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 Canon RF 100-400mm 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 100-400mm is the longer of the two lenses at 165mm. The Canon RF-S 18-150mm f3.5-6.3 IS with a length of 87mm, is 78mm shorter. Besides being longer, the Canon RF 100-400mm also has a larger diameter of 80mm compared to the Canon RF-S 18-150mm f3.5-6.3 IS's 69mm diameter.
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Below you can find a scaled side-by-side image of Canon RF-S 18-150mm f3.5-6.3 IS and Canon RF 100-400mm to get a better idea of how their sizes compare in real life.
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 325g (51%) lighter than the Canon RF 100-400mm which has a weight of 635g.
Filter Threads
The Canon RF-S 18-150mm f3.5-6.3 IS has a filter size of 55mm whereas the Canon RF 100-400mm has a 67mm 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 67mm filters that we recommend for the Canon RF 100-400mm:
Lens Mounts
Both the Canon RF-S 18-150mm f3.5-6.3 IS and the Canon RF 100-400mm has the same Canon RF lens mount. Some of the latest released cameras that are compatible with the Canon RF lenses are Canon R100, Canon R50 and Canon R10.
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 Canon RF 100-400mm has a focal range of 100-400mm and 4.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 160 - 640mm.