Nikon AF 20mm f/2.8D
This small wonder of a lens lets you shoot ultra-wide without going extra-large Released: 1994 Price new: £500/$625 Price used: From £315/$340 Less than two inches long and weighing just 270g, this Nikon lens is a slip of a thing. Don’t be fooled, though – it’s full-frame compatible and gives a mighty viewing angle of 94 degrees on the diagonal, and a respectable 70 degrees on a DX camera. It will autofocus on any current body that has a built-in motor, so the D7200, D500 and all full-frame bodies. For bodies without a built-in motor, the distance scale and depth-offield markings, along with the potentially large depth of field, make it ideal for zone focusing, or using hyperfocal distances.
The widest aperture of f/2.8 enables fast shutter speeds in low light, but vignetting is an issue at wide apertures. It’s not an issue for landscapes, though, where apertures of around f/8 to f/16 tend to be the norm. As well as ensuring good depth of field, these apertures also result in images that are pin-sharp across the whole frame.