That's really pretty good for a wide angle lens. I'd say it's maybe half a stop darker in the corner than at center. Maybe a bit more. That's assuming that the light blue Perl books are the same shade of light blue across the bookshelf.
I was wmdering how much was due to the flash too. - It looks like there was an on-camera flash - It looks like it was quite close to the book shelf. - The flash to book distance is comparatively a lot further at the edges of the frame. I'd be more interested in seeing a ambient lit subject, such as a factory wall. But even then, falloff is inevitable at the corners of a wide angle lens. I'm only surprised that in the digital age someone (Canon?) isn't developing "characterised" lenses and auto-correction algorithms - automatically adjusting sensor gain on a pixel by pixel basis according to focus, aperture and zoom setting. While they were at it they could characterise the lenses for geometrical distortions etc and have the software option to unravel them ... might be cheaper to sort out distortions in software than at the lens design stage. Wouldn't that be something? B * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
