D80 vs. Rebel XT

Started Feb 24, 2007 | Discussions thread
packy Veteran Member • Posts: 4,540
Re: 18-200 VR

fooblah wrote:

packy wrote:

Also you are a one lens man at the moment. I have the 18-200VR and
Sigma, Tamron and Canon have not yet produced as good a lens IMO.
Yes, it may be hard in getting one, but it would be worth the wait.
They are in abundance in my camera store here in Ireland. I bought
two off the shelf at two different occasions and my buddy walked in
and bought one as well recently. Even today while I was in there
ordering the Sigma 10-20, there was another one on the shelf as
well! They cost €800 (about $850-900), not bad considering we have
very high taxes here in Ireland.

Nikkor AF-S 18-200mm f/3.5-5.6 G IF-ED VR II DX Review / Test Report

Extreme zooms tend to suffer from rather hefty distortions and the
AF-S 18-200mm is no exception in this respect. In fact the amount
of barrel distortions (4.1%) at 18mm broke a new negative record
beating the Canon EF-S 17-85mm IS by a fraction. At 24mm the
distortion characteristic is neutral before turning into very
pronounced pincushion distortions beyond. All in all one of the
worst performances here.

The AF-S 18-200mm DX is a reduced image frame (APS-C) lens so
vignetting is far more pronounced compared to full frame lenses.
Typical for standard zooms the vignetting is worst at 18mm @ f/3.5
where it exceeds 1EV in the image corners. Stopping down to f/5.6
is a good idea here. The situation eases significantly in the
middle range before increasing again towards 200mm. The amount of
vignetting is relatively modest here even at wide-open aperture.

Typical of extreme zooms the resolution varies significantly across
the zoom range. At 18mm the center performance is excellent whereas
the borders follow quite a bit behind. At f/5.6-f/11 the border
performance is very decent including good extreme corners. The
sweet spot of the lens is around 24-50mm with an excellent center
and much improved borders. At 100mm the lens showed a rather
pronounced performance drop at wide-open aperture - the center
performance is still very fine here but the borders were very soft.
However, stopping down to f/8 helps to resolve the issue. At 200mm
the resolution figures are pretty decent again.

The lens showed quite pronounced field curvature and high residual
spherical aberrations (focus shift when stopping down) at the wide
end of the zoom range.

Regarding some glowing reviews available on the web the expectation
were rather high. Unfortunately the (tested sample of the) Nikkor
AF-S 18-200mm f/3.5-5.6 G IF-ED VR II DX wasn't able to convince
completely. Weak points are rather hefty distortions and high
vignetting (@ f/3.5) at 18mm. Apart from a few weak spots the
resolution figures are quite good though and it is possible to get
very decent images from this lens under field conditions. The VR
can surely help to save the day in situations where similar zooms
must fail utterly The build quality is a little soso for a lens in
this price class and probably the biggest disappointment. All in
all the Nikkor is a highly interesting lens but not without flaws
(hardly surprising for a 11x zoom).

I'm happy with my 18-200VR for most general purpose stuff contary to this review. And there are like minded users who are happy as well.

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http://homepage.eircom.net/~vmax ; for my pic stuff

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