The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 20mm F1.8 and the Voigtlander Nokton 25mm F0.95 Type II for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Samyang 20mm F1.8 is the longer of the two lenses at 88mm. The Voigtlander Nokton 25mm F0.95 Type II with a length of 70mm is 18mm shorter. Besides being longer, the Samyang 20mm F1.8 also has a larger diameter of 83mm compared to Voigtlander Nokton 25mm F0.95 Type II's 61mm diameter.
Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Voigtlander Nokton 25mm F0.95 Type II weighs 435g, 12% (62g) lighter than the Samyang 20mm F1.8's weight of 497g.
Below you can find the dimension and weight table of the 'Wideangle Prime Lenses in Micro Four Thirds Mount for size comparison purposes.
Wideangle Prime Lenses in Micro Four Thirds Mount for Size Comparison
Both Samyang 20mm F1.8 and Voigtlander Nokton 25mm F0.95 Type II has the same Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with the Micro Four Thirds lenses are OM System OM-5, Panasonic GH6 and OM System OM-1.
Samyang 20mm F1.8 is also available in Canon EF , Canon EF-M, Fujifilm X, Nikon F (FX), Pentax KAF, Samsung NX, Sony Alpha and Sony E mounts.
Samyang 20mm F1.8 is a prime lens with fixed focal lenght of 20mm. Voigtlander Nokton 25mm F0.95 Type II is a prime lens with fixed focal lenght of 25mm which has an effective (full-frame 35mm equivalent) focal range of 50mm when used on a FourThirds format camera.