The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 18-200mm f3.5-6.3 III VC and the Sigma 150mm F2.8 EX DG Macro HSM 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. Sigma 150mm F2.8 EX DG Macro HSM is the longer of the two lenses at 137mm. The Tamron 18-200mm f3.5-6.3 III VC with a length of 97mm, is 40mm shorter. Besides being longer, the Sigma 150mm F2.8 EX DG Macro HSM also has a larger diameter of 80mm compared to the Tamron 18-200mm f3.5-6.3 III VC's 68mm 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 18-200mm f3.5-6.3 III VC weighs 460g, which means it is 435g (48%) lighter than the Sigma 150mm F2.8 EX DG Macro HSM which has a weight of 895g.
Filter Threads
The Tamron 18-200mm f3.5-6.3 III VC has a filter size of 62mm whereas the Sigma 150mm F2.8 EX DG Macro HSM has a 72mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Tamron 18-200mm f3.5-6.3 III VC:
And these are the 72mm filters that we recommend for the Sigma 150mm F2.8 EX DG Macro HSM:
Lens Mounts
The Tamron 18-200mm f3.5-6.3 III VC has the Sony E lens mount whereas the Sigma 150mm F2.8 EX DG Macro HSM has the Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with these mounts are Sony ZV-E10 II, Sony A6700 and Sony FX30 for the Sony E Mount and Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount.
Sigma 150mm F2.8 EX DG Macro HSM is also available in Canon EF , Four Thirds and Sigma SA mounts.
Focal Range
Tamron 18-200mm f3.5-6.3 III VC 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.
On the other hand, the Sigma 150mm F2.8 EX DG Macro HSM is a prime lens with fixed focal lenght of 150mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 225mm.
