EOS R6 Mark II Error 20

[hiroshi87]

hi, I recently purchased an R6 MKII, I have shot about 300 photos with it and now every once in a while I get an error 20. The only way I can clear it is by taking off the lens and replacing it. When the lens comes off, the sensor is exposed, and then the shutter closes. It clears the error, but it still happens intermittently. Should I just take it back and get another one? I am mostly shooting with the RF 35 1.8. Not sure if that has anything to do with it.

Advice?

[deebatman316]

When exactly does the error message pop up. Does it pop up as soon as the camera is powered up. Or does it pop up after taking pictures. DO NOT remove the lens when the camera is powered up. Some lenses have a power retract feature. The lens WILL NOT retract if the lens removed from the camera body. Potentially causing error messages. Due to lens elements not being in the storage position when the camera is powered.

[Tronhard]

Further to Demetrius' statement, another reason not to take the lens off when powered up with any camera, but especially a MILC, is that the sensor is energized and will attract dust through the open lens mount.  The shutter is supposed to come down before the lens is removed to protect the sensor - it's clearly stated in the first few pages of the manual!
I  would check the viability of the battery to make sure it is providing the correct energy level to operate the camera - that is a very non-intrusive experiment.

The next step is to call 1-800-OK-Canon and have a chat to their tech support people.  They can advise you about possible solutions in a discussion, and from there you can lodge a warranty fix with confidence, if necessary.

[deebatman316]

Correction: Great point on the exposed image sensor. For the R10 & RP the shutter curtains don't come down to cover the image sensor when powered off. It was introduced with the original EOS R. The EOS M series doesn't have that feature either. But it is a nice feature to keep the image sensor clear of dust when changing out lenses.

[Tronhard]

Yes, it's a perfect example of you get what you pay for.  The cheaper models don't have the shutter protection mechanism, which I honestly think should be standard on all MILC cameras that have a shutter.  It will be interesting when Canon go to no mechanical shutter, as Nikon have done.

[deebatman316]

Correction: Apparently the R10 doesn't have this feature either. I'm not sure if there any other R series than the RP & R10 that don't have this feature either. The EOS R does have this feature. I was mixing up camera models.

[Waddizzle]

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@deebatman316 wrote:

Great point on the exposed image sensor. When I tested out the R & RP the shutter curtains didn't come down to cover the image sensor when powered off. I think that was introduced with the R5 & original R6 models. The EOS M series doesn't have that feature either. But it is a nice feature to keep the image sensor clear of dust when changing out lenses.

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The EOS R and RP should also drop their mechanical shutters when the camera is powered down.  I believe they were the first MILC bodies to cover the sensor when the lens was removed.  Other manufacturers have quickly copied the feature.

[deebatman316]

Correction: The R10 & RP Do NOT have that feature. Nor is it mentioned in the manuals for those cameras. The EOS R has this feature. But I think all new R series cameras include this feature now. I'm not 100% on that though.