leica Summicron-T 23mm f2 ASPH with a length of 37mm, is 40mm shorter. Besides being longer, the Sigma 23mm F1.4 DC DN C also has a larger diameter of 66mm compared to the Leica Summicron-T 23mm f2 ASPH'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 Summicron-T 23mm f2 ASPH weighs 154g, 54% (186g) lighter than the Sigma 23mm F1.4 DC DN C's weight of 340g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Leica L Mount for size comparison purposes.
Wideangle Lenses in Leica L Mount for Size Comparison
Filter Threads
Both the Sigma 23mm F1.4 DC DN C and the Leica Summicron-T 23mm f2 ASPH 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 23mm F1.4 DC DN C and the Leica Summicron-T 23mm f2 ASPH 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 23mm F1.4 DC DN C is also available in the Sony E and Fujifilm X mounts.
Focal Range
Both lenses have the same focal range of
23mm but while Sigma 23mm F1.4 DC DN C has the fastest aperture of
F1.4, the Leica Summicron-T 23mm f2 ASPH's widest aperture value is
F2.0.
