The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 180mm f3.5 LD Macro and the Canon 180mm f3.5L Macro USM for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Canon 180mm f3.5L Macro USM is the longer of the two lenses at 187mm. The Tamron 180mm f3.5 LD Macro with a length of 166mm is 21mm shorter. On the other hand, the Tamron 180mm f3.5 LD Macro has a larger diameter of 85mm compared to Canon 180mm f3.5L Macro USM's 83mm 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 180mm f3.5 LD Macro weighs 920g, which means it is 170g (15%) lighter than the Canon 180mm f3.5L Macro USM which has a weight of 1090g.
Below you can find the dimension and weight table of the 'Macro Prime Lenses in Canon EF Mount for size comparison purposes.
Macro Prime Lenses in Canon EF Mount for Size Comparison
Both Tamron 180mm f3.5 LD Macro and Canon 180mm f3.5L Macro USM has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon 1D X III, Canon 6D MII and Canon 5D MIV.
Tamron 180mm f3.5 LD Macro is also available in Nikon F (FX) and Sony Alpha mounts.
Both lenses have the same focal range of 180mm and the fastest aperture of F3.5.