The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 24-240mm F4-6.3 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. Canon RF 24-240mm F4-6.3 is the longer of the two lenses at 123mm. The Sigma 18-200mm F3.5-6.3 DC with a length of 78mm, is 45mm shorter. Besides being longer, the Canon RF 24-240mm F4-6.3 also has a larger diameter of 80mm 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, 46% (345g) lighter than the Canon RF 24-240mm F4-6.3's weight of 750g.
Filter Threads
The Canon RF 24-240mm F4-6.3 has a filter size of 72mm 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 72mm filters that we recommend you to consider for the Canon RF 24-240mm F4-6.3:
And these are the 62mm filters that we recommend for the Sigma 18-200mm F3.5-6.3 DC:
Lens Mounts
The Canon RF 24-240mm F4-6.3 has the Canon RF lens mount whereas the Sigma 18-200mm F3.5-6.3 DC has the Sony Alpha lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R6 V, Canon R6 III and Canon C50 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 is also available in Canon EF , Nikon F (DX), Pentax KAF and Sigma SA mounts.
Focal Range
Canon RF 24-240mm F4-6.3 has a focal range of 24-240mm and
10.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
38.4 - 384mm.
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.
