My 7D dies some times

Le Kilt said:

Sorry, my words came across harsher than they were meant.

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jpr2 said:

I had such freezing happen to mine 7d few times at the very
beginning - exactly the same symptoms and remedies; however,
it occurred to me that the culprit might be oxidized contacts - and
indeed after cleaning them on the camera side the effect disappeared
for good = not a single case for over 1.5 yrs. It well might be that
changing lenses often takes care of a little oxidization that may
happen in the meantime,

jpr2
--
~
street candids (non-interactive):
http://www.flickriver.com/photos/qmusaget/sets/72157609618638319/
music and dance:
http://www.flickriver.com/photos/qmusaget/sets/72157600341265280/
B&W:
http://www.flickriver.com/photos/qmusaget/sets/72157623306407882/
wildlife & macro:
http://www.flickriver.com/photos/qmusaget/sets/72157600341377106/
interactive street:
http://www.flickriver.com/photos/qmusaget/sets/72157623181919323/

Comments and critique are always welcome!
~

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Oli R said:

Have you tried just opening the battery grip door then shutting it, I say this because the 7D will not power up if it thinks the door is popped open and if it pops open when on it will turn the camera off. So the problem could be the 7D thinking the battery grip door has come open, nothing to do with the batteries themselves. Worth investigating....

Click to expand...

• polished lens contacts with a microfibre cloth;
• and as body contacts are quite complex assemblies of rods+springs, so it is not possible to clean them thoroughly without a major dismantling job, I'd just turned lens many times still inside the mount (without actual removal) to give it as much chance that a possible layer of oxidants will be broken as one could in field;

David Naylor said:

jpr2 said:

I had such freezing happen to mine 7d few times at the very
beginning - exactly the same symptoms and remedies; however,
it occurred to me that the culprit might be oxidized contacts - and
indeed after cleaning them on the camera side the effect disappeared
for good = not a single case for over 1.5 yrs. It well might be that
changing lenses often takes care of a little oxidization that may
happen in the meantime,

jpr2
--
~
street candids (non-interactive):
http://www.flickriver.com/photos/qmusaget/sets/72157609618638319/
music and dance:
http://www.flickriver.com/photos/qmusaget/sets/72157600341265280/
B&W:
http://www.flickriver.com/photos/qmusaget/sets/72157623306407882/
wildlife & macro:
http://www.flickriver.com/photos/qmusaget/sets/72157600341377106/
interactive street:
http://www.flickriver.com/photos/qmusaget/sets/72157623181919323/

Comments and critique are always welcome!
~

Click to expand...

--
http://davidnaylor.org/photography/
http://davidnaylor.org/blog/

Click to expand...

jpr2 said:

I had such freezing happen to mine 7d few times at the very
beginning - exactly the same symptoms and remedies; however,
it occurred to me that the culprit might be oxidized contacts - and
indeed after cleaning them on the camera side the effect disappeared
for good = not a single case for over 1.5 yrs. It well might be that
changing lenses often takes care of a little oxidization that may
happen in the meantime,

jpr2

Click to expand...

• every time we change a lens (or just turn it around in the mount) there is some very slight abrasive friction between successive contact blades of the lens and rods of the body mount;
• which is enough IMO to ensure that traces of eventual residue are removed each time;
• the problem might lay deeper, though, as each body contact comprises of three parts: a rod, a spring, and a base plate - all of them are electrodeposited with a layer of gold, but the nature of residue is not necessarily a pure oxidation;

Mayssam said:

jpr2 said:

I had such freezing happen to mine 7d few times at the very
beginning - exactly the same symptoms and remedies; however,
it occurred to me that the culprit might be oxidized contacts - and
indeed after cleaning them on the camera side the effect disappeared
for good = not a single case for over 1.5 yrs. It well might be that
changing lenses often takes care of a little oxidization that may
happen in the meantime,

Click to expand...

Click to expand...

David Naylor said:

For the record, this hasn't happened since I removed the battery grip. Will get back here when I know more.

--
http://davidnaylor.org/photography/
http://davidnaylor.org/blog/

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Bajerunner said:

Just wondering, should the camera be switched off for chaning lenses? The electronics have registered contact with the lens, thus have a live connection for for focusing and metering, and disconnecting while on means that one has broken the connection, thus confusing the camera.

If one does this with a computer e.g. remove a disk or such while trying to read, one gets an error.

Not the same thing?

This seems like the cases where the after market lens electronics do not get read and the camera gives an error.

Just a thought.
--
.....Just from an amateur......

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David Naylor said:

Just thought I'd update with a few new observations:

1. This happens (the camera locks/dies/freezes) when I switch lenses. Not sure why I didn't notice this as being the cause before.

2. It happens both with and without the grip mounted.

--
http://davidnaylor.org/photography/
http://davidnaylor.org/blog/

Click to expand...

David Naylor said:

Just thought I'd update with a few new observations:

1. This happens (the camera locks/dies/freezes) when I switch lenses. Not sure why I didn't notice this as being the cause before.

2. It happens both with and without the grip mounted.

--
http://davidnaylor.org/photography/
http://davidnaylor.org/blog/

Click to expand...