The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 70mm F2.8 DG Macro A and the Venus 100mm F2.8 2X Ultra 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. Venus 100mm F2.8 2X Ultra Macro is the longer of the two lenses at 125mm. The Sigma 70mm F2.8 DG Macro A with a length of 106mm, is 19mm shorter. Besides being longer, the Venus 100mm F2.8 2X Ultra Macro also has a larger diameter of 72mm compared to the Sigma 70mm F2.8 DG Macro A's 71mm diameter.
Below you can find a scaled side-by-side image of Sigma 70mm F2.8 DG Macro A and Venus 100mm F2.8 2X Ultra Macro to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 70mm F2.8 DG Macro A and the Venus 100mm F2.8 2X Ultra Macro Size and Weight 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. Sigma 70mm F2.8 DG Macro A weighs 515g, which means it is 123g (19%) lighter than the Venus 100mm F2.8 2X Ultra Macro which has a weight of 638g.
Filter Threads
The Sigma 70mm F2.8 DG Macro A has a filter size of 49mm whereas the Venus 100mm F2.8 2X Ultra Macro has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 49mm filters that we recommend you to consider for the Sigma 70mm F2.8 DG Macro A:
And these are the 67mm filters that we recommend for the Venus 100mm F2.8 2X Ultra Macro:
Lens Mounts
The Sigma 70mm F2.8 DG Macro A has the Leica L lens mount whereas the Venus 100mm F2.8 2X Ultra Macro has the Canon EF lens mount . Some of the latest released cameras that are compatible with these mounts are Leica SL3-P , Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount and Blackmagic URSA 12K LF , Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount.
Nikon F (FX) , Pentax KAF2 and Sony E mounts.
Focal Range
Sigma 70mm F2.8 DG Macro A is a prime lens with fixed focal lenght of 70mm.
On the other hand, the Venus 100mm F2.8 2X Ultra Macro is a prime lens with fixed focal lenght of 100mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 160mm .
