The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 100-400mm and the Sigma 50-100mm F1.8 A 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 50-100mm F1.8 A is the longer of the two lenses at 171mm. The Canon RF 100-400mm with a length of 165mm, is 6mm shorter. Besides being longer, the Sigma 50-100mm F1.8 A also has a larger diameter of 94mm compared to the Canon RF 100-400mm's 80mm diameter.
Below you can find a scaled side-by-side image of Canon RF 100-400mm and Sigma 50-100mm F1.8 A to get a better idea of how their sizes compare in real life.
Comparison image of the Canon RF 100-400mm and the Sigma 50-100mm F1.8 A 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 100-400mm weighs 635g, which means it is 855g (57%) lighter than the Sigma 50-100mm F1.8 A which has a weight of 1490g.
Filter Threads
The Canon RF 100-400mm has a filter size of 67mm whereas the Sigma 50-100mm F1.8 A has a 82mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Canon RF 100-400mm:
And these are the 82mm filters that we recommend for the Sigma 50-100mm F1.8 A:
Lens Mounts
The Canon RF 100-400mm has the Canon RF lens mount whereas the Sigma 50-100mm F1.8 A has the Canon EF 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 Canon T8i , Canon 90D and Canon SL3 for the Canon EF Mount.
Nikon F (DX) and Sigma SA mounts.
Focal Range
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 .
On the other hand, the Sigma 50-100mm F1.8 A has a focal range of 50-100mm and 2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 80-160mm when used on a APS-C / DX format camera.
