Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Nikon 500mm f4G ED VR is the longer of the two lenses at 391mm. The Nikon 500mm F4E FL ED VR with a length of 387mm is 4mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 140mm.
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. Nikon 500mm F4E FL ED VR weighs 3090g, which means it is 790g (25%) lighter than the Nikon 500mm f4G ED VR which has a weight of 3880g.
Below you can find the dimension and weight table of the 'Telephoto Prime Lenses in Nikon F (FX) Mount for size comparison purposes.
Telephoto Prime Lenses in Nikon F (FX) Mount for Size Comparison
Both Nikon 500mm F4E FL ED VR and Nikon 500mm f4G ED VR has the same Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (FX) lenses are Nikon D6, Nikon D780 and Nikon D3500.
Both lenses have the same focal range of 500mm and the fastest aperture of F4.0.