Archive for June, 2009

17-85mm kit lens

Posted in Uncategorized on June 30, 2009 by Richard

When I first read that my 17-85mm kit lens had a significant drawback, ie, light fall-off at wide angle, I thought “<groan> I have a crummy lens.” But then I found this:

http://www.cameralabs.com/features/Canon5D_upgrade/page4g.shtml

With a (full-frame) Canon 5D and 24-105mm L lens, the light fall-off is twice as bad! So I shouldn’t feel bad about my 17-85mm. Light fall-off is a persistent problem with full-frame bodies and wide-angle lenses, in general.

The Race to High ISO

Posted in Uncategorized on June 30, 2009 by Richard

http://www.cameralabs.com/reviews/Canon_EOS_5D_Mark_II/noise.shtml

As good as the 5D Mark II is, this examination of high ISO noise shows me one thing:  above 3200 ISO, IQ is generally crap, regardless of what body from what manufacturer. Looking at the pictures, the 5D Mark II at 6400 ISO is decent but I wouldn’t be happy with it.

Consider the D700:

http://www.cameralabs.com/reviews/Nikon_D700/noise.shtml

Again, at 6400 ISO, it’s decent but I wouldn’t be happy with it.

So in general, this race to high ISO is much like the race to high megapixels:   it’s bogus crap.