Will Canon 35mm camera lenses fit a new Canon SLR digital camera?

Absolutely! The only trouble I have had is with a 2X converter and a 400mm lens. It would not auto focus or stop down. I still got an OK photo of the moon. I migrated ALL my lenses successfully. I think film lenses work on digital. Digital do not work on film. Why not? Due to the .625 smaller area covered by the lens. They will not even mount. The answer above is right, but if you have any troubles with canon and canon lenses just feel free to contact Canon Support Team. Visit canon's official website and there you'll be able to find a link to their customer support.