Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Samyang MF 14mm F2.8 Mk2 is the longer of the two lenses at 96mm. The Panasonic 14mm F2.5 II ASPH with a length of 21mm is 75mm shorter. Besides being longer, the Samyang MF 14mm F2.8 Mk2 also has a larger diameter of 87mm compared to Panasonic 14mm F2.5 II ASPH's 56mm 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. Panasonic 14mm F2.5 II ASPH weighs 55g, 1080% (594g) lighter than the Samyang MF 14mm F2.8 Mk2's weight of 649g.
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 MF 14mm F2.8 Mk2 and Panasonic 14mm F2.5 II ASPH 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.
Samyang MF 14mm F2.8 Mk2 is also available in Canon EF , Canon EF-M, Fujifilm X, Nikon F (FX) and Sony E mounts.