The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 90mm F2.8 Di III and the Tamron 70-180mm F2.8 Di G2 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 70-180mm F2.8 Di G2 is the longer of the two lenses at 157mm. The Tamron 90mm F2.8 Di III with a length of 126mm, is 31mm shorter. Besides being longer, the Tamron 70-180mm F2.8 Di G2 also has a larger diameter of 83mm compared to the Tamron 90mm F2.8 Di III's 79mm diameter.
Below you can find a scaled side-by-side image of Tamron 90mm F2.8 Di III and Tamron 70-180mm F2.8 Di G2 to get a better idea of how their sizes compare in real life.
Comparison image of the Tamron 90mm F2.8 Di III and the Tamron 70-180mm F2.8 Di G2 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 90mm F2.8 Di III weighs 630g, which means it is 225g (26%) lighter than the Tamron 70-180mm F2.8 Di G2 which has a weight of 855g.
Filter Threads
Both the Tamron 90mm F2.8 Di III and the Tamron 70-180mm F2.8 Di G2 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 90mm F2.8 Di III has the Nikon Z lens mount whereas the Tamron 70-180mm F2.8 Di G2 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.
Nikon Z mount.
Focal Range
Tamron 90mm F2.8 Di III is a prime lens with fixed focal lenght of 90mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
135mm .
On the other hand, the Tamron 70-180mm F2.8 Di G2 has a focal range of 70-180mm and 2.6X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 105 - 270mm .
