The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Venus 105mm F2 and the Sigma 85mm F1.4 DG DN 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 105mm F2 is the longer of the two lenses at 99mm. The Sigma 85mm F1.4 DG DN with a length of 94mm, is 5mm shorter. On the other hand, the Sigma 85mm F1.4 DG DN has a larger diameter of 83mm compared to the Venus 105mm F2's 76mm diameter.
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Below you can find a scaled side-by-side image of Venus 105mm F2 and Sigma 85mm F1.4 DG DN to get a better idea of how their sizes compare in real life.
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 85mm F1.4 DG DN weighs 630g, 15% (115g) lighter than the Venus 105mm F2's weight of 745g.
Below you can find the dimension and weight table of the Telephoto Prime Lenses in Sony E Mount for size comparison purposes.
Telephoto Lenses in Sony E Mount for Size Comparison
Filter Threads
The Venus 105mm F2 has a filter size of 67mm whereas the Sigma 85mm F1.4 DG DN has a 77mm 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 105mm F2:
And these are the 77mm filters that we recommend for the Sigma 85mm F1.4 DG DN :
Lens Mounts
Both the Venus 105mm F2 and the Sigma 85mm F1.4 DG DN has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A9 III, Sony A7C Mark II and Sony A7CR.
Venus 105mm F2 is also available in Canon EF , Nikon F (FX), Pentax KAF2 and Sony Alpha mounts.
Focal Range
Venus 105mm F2 is a prime lens with fixed focal lenght of 105mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
157.5mm.
On the other hand, the Sigma 85mm F1.4 DG DN is a prime lens with fixed focal lenght of 85mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 127.5mm.