The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron AF 18-250mm f3.5-6.3 II LD and the Tamron AF 18-200mm f3.5-6.3 XR II LD for their suitability to various photography scenarios:
Size and Weight Comparison
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 18-200mm f3.5-6.3 XR II LD weighs 398g, 7% (32g) lighter than the Tamron AF 18-250mm f3.5-6.3 II LD's weight of 430g.
Filter Threads
Both the Tamron AF 18-250mm f3.5-6.3 II LD and the Tamron AF 18-200mm f3.5-6.3 XR II LD have the same Filter thread size of 62mm.
Below are links to the 62mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Tamron AF 18-250mm f3.5-6.3 II LD has the Sony Alpha lens mount whereas the Tamron AF 18-200mm f3.5-6.3 XR II LD has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Sony A68, Sony A77 II and Sony A58 for the Sony Alpha Mount and Canon T8i, Canon 90D and Canon SL3 for the Canon EF Mount.
Tamron AF 18-250mm f3.5-6.3 II LD is also available in the Canon EF , Nikon F (DX) and Pentax KAF mounts.
Tamron AF 18-200mm f3.5-6.3 XR II LD is also available in Nikon F (DX) , Sony Alpha and Pentax KAF mounts.
Focal Range
Tamron AF 18-250mm f3.5-6.3 II LD has a focal range of 18-250mm and
13.9X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
27-375mm when used on a APS-C / DX format camera.
On the other hand, the Tamron AF 18-200mm f3.5-6.3 XR II LD has a focal range of 18-200mm and 11.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 28.8-320mm when used on a APS-C / DX format camera.
