The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica Summicron-T 23mm f2 ASPH and the Voigtlander 25mm F4 Color Skopar 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 Voigtlander 25mm F4 Color Skopar with a length of 30mm, is 7mm shorter. Besides being longer, the Leica Summicron-T 23mm f2 ASPH also has a larger diameter of 63mm compared to the Voigtlander 25mm F4 Color Skopar's 55mm 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, which means it is 2g (1%) lighter than the Voigtlander 25mm F4 Color Skopar which has a weight of 156g.
Filter Threads
The Leica Summicron-T 23mm f2 ASPH has a filter size of 52mm whereas the Voigtlander 25mm F4 Color Skopar 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 52mm filters that we recommend you to consider for the Leica Summicron-T 23mm f2 ASPH:
And these are the 39mm filters that we recommend for the Voigtlander 25mm F4 Color Skopar:
Lens Mounts
The Leica Summicron-T 23mm f2 ASPH has the Leica T lens mount whereas the Voigtlander 25mm F4 Color Skopar has the Leica M lens mount. Some of the latest released cameras that are compatible with these mounts are , and for the Leica T Mount and Leica M11 Monochrome, Leica M11 and Leica M10 for the Leica M Mount.
Focal Range
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.
On the other hand, the Voigtlander 25mm F4 Color Skopar is a prime lens with fixed focal lenght of 25mm.