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 DG 12mm F1.4 with a length of 70mm is 26mm shorter. Besides being longer, the Samyang MF 14mm F2.8 Mk2 also has a larger diameter of 87mm compared to Panasonic DG 12mm F1.4's 70mm 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 DG 12mm F1.4 weighs 335g, 93% (314g) 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 DG 12mm F1.4 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.
Samyang MF 14mm F2.8 Mk2 is a prime lens with fixed focal lenght of 14mm. Panasonic DG 12mm F1.4 is a prime lens with fixed focal lenght of 12mm which has a 35mm equivalent focal range of 28mm when used on a FourThirds format camera.