I tried a buddies eBay knockoff of the RC5 or 6 and it didn't seem to half press for focus. Is this normal on the genuine versions? I use a Yongnuo flash trigger for this type of setup and it work great but is a tad bulky in the bag. The RC-6 would be great in the bag.
Does the RC-1 works with the 5D3? I see it works with a 5D2 - I had one of these with an old film camera, worked great.