The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 800mm F11 IS STM and the Canon RF 85mm F1.2L USM DS for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Canon RF 800mm F11 IS STM is the longer of the two lenses at 352mm. The Canon RF 85mm F1.2L USM DS with a length of 117mm is 235mm shorter. On the other hand, the Canon RF 85mm F1.2L USM DS has a larger diameter of 103mm compared to Canon RF 800mm F11 IS STM's 102mm diameter.
Below you can find the scaled side by side image of Canon RF 800mm F11 IS STM and Canon RF 85mm F1.2L USM DS to get a better idea of how their size compare in real life.
Comparison image of Canon RF 800mm F11 IS STM and Canon RF 85mm F1.2L USM DS Size and Weight Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Canon RF 85mm F1.2L USM DS weighs 1195g, 5% (65g) lighter than the Canon RF 800mm F11 IS STM's weight of 1260g.
Below you can find the dimension and weight table of the 'Telephoto Prime Lenses in Canon RF Mount for size comparison purposes.
Telephoto Prime Lenses in Canon RF Mount for Size Comparison
Lens Mounts
Both Canon RF 800mm F11 IS STM and Canon RF 85mm F1.2L USM DS has the same Canon RF lens mount. Some of the latest released cameras that are compatible with the Canon RF lenses are Canon R6 II, Canon R10 and Canon R7.
Focal Range
Canon RF 800mm F11 IS STM is a prime lens with fixed focal lenght of 800mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 1280mm.
Canon RF 85mm F1.2L USM DS is a prime lens with fixed focal lenght of 85mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 136mm.