Nikon 50mm f/1.8 AF (oldest AF version, 1986-2001)
Nikon 50mm f/1.4 G AF-S (f/1.4 version, 2008-)
Nikon 50mm f/1.4 AF-D (older version of f/1.4, 1986-)
Ideal for: Perfect for use on FX digital, DX digital and 35mm film. On DX cameras, the viewfinder is usually at close to 100% magnification, making two-eyed shooting easy.
Not for: Rich people who just don't feel right unless they pay a lot of money for something, or people who need no distortion, for whom the Nikon 50mm f/1.8 AF-D has less distortion for half the price. Otherwise, everyone needs some sort of 50mm f/1.8 and not much more.
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This Nikon 50mm f/1.8 G is Nikon's latest iteration of their classic 50mm f/1.8 lens, first introduced in 1978. This new version adds the first new optics since 1978, and updates the traditional screw-focus system of 2002's Nikon 50mm f/1.8 AF-D with a modern AF-S system. Therefore, this new lens allows instant manual-focus override simply by grabbing the focus ring at any time.This is Nikon's first aspherical 50mm lens. Nikon's only other aspherical normal lens is the 58mm f/1.2 Noct-NIKKOR, which sells used for thousands of dollars.
This is the world's first 50mm f/1.8 that autofocuses on Nikon's cheapest DSLRs like the D3100 and D5100.
The previous 50mm f/1.8 lenses have always been stellar optical performers, as is this new lens. This new 50mm lens is among Nikon's sharpest, but so are most 50mm lenses from every maker.Everyone needs a 50mm lens, and it's about the only lens you'll need. This 50mm f/1.8 G is super sharp, focuses perfectly, and has superb bokeh as well.This 50mm f/1.8 G is one of Nikon's best lenses at any price, and also one of their least expensive.
For use on Nikon's cheapest DSLRs like the D40, D40x, D60, D3000, D3100, D5000 and D5100, the Nikon 50mm f/1.8 AF-S G is the best 50mm lens one can get, next to the 50mm f/1.4 AF-S. No other Nikon 50mm lens will auto focus on these cameras.For all other Nikon DSLRs and Nikon AF cameras made since about 1990, the Nikon 50mm f/1.8 AF-D does the same thing for half the price, however this new "G" lens offers a much tougher mechanical design and significantly better ergonomics because one can just grab the manual focus ring at any time for instant manual focus override.
On AF cameras older than about 1990 and on manual-focus 35mm cameras, this G lens won't work at all. Get the Nikon 50mm f/1.8 AF-D instead.This 50mm f/1.8 G lens is super-duper sharp, but sadly has some visible barrel distortion on FX and 35mm. If this is important to you, use the Nikon 50mm f/1.8 AF-D. I see no real need for the 50/1.4 G lens, since I prefer Professional exposure mode (P), and I prefer in low light to shoot at f/1.8 instead of f/1.4, which is what happens with either of these lenses in Professional mode as it gets dark. If you already own the 50/1.4 G, you may ignore this lens, since they have pretty much the same optical performance and size. As always, Nikon introduced the twice as expensive f/1.4 three years before this f/1.8 so that folks like me would buy the more expensive version instead; but today, get the f/1.8 for digital. Save the super-hot f/1.4 for 35mm shooting.