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 Sigma 500mm F4.5 EX DG HSM with a length of 350mm is 41mm shorter. Besides being longer, the Nikon 500mm f4G ED VR also has a larger diameter of 140mm compared to Sigma 500mm F4.5 EX DG HSM's 123mm 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. Sigma 500mm F4.5 EX DG HSM weighs 3150g, which means it is 730g (23%) 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 Sigma 500mm F4.5 EX DG HSM 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.
Sigma 500mm F4.5 EX DG HSM is also available in Canon EF , Pentax KAF and Sigma SA mounts.