The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 1200mm F8L IS USM 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 1200mm F8L IS USM is the longer of the two lenses at 537mm. The Canon RF 85mm F1.2L USM DS with a length of 117mm is 420mm shorter. Besides being longer, the Canon RF 1200mm F8L IS USM also has a larger diameter of 168mm compared to Canon RF 85mm F1.2L USM DS's 103mm diameter.
Below you can find the scaled side by side image of Canon RF 1200mm F8L IS USM 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 1200mm F8L IS USM 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, 64% (2145g) lighter than the Canon RF 1200mm F8L IS USM's weight of 3340g.
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 1200mm F8L IS USM 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 1200mm F8L IS USM is a prime lens with fixed focal lenght of 1200mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 1920mm.
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.