The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 16-30mm f2.8 and the Tamron 20-40mm F2.8 VXD 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 16-30mm f2.8 is the longer of the two lenses at 104mm. The Tamron 20-40mm F2.8 VXD with a length of 86mm, is 18mm shorter. Besides being longer, the Tamron 16-30mm f2.8 also has a larger diameter of 75mm compared to the Tamron 20-40mm F2.8 VXD's 74mm diameter.
Below you can find a scaled side-by-side image of Tamron 16-30mm f2.8 and Tamron 20-40mm F2.8 VXD to get a better idea of how their sizes compare in real life.
Comparison image of the Tamron 16-30mm f2.8 and the Tamron 20-40mm F2.8 VXD 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. Tamron 20-40mm F2.8 VXD weighs 365g, 18% (85g) lighter than the Tamron 16-30mm f2.8's weight of 450g.
Filter Threads
Both the Tamron 16-30mm f2.8 and the Tamron 20-40mm F2.8 VXD have the same Filter thread size of 67mm .
Below are links to the 67mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Tamron 16-30mm f2.8 has the Nikon Z lens mount whereas the Tamron 20-40mm F2.8 VXD has the Sony E lens mount . Some of the latest released cameras that are compatible with these mounts are Nikon ZR , Nikon Z5 II and RED Komodo-X 6K Z for the Nikon Z Mount and Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount.
Focal Range
Tamron 16-30mm f2.8 has a focal range of 16-30mm 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
24 - 45mm .
On the other hand, the Tamron 20-40mm F2.8 VXD has a focal range of 20-40mm and 2.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 30 - 60mm .
