Roger Salls wrote:
A fiend called me with the following problem. She was shooting her son's HS football game, filled a card, went to put in a new card and the camera wouldn't read that card or any other card. The 50d kept saying either"cannot read card", "format card for this camera", "busy", "error 02". I took the cards downloaded the images and formatted the card in my computer. We also tried formatting in camera. Help!!
I had a similiar problem with my Rebel XSi. It was my walking around snapshot camera. The card worked fine in my 550D but the XSi wouldn't read any other cards. It kept saying "No card in camera." I put the XSi aside with the intent of taking it to my local camera shop. It sat there for probably two weeks. I accidentally took it one day when I was leaving and when I turned it on everything worked fine. I think maybe some Nikon electrons invaded my Canon house.