Nikon AF-S 50mm f/1.8G

'Nikon AF-S 50mm f/1.8G'

There was a time when almost every 35mm film camera came with a 50mm prime (fixed focal-length) lens because on a full-frame camera, the 50mm focal length captures roughly the same angle-of-view as is seen by the human eye. Today, 50mm primes have two further appeals; they provide a good focal-length for portraiture on APS-C digital cameras and they often have a very wide maximum aperture with which to exploit creative focusing techniques.

Nikon's G-series 50mm f/1.8 lens is an excellent example of its type and feature the same deeply-recessed front element design that has been seen on Nikon's standard primes for decades. The front half of the barrel is given over to a manual focusing-mode switch. When AF operation is set, manual intervention can be applied at any time. The feel of the manual-focusing ring is excellent, with a silky movement and just the right amount of resistance over an approximately 100 throw. The feel is the same regardless of which focusing mode is selected. There is a nod towards the provision of depth-of-field information but this is nothing more than a small and easily-missed pair of indices for the near and far in-focus regions at f/16.

The smallest aperture o f/16 may seem limiting given that apertures of f/22 and beyond are typically found on most lenses, but in fact this tactic helps to maintain top-notch image quality across the range.

Focusing is carried out quickly and quietly when the AF mode is set to M/A (manual/auto), and manual intervention works seamlessly. It’s also good to see a weather seal at the back of the lens. Image quality was either very good or excellent in every case.

Not only is a lens hood provided, which reverses over the lens for storage, but also there is a soft carrying pouch. Some users might worry about the prime’s low mass in case this indicates a prevalence of plastic rather than metal but there is nothing warm of any problems in this respect.

MTF (Modular Transfer Function) testing returned excellent results for full-frame images and the lens would easily have taken maximum points here were it not for the spontaneous decision to reshoot the test targets on a DX format (APS-C) sensor. There were clear sign of chromatic  aberration under these conditions though it is clear that this is due to the lens itself. And this weakness was not seen in real-world images except as the very faintest trace.

Overall, 50mm primes can look outdated in a world where zooms are dominant but they are often high performers despite their low prices. There is little to fault in Nikon’s lasted G-series 50mm lens. If you want the simplicity and purity of a standard prime on a full-frame body, or a modest portrait lens on an APS-C body, this lens is like to be a very satisfying purchase.