The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 17-70 F2.8 Di III-A VC and the Sony E 18-200mm F3.5-6.3 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. Tamron 17-70 F2.8 Di III-A VC is the longer of the two lenses at 119mm. The Sony E 18-200mm F3.5-6.3 with a length of 99mm, is 20mm shorter. On the other hand, the Sony E 18-200mm F3.5-6.3 has a larger diameter of 76mm compared to the Tamron 17-70 F2.8 Di III-A VC's 75mm 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. Sony E 18-200mm F3.5-6.3 weighs 524g, 0% (1g) lighter than the Tamron 17-70 F2.8 Di III-A VC's weight of 525g.
Filter Threads
Both the Tamron 17-70 F2.8 Di III-A VC and the Sony E 18-200mm F3.5-6.3 have the same Filter thread size of 67mm.
Below are links to the 67mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Tamron 17-70 F2.8 Di III-A VC and the Sony E 18-200mm F3.5-6.3 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony ZV-E10 II, Sony A6700 and Sony FX30.
Tamron 17-70 F2.8 Di III-A VC is also available in the Fujifilm X mount.
Focal Range
Tamron 17-70 F2.8 Di III-A VC has a focal range of 17-70mm and
4.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
25.5-105mm when used on a APS-C / DX format camera.
On the other hand, the Sony E 18-200mm F3.5-6.3 has a focal range of 18-200mm and 11.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-300mm when used on a APS-C / DX format camera.
