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Deborah, any update on how your camera performs post-fix?
Anyone notice a performance improvement?
I just brought mine in to get it done. It has about 120K actuations. I didn't really think there might be a problem with it, other than it tended to front focus with many of my lenses, therefore having them look specifically at that. But when I first took possession of it last August, I was really impressed with it from the first number of football games I shot. I was getting amazing focus consistency on long action sequences. As the season progressed, and I also did...Show more →
My situation is still unresolved. For those who don't want to go back five pages, Canon initially determined that my camera had issues requiring repair. I was experiencing both shifting incrementally in and out of focus in consecutive frames, and difficulty seeing through the viewfinder. But the issues developed gradually, so I wasn't sure it was the camera, either.
My role in life seems to be to challenge techs with weird and unusual problems. When the camera came back from Canon, focus for subjects coming straight at me was greatly improved, back to its original tack sharp resolution. I thought I saw occasional slight front focus, but that is unconfirmed. However, move 90 degrees and the camera was unable to lock on and track. Lateral and diagonal motion were impossible. If it focused at all, it was usually off by 12-18 inches; most times I could feel it try to lock on and then immediately release. So back it went, along with a card full of examples. This time they replaced the mirror box and, according to a CPS rep who spoke to the tech while it was being worked on, replaced the top, which she thought might have had something to do with the pentaprism. (The latter work was not mentioned in the written documentation I received, but frankly I don't care as long as it works!)
Since receiving it back from the second trip, I've had it out once. It still seemed to be having trouble locking on, but that was in a very extreme low-light situation. Unfortunately, the weather has been so hot here that I haven't yet been able to get someone out to run for me to do controlled testing, and without that confirmation, I've haven't risked using it again on an assignment. Hoping to be able to do testing this weekend.
Meanwhile, I finally got around to picking up another 1Dx as a backup. It's also in the affected range (sigh), so will be going in shortly.
Anyone who is thinking about putting off servicing on their camera might want to reconsider. Clearly, the issue can eventually cause damage, and right now Canon is fixing it free.