The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF-S 10-18mm F4.5-6.3 and the Canon RF 10-20mm F4 L IS STM 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 10-20mm F4 L IS STM is the longer of the two lenses at 112mm. The Canon RF-S 10-18mm F4.5-6.3 with a length of 45mm, is 67mm shorter. Besides being longer, the Canon RF 10-20mm F4 L IS STM also has a larger diameter of 84mm compared to the Canon RF-S 10-18mm F4.5-6.3's 69mm diameter.
Below you can find a scaled side-by-side image of Canon RF-S 10-18mm F4.5-6.3 and Canon RF 10-20mm F4 L IS STM to get a better idea of how their sizes compare in real life.
Comparison image of the Canon RF-S 10-18mm F4.5-6.3 and the Canon RF 10-20mm F4 L IS STM Size and Weight 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 10-18mm F4.5-6.3 weighs 150g, which means it is 420g (73%) lighter than the Canon RF 10-20mm F4 L IS STM which has a weight of 570g.
Below you can find the dimension and weight table of the Wideangle Zoom Lenses in Canon RF Mount for size comparison purposes.
Ultra-Wideangle Canon RF Mount
Lens Mounts
Both the Canon RF-S 10-18mm F4.5-6.3 and the Canon RF 10-20mm F4 L IS STM has the same Canon RF lens mount . Some of the latest released cameras that are compatible with the Canon RF lenses are Canon R50 V , Canon R100 and Canon R50 .
Focal Range
Canon RF-S 10-18mm F4.5-6.3 has a focal range of 10-18mm and
1.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
16-28.8mm when used on a APS-C / DX format camera.
On the other hand, the Canon RF 10-20mm F4 L IS STM has a focal range of 10-20mm and 2.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 15 - 30mm .
