Sunday, May 25, 2008

Lens Review - nikon AF nikkor 20mm f/2.8D

nikon nikkor AF 20 mm f/2.8D (1994 Release) FACTORY SPECIFICATIONS

Focal Length : This is a Ultra Wide FX format lens, so you can both use them on typical SLR 35 mm cameras and D-SLRs. But on a D-SLR camera, it will effect like 30mm.
Aperture: f/2.8 . Seven-bladed rounded diaphragm stopping down to f/22
Optics: 12 elements in 9 groups. No ED glass elements or aspherical elements.
Closest Focus: 25 cm(0r 10 inches)
Macro Ratio: 1:8.3
Filter size: 62mm Non-rotating
Accesories: Lens rear/front caps, Barrel shaped, plastic HB-4 Bayonet Lens Hood (optional) . CL-30S Lens case is optional.
Dimensions: 69 mm diameter. Length is 43 mm.
The Nikkor 20mm f/2.8 is quite sharp but equipped with some flaws. According to IMATEST results, barrel distortion is 2,3% , very high for field conditions. Vignetting is also high at widest aperture, but not field relevant after f/4. MTF Resolution results are excellent starting from f/4. Chromatic Aberrations are field relevant. (limit is 1 pixel, test results are around 2 pixel)

- Very high barrel distortion for a fixed focal length lens.
- Very high CA's for a prime lens.
- A good lens in the film era, but not good for D-SLR's

VERDICT : It is not a cheap lens with a lot of flaws. It's compact and lightweight design can be attractive only.. Recommended (7/10)



dsi r4 said...

This is a fine Nikon lens made in Japan, very quality built, a trust-worthy kind of lens that will last for a life time. It is very sharp and fast, colors are warm and fine, and the frame is just ridiculously wide if you use it on a film or FX. This is a perfect choice for those who would like to have an extraordinary wide, fast and quality prime lens for less money.

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