Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Voigtlander Nokton 25mm F0.95 Type II is the longer of the two lenses at 70mm. The Kamlan 28mm F1.4 with a length of 65mm is 5mm shorter. Besides being longer, the Voigtlander Nokton 25mm F0.95 Type II also has a larger diameter of 61mm compared to Kamlan 28mm F1.4's 55mm 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. Kamlan 28mm F1.4 weighs 384g, which means it is 51g (13%) lighter than the Voigtlander Nokton 25mm F0.95 Type II which has a weight of 435g.
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 Kamlan 28mm F1.4 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 Panasonic GH6, OM System OM-1 and Panasonic GH5 II.
Kamlan 28mm F1.4 is also available in Canon EF-M , Fujifilm X and Sony E mounts.
Kamlan 28mm F1.4 is a prime lens with fixed focal lenght of 28mm which has a 35mm equivalent focal range of 56mm when used on a APS-C / DX format camera. Voigtlander Nokton 25mm F0.95 Type II is a prime lens with fixed focal lenght of 25mm which has a 35mm equivalent focal range of 56mm when used on a FourThirds format camera.