The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander 28mm F2 Ultron and the Leica Summaron-M 28mm F5.6 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. Voigtlander 28mm F2 Ultron is the longer of the two lenses at 51mm. The Leica Summaron-M 28mm F5.6 with a length of 18mm, is 33mm shorter. Besides being longer, the Voigtlander 28mm F2 Ultron also has a larger diameter of 55mm compared to the Leica Summaron-M 28mm F5.6's 51mm 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 Summaron-M 28mm F5.6 weighs 165g, 32% (79g) lighter than the Voigtlander 28mm F2 Ultron's weight of 244g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Leica M Mount for size comparison purposes.
Wideangle Lenses in Leica M Mount for Size Comparison
Filter Threads
The Voigtlander 28mm F2 Ultron has a filter size of 46mm whereas the Leica Summaron-M 28mm F5.6 has a 34mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 46mm filters that we recommend you to consider for the Voigtlander 28mm F2 Ultron:
And these are the 34mm filters that we recommend for the Leica Summaron-M 28mm F5.6:
Lens Mounts
Both the Voigtlander 28mm F2 Ultron and the Leica Summaron-M 28mm F5.6 has the same Leica M lens mount. Some of the latest released cameras that are compatible with the Leica M lenses are Leica M11 Monochrome, Leica M11 and Leica M10.
Focal Range
Both lenses have the same focal range of
28mm but while Voigtlander 28mm F2 Ultron has the fastest aperture of
F2.0, the Leica Summaron-M 28mm F5.6's widest aperture value is
F5.6.