My camera manual for EOS 50D says I can use either BP-511A, BP-511, BP-512 or BP-514. The camera came with a single BP-511A. Does anyone know what A stand for? How is BP-511A different from BP-511? ...
If I remove the rechargeable BP battery from my Canon EOS 50D for an extended period of time, will the internal lithium battery preserve all of my settings (including custom functions, date/time, ...
I plan to use my Canon 50D in a studio, tethered to a PC. It would be great if it drew the power it needed from the USB bus rather than from the battery, so I wouldn't need to worry about changing ...