The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang AF 85mm F1.4 F and the Nikon 800mm f5.6E FL ED VR for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Nikon 800mm f5.6E FL ED VR is the longer of the two lenses at 461mm. The Samyang AF 85mm F1.4 F with a length of 75mm, is 386mm shorter. Besides being longer, the Nikon 800mm f5.6E FL ED VR also has a larger diameter of 160mm compared to the Samyang AF 85mm F1.4 F's 88mm diameter.
The 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. Samyang AF 85mm F1.4 F weighs 480g, which means it is 4110g (89%) lighter than the Nikon 800mm f5.6E FL ED VR which has a weight of 4590g.
Below you can find the dimension and weight table of the Telephoto Prime Lenses in Nikon F (FX) Mount for size comparison purposes.
Telephoto Prime Lenses in Nikon F (FX) Mount for Size Comparison
Lens Mounts
Both the Samyang AF 85mm F1.4 F and the Nikon 800mm f5.6E FL ED VR has the same Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (FX) lenses are Nikon D6, Nikon D780 and Nikon D3500.
Focal Range
Samyang AF 85mm F1.4 F is a prime lens with fixed focal lenght of 85mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 127.5mm.
Nikon 800mm f5.6E FL ED VR is a prime lens with fixed focal lenght of 800mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 1200mm.