"David Geesaman" wrote in message
...
ian lincoln wrote:
"Per Ting" wrote in message
...
How these two compare, the price of cannon is slightly higher, but in
terms
of quality how do they compare. I am thinking of D70s with 18-70 kit
lens
and 20D with 17-85 IS lens. How do the lenses compare? Any suggestion
for
better wakl around lenses to go with each? I have heard good things
about
Sigma 18-50 and 18-200 lenses.

Thanks

Stay away from the sigma lenses. Vastly inferior.

Sigma snobbery at its finest.

Compared to the Canon L series, yes they range from somewhat inferior to
no comparison. However, for a user at the D70/20D price level, they have
their place. The 18-200 is great if you want to never change lenses, but
not great if you want to shoot wide open or can't tolerate a little
distortion or color issues.
Generally, the APO Sigma lenses are decent, and a great value for the
money. The 70-200 f/2.8 is an excellent lens, actually holding its own
against the Canon version if it's a good copy. The main difference
between the Canon and Sigma at any particular model (gotta compare apples
to apples), is the Sigma tends to have more variation in quality from one
copy to the next, and lower resale value. But they are decent step-up
lenses.

Some of Sigma's EX lenses do very well against Canon L lenses.