The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica Elmarit-TL 18mm F2.8 ASPH 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. Leica Summicron-T 23mm f2 ASPH is the longer of the two lenses at 37mm. The Leica Elmarit-TL 18mm F2.8 ASPH with a length of 21mm, is 16mm shorter. Besides being longer, the Leica Summicron-T 23mm f2 ASPH also has a larger diameter of 63mm compared to the Leica Elmarit-TL 18mm F2.8 ASPH's 61mm 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 Elmarit-TL 18mm F2.8 ASPH weighs 80g, which means it is 74g (48%) lighter than the Leica Summicron-T 23mm f2 ASPH which has a weight of 154g.
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
The Leica Elmarit-TL 18mm F2.8 ASPH has a filter size of 39mm whereas the Leica Summicron-T 23mm f2 ASPH 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 39mm filters that we recommend you to consider for the Leica Elmarit-TL 18mm F2.8 ASPH:
And these are the 52mm filters that we recommend for the Leica Summicron-T 23mm f2 ASPH:
Lens Mounts
Both the Leica Elmarit-TL 18mm F2.8 ASPH 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.
Focal Range
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.
On the other hand, the Leica Summicron-T 23mm f2 ASPH is a prime lens with fixed focal lenght of 23mm which has an effective (full-frame 35mm equivalent) focal range of 34.5mm when used on a APS-C / DX format camera.
