|
Nikkor AF 20mm f/2.8 D - Review / Test Report |
|
Lens Reviews -
Nikon / Nikkor (APS-C)
|
|
Page 1 of 2
Review by Klaus Schroiff, published May 2006
Lens kindly provided for testing purposes by Dirk von der Ehe!
Introduction
The Nikkor AF 20mm f/2.8 D is a full frame ultra wide-angle lens released
back in 1994. We have seen several design updates of most ultra-wide zooms
during the last years but for whatever reason most manufacturers didn't really
care for their wide-angle fix-focals recently.
On the D200 (used for testing) the field-of-view of the lens is equivalent
to 32mm so it's more a moderate wide-angle within the APS-C DSLR scope.
The build quality of the lens is very good and in line with most moderately
priced Nikkors. The outer barrel is made of good quality polycarbonate combined
with a metal mount. The small rubberized focus ring operates very smooth.
Compared to other lenses in this league the Nikkor is surprisingly small -
the corresponding Canon lens is 2.8cm or 65% longer for instance.
The lens has no internal AF motor and relies on a slotted drive screw
operated by the camera. Due to the very low weight of the optical system the
AF speed is very fast on the D200. The generated noise level is quite moderate.
The front element does not rotate so using a polarizer is no problem.
| Specifications |
|---|
| Equiv. focal length | 30 mm (full format equivalent) |
| Equiv. aperture | f/4.2 (full format equivalent, in terms of depth-of-field) |
| Optical construction | 12 elements in 9 groups |
| Number of aperture blades | 7 |
| min. focus distance | 0.25 m (max. magnification ratio 1:8.3) |
| Dimensions | 69 x 43 mm |
| Weight | 270 g |
| Filter size | 62 mm (non-rotating) |
| Hood | Nikon HB-4 (optional), barrel shaped |
| Other features | Lens provides distance (D) information to the camera. Close-Range Correction (CRC) system (floating elements). |
|
