|
Nikkor 18-200mm uniformity, wide angle, tested with Nikon D2X
|
To measure lens vignetting and light fall-off we photographed a white
target with a highly diffused custom filter. The lenses were tested at their
widest focal length with the aperture wide open using a Nikon D2X in Aperture
Priority mode. The images were analysed with Imatest and the full areas
presented here at a reduced resolution. Bigger percentages are better.
With light falling off to an average of 62.2% in the corners, the Nikkor
18-200mm VR performs comfortably better than the Sigma and Tamron models
when set to wide angle. Vignetting is much more apparent on these cheaper
lenses at wide angle. |
Nikkor AF-S DX VR 18-200mm 3.5-5.6G IF-ED |
|
Sigma 18-200mm F3.5-6.3 DC |
|
Tamron AF18-200mm F3.5-6.3 XR Di-II LD IF |
|
|
|
|
|
18-200mm at 18mm f3.5
Mean corner fall-off: 62.2% |
|
18-200mm at 18mm f3.5
Mean corner fall-off: 53% |
|
18-200mm at 18mm f3.5
Mean corner fall-off: 52.6% |
Nikkor 18-200mm uniformity, telephoto, tested with Nikon D2X
To measure lens vignetting and light fall-off we photographed a white
target with a highly diffused custom filter. The lenses were tested at their
longest focal length with the aperture wide open using a Nikon D2X in Aperture
Priority mode. The images were analysed with Imatest and the full areas
presented here at a reduced resolution. Bigger percentages are better.
Zoomed-in to their longest 200mm focal lengths, all three lenses perform
quite similarly, although the Tamron takes the lead in this test. |
Nikkor AF-S DX VR 18-200mm 3.5-5.6G IF-ED |
|
Sigma 18-200mm F3.5-6.3 DC |
|
Tamron AF18-200mm F3.5-6.3 XR Di-II LD IF |
|
|
|
|
|
18-200mm at 200mm f5.6
Mean corner fall-off: 73.4% |
|
18-200mm at 200mm f6.3
Mean corner fall-off: 72.9% |
|
18-200mm at 200mm f6.3
Mean corner fall-off: 79.7% |
|
