> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Icoz, Evrim
> Sent: Tuesday, October 08, 2002 4:35 PM
> To: '[EMAIL PROTECTED]'
> Subject: RE: EOS Tele-zooms compared
>
>
> Peter,
>
> Since I use available light only I use f2.8 a lot. f8 for me is not that
> important, almost all lenses are pretty ok by then.
>
> I am surprised to see how sharp the Sigma is :)
>
> But sharpness is only part of the equation, I am convinved about
> this after
> getting the 80-200. The contrast and color rendition is very very
> important.
>
> Thanks for going thru the effort!
Hi Evrim,
Well for me and almost everyone else, shooting wide open is very useful,
personally I shoot WFO a lot. Don't be surprised at the Sigma lens'
measured optical performance, they are quite good. But as much as Peter
goes on about them they are not really better or even overall as good as the
data he is using indicates. The Sigma zoom using the data he has supplied
from Photodo is less sharp overall. The real winner is the older Canon EF
80-200 2.8L anyway you slice it based on this data anyway.
Before Peter gets all ballistic, chart it yourself and do an average of the
data points and measure the area under the curve. It doesn't matter if you
order the chart using focal length or apertures the Sigma is clearly not as
good overall and this is reflected in the Photodo rating. The Sigma has
other problems to go with the lower initial cost, which is very attractive
to many people myself included. But the reality of it is that if you want
to get a Canon lens fixed or serviced you will have an easier time of it and
the resale value of a Canon lens has been historically significantly higher
than any of the third party lenses so. So in reality there is very little
cost difference, a real difference in terms of performance optically and in
terms of service and support.
Cheers/Chip
*
****
*******
***********************************************************
* For list instructions, including unsubscribe, see:
* http://www.a1.nl/phomepag/markerink/eos_list.htm
***********************************************************
