Using my L series lenses on old film eos bodies

[gaz4266]

Hi

I have a 5d mk 3 with several L series lenses. I purchased a eos 1 film camera hoping to use my lenses, but im getting bad vignetting. Any ides how to over come this?

[kvbarkley]

You shouldn't, can you post an example? Are you using any filters or adapters?

[gaz4266]

Think Ive found the problem, theres no focusing screen in the eos 1