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 LD and the Tamron AF 55-200mm f4-5.6 II LD 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 LD is the longer of the two lenses at 194mm. The Tamron AF 55-200mm f4-5.6 II LD with a length of 83mm is 111mm shorter. Besides being longer, the Tamron 70-200mm f2.8 LD also has a larger diameter of 90mm compared to Tamron AF 55-200mm f4-5.6 II LD'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. Tamron AF 55-200mm f4-5.6 II LD weighs 300g, 77% (1030g) lighter than the Tamron 70-200mm f2.8 LD's weight of 1330g.
Below you can find the dimension and weight table of the 'Telephoto Zoom Lenses in Canon EF Mount for size comparison purposes.
Telephoto Zoom Lenses in Canon EF Mount for Size Comparison
Both Tamron 70-200mm f2.8 LD and Tamron AF 55-200mm f4-5.6 II LD has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon 1D X III, Canon 6D MII and Canon 5D MIV.
Tamron 70-200mm f2.8 LD is also available in Nikon F (FX) , Sony Alpha and Pentax KAF mounts.
Tamron AF 55-200mm f4-5.6 II LD is also available in Nikon F (DX) and Sony Alpha mounts.
Tamron 70-200mm f2.8 LD has a focal range of 70-200mm and 2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 112 - 320mm.
Tamron AF 55-200mm f4-5.6 II LD has a focal range of 55-200mm and 3.6X zoom ratio which has a 35mm equivalent focal range of 88-320mm when used on a APS-C / DX format camera.