Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Fujifilm GF 45mm F2.8 R WR is the longer of the two lenses at 88mm. The Fujifilm GF 50mm F3.5 R LM WR with a length of 48mm is 40mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 84mm.
Below you can find the scaled side by side image of Fujifilm GF 50mm F3.5 R LM WR and Fujifilm GF 45mm F2.8 R WR to get a better idea of how their size compare in real life.
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. Fujifilm GF 50mm F3.5 R LM WR weighs 335g, which means it is 155g (46%) lighter than the Fujifilm GF 45mm F2.8 R WR which has a weight of 490g.
Both Fujifilm GF 50mm F3.5 R LM WR and Fujifilm GF 45mm F2.8 R WR has the same Fujifilm G lens mount. Some of the latest released cameras that are compatible with the Fujifilm G lenses are Fujifilm GFX 50S II, Fujifilm GFX 100S and Fujifilm GFX 100.
Fujifilm GF 50mm F3.5 R LM WR is a prime lens with fixed focal lenght of 50mm. Fujifilm GF 45mm F2.8 R WR is a prime lens with fixed focal lenght of 45mm.