The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 70-180mm F2.8 Di G2 and the Sony FE 70-300mm F4.5-5.6 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 Sony FE 70-300mm F4.5-5.6 with a length of 144mm, is 13mm shorter. On the other hand, the Sony FE 70-300mm F4.5-5.6 has a larger diameter of 84mm compared to the Tamron 70-180mm F2.8 Di G2's 83mm diameter.
Below you can find a scaled side-by-side image of Tamron 70-180mm F2.8 Di G2 and Sony FE 70-300mm F4.5-5.6 to get a better idea of how their sizes compare in real life.
Comparison image of the Tamron 70-180mm F2.8 Di G2 and the Sony FE 70-300mm F4.5-5.6 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. Sony FE 70-300mm F4.5-5.6 weighs 854g, 0% (1g) lighter than the Tamron 70-180mm F2.8 Di G2's weight of 855g.
Below you can find the dimension and weight table of the Telephoto Zoom Lenses in Sony E Mount for size comparison purposes.
Telephoto Lenses in Sony E Mount for Size Comparison
Filter Threads
The Tamron 70-180mm F2.8 Di G2 has a filter size of 67mm whereas the Sony FE 70-300mm F4.5-5.6 has a 72mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Tamron 70-180mm F2.8 Di G2:
And these are the 72mm filters that we recommend for the Sony FE 70-300mm F4.5-5.6:
Lens Mounts
Both the Tamron 70-180mm F2.8 Di G2 and the Sony FE 70-300mm F4.5-5.6 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 .
Tamron 70-180mm F2.8 Di G2 is also available in the Nikon Z mount.
Focal Range
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 .
On the other hand, the Sony FE 70-300mm F4.5-5.6 has a focal range of 70-300mm and 4.3X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 105 - 450mm .