The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox 85mm F2.0 and the Tamron 28-75mm F2.8 Di III 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 28-75mm F2.8 Di III is the longer of the two lenses at 118mm. The Viltrox 85mm F2.0 with a length of 76mm, is 42mm shorter. Besides being longer, the Tamron 28-75mm F2.8 Di III also has a larger diameter of 76mm compared to the Viltrox 85mm F2.0's 69mm 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. Viltrox 85mm F2.0 weighs 340g, which means it is 200g (37%) lighter than the Tamron 28-75mm F2.8 Di III which has a weight of 540g.
Filter Threads
The Viltrox 85mm F2.0 has a filter size of 58mm whereas the Tamron 28-75mm F2.8 Di III has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 58mm filters that we recommend you to consider for the Viltrox 85mm F2.0:
And these are the 67mm filters that we recommend for the Tamron 28-75mm F2.8 Di III:
Lens Mounts
The Viltrox 85mm F2.0 has the Sony E lens mount whereas the Tamron 28-75mm F2.8 Di III has the Nikon Z lens mount. Some of the latest released cameras that are compatible with these mounts are Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount and Nikon ZR, Nikon Z5 II and RED Komodo-X 6K Z for the Nikon Z Mount.
Viltrox 85mm F2.0 is also available in the Nikon Z mount.
Tamron 28-75mm F2.8 Di III is also available in Sony E and Sony E mounts.
Focal Range
Viltrox 85mm F2.0 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.
On the other hand, the Tamron 28-75mm F2.8 Di III has a focal range of 28-75mm and 2.7X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42 - 112.5mm.
