The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 35mm F2 DG DN and the Leica Elmarit-TL 18mm F2.8 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 35mm F2 DG DN is the longer of the two lenses at 65mm. The Leica Elmarit-TL 18mm F2.8 ASPH with a length of 21mm, is 44mm shorter. Besides being longer, the Sigma 35mm F2 DG DN also has a larger diameter of 70mm compared to the Leica Elmarit-TL 18mm F2.8 ASPH's 61mm diameter.
Below you can find a scaled side-by-side image of Sigma 35mm F2 DG DN and Leica Elmarit-TL 18mm F2.8 ASPH to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 35mm F2 DG DN and the Leica Elmarit-TL 18mm F2.8 ASPH Size and Weight 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 Elmarit-TL 18mm F2.8 ASPH weighs 80g, 75% (245g) lighter than the Sigma 35mm F2 DG DN's weight of 325g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Leica L Mount for size comparison purposes.
Wideangle Leica L Mount
Filter Threads
The Sigma 35mm F2 DG DN has a filter size of 58mm whereas the Leica Elmarit-TL 18mm F2.8 ASPH has a 39mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 58mm filters that we recommend you to consider for the Sigma 35mm F2 DG DN:
And these are the 39mm filters that we recommend for the Leica Elmarit-TL 18mm F2.8 ASPH:
Lens Mounts
Both the Sigma 35mm F2 DG DN and the Leica Elmarit-TL 18mm F2.8 ASPH has the same Leica L lens mount . Some of the latest released cameras that are compatible with the Leica L lenses are Leica SL3-P , Panasonic S1 II and Panasonic S1 IIE .
Focal Range
Sigma 35mm F2 DG DN is a prime lens with fixed focal lenght of 35mm.
On the other hand, the Leica Elmarit-TL 18mm F2.8 ASPH is a prime lens with fixed focal lenght of 18mm which has an effective (full-frame 35mm equivalent) focal range of 27mm when used on a APS-C / DX format camera.
