The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang Premium MF 85mm F1.2 and the Canon 400mm f5.6L USM 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 400mm f5.6L USM is the longer of the two lenses at 257mm. The Samyang Premium MF 85mm F1.2 with a length of 98mm, is 159mm shorter. On the other hand, the Samyang Premium MF 85mm F1.2 has a larger diameter of 93mm compared to the Canon 400mm f5.6L USM's 90mm diameter.
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. Samyang Premium MF 85mm F1.2 weighs 1050g, which means it is 200g (16%) lighter than the Canon 400mm f5.6L USM which has a weight of 1250g.
Lens Mounts
Both the Samyang Premium MF 85mm F1.2 and the Canon 400mm f5.6L USM has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon 1D X III, Canon 6D MII and Canon 5D MIV.
Focal Range
Samyang Premium MF 85mm F1.2 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 a 35mm (FF) equivalent of
136mm.
On the other hand, the Canon 400mm f5.6L USM is a prime lens with fixed focal lenght of 400mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 640mm.