The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 16-300mm f3.5-6.3 II VC PZD and the Sigma 18-200mm F3.5-6.3 DC 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 16-300mm f3.5-6.3 II VC PZD is the longer of the two lenses at 100mm. The Sigma 18-200mm F3.5-6.3 DC with a length of 78mm, is 22mm shorter. Besides being longer, the Tamron 16-300mm f3.5-6.3 II VC PZD also has a larger diameter of 75mm compared to the Sigma 18-200mm F3.5-6.3 DC's 70mm 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. Sigma 18-200mm F3.5-6.3 DC weighs 405g, 25% (135g) lighter than the Tamron 16-300mm f3.5-6.3 II VC PZD's weight of 540g.
Filter Threads
The Tamron 16-300mm f3.5-6.3 II VC PZD has a filter size of 67mm whereas the Sigma 18-200mm F3.5-6.3 DC has a 62mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Tamron 16-300mm f3.5-6.3 II VC PZD:
And these are the 62mm filters that we recommend for the Sigma 18-200mm F3.5-6.3 DC:
Lens Mounts
The Tamron 16-300mm f3.5-6.3 II VC PZD has the Sony Alpha lens mount whereas the Sigma 18-200mm F3.5-6.3 DC has the Pentax KAF 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 Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF Mount.
Tamron 16-300mm f3.5-6.3 II VC PZD is also available in the Canon EF and Nikon F (DX) mounts.
Sigma 18-200mm F3.5-6.3 DC is also available in Canon EF , Nikon F (DX), Sony Alpha and Sigma SA mounts.
Focal Range
Tamron 16-300mm f3.5-6.3 II VC PZD has a focal range of 16-300mm and
18.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
24-450mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 18-200mm F3.5-6.3 DC 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.
