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 and the Sony FE 70-200mm F2.8 GM for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Sony FE 70-200mm F2.8 GM is the longer of the two lenses at 200mm. The Tamron 70-180mm F2.8 Di with a length of 149mm is 51mm shorter. Besides being longer, the Sony FE 70-200mm F2.8 GM also has a larger diameter of 88mm compared to Tamron 70-180mm F2.8 Di's 81mm diameter.
Below you can find the scaled side by side image of Tamron 70-180mm F2.8 Di and Sony FE 70-200mm F2.8 GM to get a better idea of how their size compare in real life.
Comparison image of Tamron 70-180mm F2.8 Di and Sony FE 70-200mm F2.8 GM Size and Weight 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. Tamron 70-180mm F2.8 Di weighs 815g, which means it is 665g (44%) lighter than the Sony FE 70-200mm F2.8 GM which has a weight of 1480g.
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
Lens Mounts
Both Tamron 70-180mm F2.8 Di and Sony FE 70-200mm F2.8 GM has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A7R V, Sony FX30 and Sony A7 IV.
Focal Range
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 an 35mm (FF) equivalent of 105 - 270mm.
Sony FE 70-200mm F2.8 GM has a focal range of 70-200mm and 2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 105 - 300mm.