I don't know if this is a controversal subject or not but I see no problems with using photoshop to either adjust the levels or edit out something undesirable. At first I thought that I shouldn't touch the virgin image from the camera. I felt like it would be cheating or something like that. But, the more I thought about it, it seems like I should feel free to use all the tools I have to enhance my pictures. Afterall it's my art and it should look the way I want. Of course I'd never make major changes. But if there's a beer can in the lake, why not just get rid of it?