Re: [PRODIG] Introduction+problem with (Canon) lens distortion

[Andrew Lopez-Calvete]

I'm on my third Sigma 17-35mm for my 10D. The first one wouldn't stop 
down (needed re-chipping by sigma) the second was a little out of focus 
at 35mm and way soft at 17mm. The third one seems a whole lot better, 
but at full frame on the preview monitor (11 clicks on the enlarge 
button) images shot at 17mm are either slightly out of focus or just 
very soft compared to my nearest canon comparable lens which is a 20mm 
prime. Sigma deny there is a compatibility problem other than the 
lenses that need to be re-chipped, and the results from the 10D shot 
with my many and various canon lenses are all fine, so I don't 
subscribe to the 10D focus problem 'urban myth'. Has anyone else had a 
problem with third party lenses or is there an issue with the sensor 
and wide angle lenses as I have never tried a canon 16-35 with the 
camera as a comparison?

Calvers

On Tuesday, Nov 4, 2003, at 13:51 Europe/London, John Cole wrote:

Hi Rodolpho,
I hadn't heard of that one, but I do have a 14mm Sigma for 35mm, which 
suffers very badly from internal reflections; virtually unusable 
against the light.
John

At 13:34 04/11/2003, you wrote:
Sigma launched a 12~24mm for many mounts, I don�t know if it�s already
available. Read on: 
http://www.dpreview.com/news/0310/03101801sigma1224.asp
. Unlike the Nikon, this one will cover the full area of 35mm frame.
Rodolpho Pajuaba
www.pajuaba.com.br

Hi Kim,
I've been waiting for a wide angle solution, apparently there is a 
problem
with the pixels using a normal 17mm for example with a full 35mm sized
sensor, so I have opted for the Nikon 12-24 zoom, which is superb, 
equating
to an 18mm at its widest. Results with a 6Mp camera are staggering!

What I am after now is a 10mm rectilinear!

All the best,
John
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