The Canon 5D Mark ii - Exposed

Well if you haven't noticed I like to tinker. I always have and probably always will. So when I get bored I fix things, all sorts of things. A while back I started repairing digital cameras for fun. Recently after I bought my D300 another damaged D300 came up for sale that had taken a humpty-dumpty fall from a tripod with a 70-200 2.8 attached. I bought it for parts just in case anything happened to my new D300, but after ordering a new button I had it all fixed up. Its now my backup camera to my other D300.

So last month I was reading about a Canon fellow that had the misfortune of having his newly acquired Canon 5D mark ii fall into a lake while setting up for a shot. I bought the camera from him for salvage to see if I could get it working. I figured best case I could and then I'd play around with it to see what Canon has to offer. Worst case I'd end up parting it out eventually to recoup my money. Since I fixed the Nikon so fast that I never got a chance to document any of it,I figured I'd document the tear down of this camera body as it might be of interest to someone out there.

I even made a pointless video that I sped up showing the partial tear down. The video isn't the best as it was my first time trying to do something like this, but you can see as I strip away the rear, top and side panels of the 5D2 to expose and inspect the inside for water damage. I found very little water exposure on the first time tearing it down, but on later tear downs to find the odd behavior it was giving I found the board that was lightly corroded.

Here is the main culprit, it was the board on the bottom of the body. There was corrosion on 3 of the ribbon connector areas and 2 of the surface mount ICs. I carefully cleaned them off and sprayed the entire board down with a 0 residue PCB contact cleaner. The camera has been flawless ever since, but only time will tell, and with water damage you never know for sure, corrosion can kill very slowly and create odd issues with systems, in this case the buttons acted irrational and certain shooting modes would do different things.

I have since cleaned all the corrosion off and its working fine, although I do plan on ordered a new board from Canon at some point. I bought one lens for use with it, and one flash and I will be documenting some of the obstacles I found using off camera flash with Canon. I will also show some hacks to get things to work, like rear curtain sync and high speed sync.

One other side note, the body construction of the 5D2 I was not particularly impressed with for a camera in its price class. I would have expected a stamped steel frame in the lower end bodies, but not in one thats a notch from the flagship. This is my own personal opinion however having seen both the D300 and 5D2 on the inside. The D300 skeleton looks like its battle ready, a large cast body wrapped in plastic, the 5D2 had a simple and not rugged design. Also I really wish there was some solid weather sealing, I didn't see any o-rings at all on the 5D2.

More to come later...