The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Venus 8-15mm f2.8 and the 7Artisans FF 18mm f5.6 Z 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 8-15mm f2.8 is the longer of the two lenses at 76mm. The 7Artisans FF 18mm f5.6 Z with a length of 32mm, is 44mm shorter. Besides being longer, the Venus 8-15mm f2.8 also has a larger diameter of 95mm compared to the 7Artisans FF 18mm f5.6 Z's 61mm 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. 7Artisans FF 18mm f5.6 Z weighs 146g, 77% (504g) lighter than the Venus 8-15mm f2.8's weight of 650g.
Lens Mounts
Both the Venus 8-15mm f2.8 and the 7Artisans FF 18mm f5.6 Z has the same Nikon Z lens mount. Some of the latest released cameras that are compatible with the Nikon Z lenses are Nikon ZR, Nikon Z5 II and RED Komodo-X 6K Z.
Venus 8-15mm f2.8 is also available in the Sony E , Canon RF and Leica L mounts.
Focal Range
Venus 8-15mm f2.8 has a focal range of 8-15mm and
1.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
12 - 22.5mm.
On the other hand, the 7Artisans FF 18mm f5.6 Z is a prime lens with fixed focal lenght of 18mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 27mm.
