The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony E 70-350mm F4.5-6.3 G OSS 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 an important deciding factor when comparing two lenses. Tamron 70-180mm F2.8 Di is the longer of the two lenses at 149mm. The Sony E 70-350mm F4.5-6.3 G OSS with a length of 142mm, is 7mm shorter. Besides being longer, the Tamron 70-180mm F2.8 Di also has a larger diameter of 81mm compared to the Sony E 70-350mm F4.5-6.3 G OSS's 77mm diameter.
Below you can find a scaled side-by-side image of Sony E 70-350mm F4.5-6.3 G OSS and Tamron 70-180mm F2.8 Di to get a better idea of how their sizes compare in real life.
The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Sony E 70-350mm F4.5-6.3 G OSS weighs 625g, which means it is 190g (23%) lighter than the Tamron 70-180mm F2.8 Di which has a weight of 815g.
Below you can find the dimension and weight table of the Telephoto Zoom Lenses in Sony E Mount for size comparison purposes.
Telephoto Zoom Lenses in Sony E Mount for Size Comparison
Both the Sony E 70-350mm F4.5-6.3 G OSS 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 FX30, Sony ZV-E10 and Sony A6600.
Sony E 70-350mm F4.5-6.3 G OSS has a focal range of 70-350mm and 5.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 105-525mm when used on a APS-C / DX format camera. 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.