The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox AF 28mm F1.8 Z 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 117mm. The Viltrox AF 28mm F1.8 Z with a length of 82mm, is 35mm shorter. Besides being longer, the Tamron 28-75mm F2.8 Di III also has a larger diameter of 73mm compared to the Viltrox AF 28mm F1.8 Z's 70mm 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 AF 28mm F1.8 Z weighs 367g, which means it is 183g (33%) lighter than the Tamron 28-75mm F2.8 Di III which has a weight of 550g.
Filter Threads
The Viltrox AF 28mm F1.8 Z has a filter size of 55mm 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 55mm filters that we recommend you to consider for the Viltrox AF 28mm F1.8 Z:
And these are the 67mm filters that we recommend for the Tamron 28-75mm F2.8 Di III:
Lens Mounts
The Viltrox AF 28mm F1.8 Z has the Nikon Z lens mount whereas the Tamron 28-75mm F2.8 Di III 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.
Tamron 28-75mm F2.8 Di III is also available in Sony E and Nikon Z mounts.
Focal Range
Viltrox AF 28mm F1.8 Z is a prime lens with fixed focal lenght of 28mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
42mm.
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.
