Quite as sharp as my old 20mm f/4 AI manual focus. Tote it around instead of the fat $1,500 17-35mm AF-S. The new 20mm f/1.8G is far better optically.ĪF 20mm all the time because it's small and easy to use. Ring is held tight that one can jiggle the front of the lens around Panorama Tools coefficients for use on FX are:Īn AF lens, there is enough play in the mechanics so even if the focus I'd leave it alone unless DxO has a profile. Lens distortion tool can't do much, since it's complex distortion. It has the same distortion at all distances. In the central area of the image, and tends to straighten out at This is most likely due to mechanicalĬomplex distortion signature on FX and film. IĪlso find that with a Tiffen 62mm filter that the upper right vignettes

It has theīest ghost performance of any 20mm I've tested, and second only to the 17-35mm AF-S You can forget the lens hood, youĬoma (fuzziness) wide open in the corners typical to Nikon wide angleĪ bit softer in the lower left than in the lower right corner. You are pretty safe with the sun in your image.

I have heard that the 62mmī+W slim mount polarizer works OK, too. I get slight vignetting with Tiffen, Hoya,ī+W, Heliopan and most other filters. Is no vignetting when used with a Nikon brand filter. See also Nikon 20mm lens falloff comparison for much more. Theġ7-35mm zoom is much better if this is important to you. Illumination falloff at f/2.8 and it's gone by f/5.6 or f/8. (256.8g), measured, AF version.Ģ014 October: $570 new or about $325 used.Ģ011 October: $570 new or about $375 used.Īlmost instantaneous on an F100. It has CRC, close range correction (floating elements). Intro Specs Performance Compared Recommendations

Today's AF-D version adds distance coupling to the camera for slightly better exposure control with flash, otherwise, today's lens is the same as the first AF version, which has the same optics as the manual focus version of 1984. Same part as from the 20mm AI-s manual focus lens. Internal, engraved metal focus distance indicator appears to be the It has exactly the same optics as the manual-focus lens. Nikon's first autofocus ultrawide lens is the 20mm f/2.8 AF. Nikon's manual-focus 20mm f/2.8 AI-s lens is also made today, and has more precise mechanics than this autofocus lens. It is a wonderful lens, and often my preference over any of Nikon's bigger and heavier ultrawide zooms. Nikon 20mm f/2.8 AF was introduced in the spring of 1989, and today is still Nikon's smallest and lightest ultrawide lens. I use Adorama, Amazon, eBay, Ritz, B&H, Calumet, J&R and ScanCafe.

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