The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony 300mm F2.8 G SSM II and the Tamron 70-200mm f2.8 VC USD 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. Sony 300mm F2.8 G SSM II is the longer of the two lenses at 243mm. The Tamron 70-200mm f2.8 VC USD with a length of 197mm, is 46mm shorter. Besides being longer, the Sony 300mm F2.8 G SSM II also has a larger diameter of 122mm compared to the Tamron 70-200mm f2.8 VC USD's 86mm diameter.
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 70-200mm f2.8 VC USD weighs 1470g, 36% (830g) lighter than the Sony 300mm F2.8 G SSM II's weight of 2300g.
Lens Mounts
Both the Sony 300mm F2.8 G SSM II and the Tamron 70-200mm f2.8 VC USD 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.
Focal Range
Sony 300mm F2.8 G SSM II is a prime lens with fixed focal lenght of 300mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
450mm.
On the other hand, the 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 a 35mm (FF) equivalent of 105 - 300mm.
