First....Happy New Year to all.
When using the Bulb exposure or the remote shutter release, is it a good idea to cover the viewfinder eyepiece on a DSLR? In the pre-digital era, I remember reading that failure to do so will allow additional light to expose the film. Is this relevant with a DSLR?
My camera manual (Canon EOS 400D) does not mention this. And, as far as I know, an eyepiece cover isn't even available from Canon.
Thank you.