The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 20mm F1.8 G and the Venus 9mm F2.8 Zero-D 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 FE 20mm F1.8 G is the longer of the two lenses at 85mm. The Venus 9mm F2.8 Zero-D with a length of 53mm, is 32mm shorter. Besides being longer, the Sony FE 20mm F1.8 G also has a larger diameter of 74mm compared to the Venus 9mm F2.8 Zero-D's 60mm diameter.
Below you can find a scaled side-by-side image of Sony FE 20mm F1.8 G and Venus 9mm F2.8 Zero-D to get a better idea of how their sizes compare in real life.
Comparison image of the Sony FE 20mm F1.8 G and the Venus 9mm F2.8 Zero-D 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. Venus 9mm F2.8 Zero-D weighs 215g, 42% (158g) lighter than the Sony FE 20mm F1.8 G's weight of 373g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Sony E Mount for size comparison purposes.
Ultra-Wideangle Sony E Mount
Filter Threads
The Sony FE 20mm F1.8 G has a filter size of 67mm whereas the Venus 9mm F2.8 Zero-D 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 Sony FE 20mm F1.8 G:
And these are the 49mm filters that we recommend for the Venus 9mm F2.8 Zero-D:
Lens Mounts
Both the Sony FE 20mm F1.8 G and the Venus 9mm F2.8 Zero-D has the same Sony E lens mount . Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX5 , Sony A7R VI and Sony A7 V .
Canon EF-M and Fujifilm X mounts.
Focal Range
Sony FE 20mm F1.8 G is a prime lens with fixed focal lenght of 20mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
30mm .
On the other hand, the Venus 9mm F2.8 Zero-D is a prime lens with fixed focal lenght of 9mm which has an effective (full-frame 35mm equivalent) focal range of 13.5mm when used on a APS-C / DX format camera.
