The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony 100mm F2.8 Macro and the Sigma 70mm F2.8 EX DG Macro for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Sony 100mm F2.8 Macro is the longer of the two lenses at 99mm. The Sigma 70mm F2.8 EX DG Macro with a length of 95mm, is 4mm shorter. On the other hand, the Sigma 70mm F2.8 EX DG Macro has a larger diameter of 76mm compared to the Sony 100mm F2.8 Macro's 75mm diameter.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Sony 100mm F2.8 Macro weighs 505g, which means it is 22g (4%) 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 Sony Alpha Mount for size comparison purposes.
Macro Lenses in Sony Alpha Mount for Size Comparison
Lens Mounts
Both the Sony 100mm F2.8 Macro and the Sigma 70mm F2.8 EX DG Macro has the same Sony Alpha lens mount. Some of the latest released cameras that are compatible with the Sony Alpha lenses are Sony A99 II, Sony A68 and Sony A77 II.
Sigma 70mm F2.8 EX DG Macro is also available in Canon EF , Nikon F (FX), Pentax KAF and Sigma SA mounts.
Focal Range
Sony 100mm F2.8 Macro is a prime lens with fixed focal lenght of 100mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
150mm.
On the other hand, the 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 1.5x crop, it provides a 35mm (FF) equivalent of 105mm.
