> I am more than happy to trade in the 17-40 for a prime lens if this > would really help but it's a shame that a lens supposedly designed for > digital is SO poor on the 1DS in bright light. Any less dastic advice > would be welcome.
Hi I tried a 17-40 and compared it to the 16-35. The differences on my 1Ds were very noticeable and I went straight for the 16-35. I've been using it a fair bit lately and have found that I can get rid of most CA with CS raw import. Plenty of shots of sparkling mountain streams in bright sunlight at 9000 feet are showing no great problems :-) As an aside, I've found the CA removal particularly good in sharpening up the edges when I'm converting the images to black and white. Depending on which conversion technique I use it can show a noticeable improvement. I'm only checking the images on a laptop at the moment, so I'll have to see how it goes when I get back to do some prints... bye for now Keith Cooper Northlight Images http://northlight-images.co.uk Photography - Digital Imaging - Apple Mac Consultancy Tel +44 (0)116 291 9092 Mobile +44 (0)780 162 9397 =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
