We're really sorry for these problems. They are different problems for sure. we saw the Error 70 on the 550D at photokina on a customer's camera, and are already getting one to figure these out. The 5Dmk2 issues are new to us and sound very different. Thanks for reporting these. Do you have any cha...

Hi, received my C2 yesterday and today trying it out. I have C2 serial number 001695 and a Canon 5D mark ii with firmware 2.1.2. On entering the app all the features are greyed out and, many say that the camera doesn’t support the feature (mode and Tv), Av sayslens not attached or locked (which it i...