The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 60mm f2 II LD IF Macro and the Sigma 70mm F2.8 EX DG Macro for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Sigma 70mm F2.8 EX DG Macro is the longer of the two lenses at 95mm. The Tamron 60mm f2 II LD IF Macro with a length of 80mm is 15mm shorter. Besides being longer, the Sigma 70mm F2.8 EX DG Macro also has a larger diameter of 76mm compared to Tamron 60mm f2 II LD IF Macro's 73mm 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 60mm f2 II LD IF Macro weighs 400g, which means it is 127g (24%) lighter than the Sigma 70mm F2.8 EX DG Macro which has a weight of 527g.
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
Lens Mounts
Both Tamron 60mm f2 II LD IF Macro and Sigma 70mm F2.8 EX DG Macro has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon T8i, Canon 90D and Canon SL3.
Tamron 60mm f2 II LD IF Macro is also available in Nikon F (DX) and Sony Alpha mounts.
Sigma 70mm F2.8 EX DG Macro is also available in Nikon F (FX) , Pentax KAF, Sony Alpha and Sigma SA mounts.
Focal Range
Tamron 60mm f2 II LD IF Macro is a prime lens with fixed focal lenght of 60mm which has an effective (full-frame 35mm equivalent) focal range of 96mm when used on a APS-C / DX format camera. Sigma 70mm F2.8 EX DG Macro is a prime lens with fixed focal lenght of 70mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 112mm.