Zig Zags

[Meng]

Thank you Iguanasan, I do shoot only in Raw format and edit that and always save JPEGS at 100%, as those shots were, and this is what is confusing me. All I've read about aliasing says it becomes more apparant as the photo is cropped and this is exactly the opposite, when I crop or zoom these kind of shots it becomes less apparant. I'll keep searching for information.

[Andrew]

This copy we're seeing at 72dpi is a version that is showing at 100% a 800 x 533 pixels and there are similar problems throughout the photo. It's been chopped down but so have the others. If it was a common problem I'd expect to see some in the second and third photo in high contrast areas around the plane's window. Does the original look OK? Did you do something to the top photo like crop it before you saved it? Your other photos do have aliasing but up at 200% where I'd expect to see some.

[Meng]

This copy we're seeing at 72dpi is a version that is showing at 100% a 800 x 533 pixels and there are similar problems throughout the photo. It's been chopped down but so have the others. If it was a common problem I'd expect to see some in the second and third photo in high contrast areas around the plane's window. Does the original look OK? Did you do something to the top photo like crop it before you saved it? Your other photos do have aliasing but up at 200% where I'd expect to see some.

Andrew these are Flickr linked so I have no idea what they did with the final image displayed here but the original Raw image has this in it. It was taken with a Canon 40D and a Canon 24-105 f4L IS, this lens has a reputation for being very contrasty. Maybe the anti-aliasing filter in the camera isn't strong enought to deal with it or it's failing, if that's possible. Anyway I thank you for taking the time to think about this, I'll either figure it out or just accept it as a limtation of this body/ lens combination.