The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 70-200mm f2.8 VC USD and the Sony DT 55-200mm F4-5.6 SAM for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Tamron 70-200mm f2.8 VC USD is the longer of the two lenses at 197mm. The Sony DT 55-200mm F4-5.6 SAM with a length of 85mm is 112mm shorter. Besides being longer, the Tamron 70-200mm f2.8 VC USD also has a larger diameter of 86mm compared to Sony DT 55-200mm F4-5.6 SAM's 72mm diameter.
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 DT 55-200mm F4-5.6 SAM weighs 305g, 79% (1165g) lighter than the Tamron 70-200mm f2.8 VC USD's weight of 1470g.
Below you can find the dimension and weight table of the 'Telephoto Zoom Lenses in Sony Alpha Mount for size comparison purposes.
Telephoto Zoom Lenses in Sony Alpha Mount for Size Comparison
Both Tamron 70-200mm f2.8 VC USD and Sony DT 55-200mm F4-5.6 SAM has the same Sony Alpha lens mount. Some of the latest released cameras that are compatible with the Sony Alpha lenses are Sony A99 II, Sony A68 and Sony A77 II.
Tamron 70-200mm f2.8 VC USD is also available in Canon EF and Nikon F (FX) mounts.
Tamron 70-200mm f2.8 VC USD 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.
Sony DT 55-200mm F4-5.6 SAM has a focal range of 55-200mm and 3.6X zoom ratio which has a 35mm equivalent focal range of 82.5-300mm when used on a APS-C / DX format camera.