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| p.2 #9 · p.2 #9 · 1DX owners - Excessive oil and spots in VF and on sensor |
I've also commented in the links on the other forums about this issue. I bought mine in September from B&H, and it also was an "8" in the serial number (not sure if that batch has its own problems or not!). The next day, I noticed a couple dark black spots in the upper right corner of the viewfinder. I ended up sending it to Canon for servicing, and they did clean out those spots, under warranty (this went to the Virginia facility). I didn't notice any spots on the sensor, though I haven't been carefully looking for these spots (perhaps out of denial).
After it was serviced, I had the black mark applied to the battery compartment.
I've noticed some new spots since the servicing in the viewfinder, but these seem smaller than before, not as noticeable, and they're in the upper part of the viewfinder.