The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron AF 55-200mm f4-5.6 II LD and the Canon 75-300mm f4.0-5.6 III USM 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. Canon 75-300mm f4.0-5.6 III USM is the longer of the two lenses at 122mm. The Tamron AF 55-200mm f4-5.6 II LD with a length of 83mm, is 39mm shorter. On the other hand, the Tamron AF 55-200mm f4-5.6 II LD has a larger diameter of 72mm compared to the Canon 75-300mm f4.0-5.6 III USM's 71mm 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 AF 55-200mm f4-5.6 II LD weighs 300g, which means it is 180g (37%) lighter than the Canon 75-300mm f4.0-5.6 III USM which has a weight of 480g.
Below you can find the dimension and weight table of the Telephoto Zoom Lenses in Canon EF Mount for size comparison purposes.
Telephoto Lenses in Canon EF Mount for Size Comparison
Filter Threads
The Tamron AF 55-200mm f4-5.6 II LD has a filter size of 52mm whereas the Canon 75-300mm f4.0-5.6 III USM has a 58mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 52mm filters that we recommend you to consider for the Tamron AF 55-200mm f4-5.6 II LD:
And these are the 58mm filters that we recommend for the Canon 75-300mm f4.0-5.6 III USM:
Lens Mounts
Both the Tamron AF 55-200mm f4-5.6 II LD and the Canon 75-300mm f4.0-5.6 III USM has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon T8i, Canon 90D and Canon SL3.
Tamron AF 55-200mm f4-5.6 II LD is also available in the Nikon F (DX) and Sony Alpha mounts.
Focal Range
Tamron AF 55-200mm f4-5.6 II LD has a focal range of 55-200mm and
3.6X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
88-320mm when used on a APS-C / DX format camera.
On the other hand, the Canon 75-300mm f4.0-5.6 III USM has a focal range of 75-300mm and 4.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 120 - 480mm.