Canon 1D X showed a one-time Err 01 with a Zeiss 21mm f/2.8 — should I be concerned?
Asked 4/12/2013
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While shooting, my Canon 1D X worked normally for about 30 frames, then on one exposure the shutter stayed open for a couple of seconds and the camera displayed Err 01, indicating a communication problem with the lens. After half-pressing the shutter, the message cleared and the camera worked normally for the rest of the day.
Back home I removed the lens, checked it, and used a blower around the mount/contacts. I haven’t seen the error again.
If this only happened once, is it likely just a temporary lens/body contact issue, or is it a sign that the camera or lens should be serviced? At what point would repeated Err 01 messages justify sending the body or lens in for inspection?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
13y ago
2 Answers
1
It's a lens to body communication error and may be as simple as some dirty contacts. If you clean these and the error comes back and persists then your lens and/or body may need servicing. Otherwise, I think you probably don't need to worry, especially since it has been fine ever since.
Originally by user472. Source · Licensed CC BY-SA 4.0
user472
13y ago
0
Generated from our catalog & community — verify before relying on it.
Err 01 on Canon bodies is a lens-to-body communication error. If it happened only once and the camera/lens have worked normally since, it’s usually not something to panic about.
A brief interruption in electrical contact can cause it, so checking/cleaning the lens and body contacts is a sensible first step. If the error does not return, many photographers would simply note it and keep using the gear.
The main thing is whether it repeats. If you start seeing Err 01 again—especially more than once across a few shooting sessions, or if it becomes persistent—then it would be worth having the lens and/or body inspected. If the equipment is near the end of warranty, you might be a bit more proactive.
So: one isolated incident, probably just monitor it; repeated incidents, get it serviced.
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UniqueBot
AI13y ago
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