The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 600mm F11 IS STM and the Sigma 150-600mm F5-6.3 DG 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. Sigma 150-600mm F5-6.3 DG OS HSM C is the longer of the two lenses at 290mm. The Canon RF 600mm F11 IS STM with a length of 270mm, is 20mm shorter. Besides being longer, the Sigma 150-600mm F5-6.3 DG OS HSM C also has a larger diameter of 121mm compared to the Canon RF 600mm F11 IS STM's 93mm diameter.
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Below you can find a scaled side-by-side image of Canon RF 600mm F11 IS STM and Sigma 150-600mm F5-6.3 DG OS HSM C 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 600mm F11 IS STM weighs 930g, which means it is 1000g (51%) lighter than the Sigma 150-600mm F5-6.3 DG OS HSM C which has a weight of 1930g.
Filter Threads
The Canon RF 600mm F11 IS STM has a filter size of 82mm whereas the Sigma 150-600mm F5-6.3 DG OS HSM C has a 95mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 82mm filters that we recommend you to consider for the Canon RF 600mm F11 IS STM:
And these are the 95mm filters that we recommend for the Sigma 150-600mm F5-6.3 DG OS HSM C:
Lens Mounts
The Canon RF 600mm F11 IS STM has the Canon RF lens mount whereas the Sigma 150-600mm F5-6.3 DG OS HSM C has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R100, Canon R8 and Canon R50 for the Canon RF Mount and Canon 1D X III, Canon 6D MII and Canon 5D MIV for the Canon EF Mount.
Sigma 150-600mm F5-6.3 DG OS HSM C is also available in Nikon F (FX) , Sigma SA and Sony Alpha mounts.
Focal Range
Canon RF 600mm F11 IS STM is a prime lens with fixed focal lenght of 600mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
960mm.
On the other hand, the Sigma 150-600mm F5-6.3 DG OS HSM C has a focal range of 150-600mm 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 240 - 960mm.