Thursday, I was shooting a time lapse sequence for work. It was a the second day into the 4 day shoot when I heard the words "I s#$%!. I just knocked over the camera". I walked over to see what happened and there was my 5D and the 17-40 lens laying on the ground. The lens hood popped off and outer lens ring was laying next to the lens. The red O-ring was around the focus ring as was the threaded spacer ring. The camera had the obvious dings and scratches. When I checked it all out, the camera was staying on even in the off position.
Once I reassembled everything, I set the camera back on the tripod and began shooting again. It still shoots fine but I have to remove the battery to get it to turn off. I shot through today and then took it into Mike's Camera in Boulder. The good news is, I will know what the issue is in 3 days, the bad news is, it is a 3 week repair time frame. OUCH. I will now pull out the old Rebel XTi to carry me through the repair process.
While at Mike's Camera, I did get the Cokin graduated neutral density filter system. I have never used an ND filter. We'll see how it goes. I hope to learn a few things from Randy Van Winkle
The only other ND filter I am thinking I might want is a full ND filter. Stay tuned for more photos coming.