The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Nikon 20mm f2.8D and the Nikon 14mm f2.8D ED 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 14mm f2.8D ED is the longer of the two lenses at 87mm. The Nikon 20mm f2.8D with a length of 43mm, is 44mm shorter. Besides being longer, the Nikon 14mm f2.8D ED also has a larger diameter of 87mm compared to the Nikon 20mm f2.8D's 69mm 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. Nikon 20mm f2.8D weighs 270g, which means it is 400g (59%) lighter than the Nikon 14mm f2.8D ED which has a weight of 670g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Nikon F (FX) Mount for size comparison purposes.
Wideangle Prime Lenses in Nikon F (FX) Mount for Size Comparison
Both the Nikon 20mm f2.8D and the Nikon 14mm f2.8D ED 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.
Nikon 20mm f2.8D is a prime lens with fixed focal lenght of 20mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 30mm.
Nikon 14mm f2.8D ED is a prime lens with fixed focal lenght of 14mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 21mm.