The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF-S 18-150mm f3.5-6.3 IS and the Sigma 18-200mm F3.5-6.3 DC OS HSM C 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 RF-S 18-150mm f3.5-6.3 IS is the longer of the two lenses at 95mm. The Sigma 18-200mm F3.5-6.3 DC OS HSM C with a length of 86mm, is 9mm shorter. On the other hand, the Sigma 18-200mm F3.5-6.3 DC OS HSM C has a larger diameter of 71mm compared to the Canon RF-S 18-150mm f3.5-6.3 IS's 69mm 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. Canon RF-S 18-150mm f3.5-6.3 IS weighs 310g, which means it is 120g (27%) lighter than the Sigma 18-200mm F3.5-6.3 DC OS HSM C which has a weight of 430g.
Filter Threads
The Canon RF-S 18-150mm f3.5-6.3 IS has a filter size of 55mm whereas the Sigma 18-200mm F3.5-6.3 DC OS HSM C 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 55mm filters that we recommend you to consider for the Canon RF-S 18-150mm f3.5-6.3 IS:
And these are the 62mm filters that we recommend for the Sigma 18-200mm F3.5-6.3 DC OS HSM C:
Lens Mounts
The Canon RF-S 18-150mm f3.5-6.3 IS has the Canon RF lens mount whereas the Sigma 18-200mm F3.5-6.3 DC OS HSM C has the Sony Alpha lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R50 V, Canon R100 and Canon R50 for the Canon RF Mount and Sony A68, Sony A77 II and Sony A58 for the Sony Alpha Mount.
Sigma 18-200mm F3.5-6.3 DC OS HSM C is also available in Canon EF , Nikon F (DX), Pentax KAF3 and Sigma SA mounts.
Focal Range
Canon RF-S 18-150mm f3.5-6.3 IS has a focal range of 18-150mm and
8.3X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
28.8-240mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 18-200mm F3.5-6.3 DC OS HSM C 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.
