Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Sigma 200-500mm F2.8 EX DG is the longer of the two lenses at 726mm. The Tamron 200-500mm f5-6.3 LD with a length of 227mm is 499mm shorter. Besides being longer, the Sigma 200-500mm F2.8 EX DG also has a larger diameter of 237mm compared to Tamron 200-500mm f5-6.3 LD's 94mm 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. Tamron 200-500mm f5-6.3 LD weighs 1237g, which means it is 14463g (1169%) lighter than the Sigma 200-500mm F2.8 EX DG which has a weight of 15700g.
Below you can find the dimension and weight table of the 'Telephoto Zoom Lenses in Nikon F (FX) Mount for size comparison purposes.
Telephoto Zoom Lenses in Nikon F (FX) Mount for Size Comparison
Lens Mounts
Both Tamron 200-500mm f5-6.3 LD and Sigma 200-500mm F2.8 EX DG 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.
Tamron 200-500mm f5-6.3 LD is also available in Canon EF and Sony Alpha mounts.
Sigma 200-500mm F2.8 EX DG is also available in Sigma SA and Canon EF mounts.
Focal Range