The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 28-75mm F2.8 Di III and the Tamron 70-180mm F2.8 Di 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 is the longer of the two lenses at 149mm. The Tamron 28-75mm F2.8 Di III with a length of 118mm, is 31mm shorter. Besides being longer, the Tamron 70-180mm F2.8 Di also has a larger diameter of 81mm compared to the Tamron 28-75mm F2.8 Di III's 76mm diameter.
Below you can find a scaled side-by-side image of Tamron 28-75mm F2.8 Di III and Tamron 70-180mm F2.8 Di to get a better idea of how their sizes compare in real life.
Comparison image of the Tamron 28-75mm F2.8 Di III and the Tamron 70-180mm F2.8 Di 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 28-75mm F2.8 Di III weighs 540g, which means it is 275g (33%) lighter than the Tamron 70-180mm F2.8 Di which has a weight of 815g.
Filter Threads
Both the Tamron 28-75mm F2.8 Di III and the Tamron 70-180mm F2.8 Di 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
Both the Tamron 28-75mm F2.8 Di III and the Tamron 70-180mm F2.8 Di has the same Sony E lens mount . Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX5 , Sony A7R VI and Sony A7 V .
Sony E and Nikon Z mounts.
Focal Range
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 .
On the other hand, the Tamron 70-180mm F2.8 Di 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 .
