The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 12-20mm f2.8 and the Venus 8-15mm f2.8 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. Tamron 12-20mm f2.8 is the longer of the two lenses at 121mm. The Venus 8-15mm f2.8 with a length of 76mm, is 45mm shorter. On the other hand, the Venus 8-15mm f2.8 has a larger diameter of 95mm compared to the Tamron 12-20mm f2.8's 90mm 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. Tamron 12-20mm f2.8 weighs 585g, which means it is 65g (9%) lighter than the Venus 8-15mm f2.8 which has a weight of 650g.
Below you can find the dimension and weight table of the Wideangle Zoom Lenses in Nikon Z Mount for size comparison purposes.
Ultra-Wideangle Lenses in Nikon Z Mount for Size Comparison
Lens Mounts
Both the Tamron 12-20mm f2.8 and the Venus 8-15mm f2.8 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.
Tamron 12-20mm f2.8 is also available in the Sony E mount.
Venus 8-15mm f2.8 is also available in Sony E , Canon RF and Leica L mounts.
Focal Range
Tamron 12-20mm f2.8 has a focal range of 12-20mm and
1.7X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
18 - 30mm.
On the other hand, the 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.