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 Voigtlander 21mm F1.8 Ultron 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 21mm F1.8 Ultron is the longer of the two lenses at 92mm. The Voigtlander 28mm F2 Ultron with a length of 51mm, is 41mm shorter. Besides being longer, the Voigtlander 21mm F1.8 Ultron also has a larger diameter of 62mm compared to the Voigtlander 28mm F2 Ultron'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. Voigtlander 28mm F2 Ultron weighs 244g, which means it is 168g (40%) lighter than the Voigtlander 21mm F1.8 Ultron which has a weight of 412g.
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 Voigtlander 21mm F1.8 Ultron has a 58mm 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 58mm filters that we recommend for the Voigtlander 21mm F1.8 Ultron:
Lens Mounts
Both the Voigtlander 28mm F2 Ultron and the Voigtlander 21mm F1.8 Ultron has the same Leica M lens mount. Some of the latest released cameras that are compatible with the Leica M lenses are Leica M EV1, Leica M11-D and Pixii Max.
Focal Range
Voigtlander 28mm F2 Ultron is a prime lens with fixed focal lenght of 28mm.
On the other hand, the Voigtlander 21mm F1.8 Ultron is a prime lens with fixed focal lenght of 21mm.
