The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Venus 100mm F2.8 2X Ultra Macro and the Sigma 70mm F2.8 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. Venus 100mm F2.8 2X Ultra Macro is the longer of the two lenses at 125mm. The Sigma 70mm F2.8 DG Macro 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's 71mm diameter.
Below you can find a scaled side-by-side image of Venus 100mm F2.8 2X Ultra Macro and Sigma 70mm F2.8 DG Macro to get a better idea of how their sizes compare in real life.
Comparison image of the Venus 100mm F2.8 2X Ultra Macro and the Sigma 70mm F2.8 DG 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 weighs 515g, 19% (123g) lighter than the Venus 100mm F2.8 2X Ultra Macro's weight of 638g.
Filter Threads
The Venus 100mm F2.8 2X Ultra Macro has a filter size of 67mm whereas the Sigma 70mm F2.8 DG Macro has a 49mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Venus 100mm F2.8 2X Ultra Macro:
And these are the 49mm filters that we recommend for the Sigma 70mm F2.8 DG Macro:
Lens Mounts
The Venus 100mm F2.8 2X Ultra Macro has the Canon EF lens mount whereas the Sigma 70mm F2.8 DG Macro has the Sony E lens mount . Some of the latest released cameras that are compatible with these mounts are Blackmagic URSA 12K LF , Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount and Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount.
Nikon F (FX) , Pentax KAF2 and Sony E mounts.
Canon EF , Nikon F (FX) and Sigma SA mounts.
Focal Range
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 .
On the other hand, the Sigma 70mm F2.8 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 .
