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Esteemed Contributor
Posts: 3,849
Registered: ‎06-11-2013

Re: 5D Mark 3 Shutter Release or Self-Timer Mystery

That is bizarre.   You may want to call Canon support to inquire about that.  You've done a good job pin-pointing the issue.  The Sun does put out nearly as much energy in infrared as it does in visible... but I would have expected the camera sensor wanted to see a very specific sequence of IR pulses... not just IR wavelengths in general.

 

While I don't often enable the IR sensor ... I don't recall the sunlight being an issue on my 5D III.

Tim Campbell
5D III, 5D IV, 60Da
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Occasional Contributor
Posts: 21
Registered: ‎05-03-2014

Re: 5D Mark 3 Shutter Release or Self-Timer Mystery

I've never enabled the IR sensor!
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Esteemed Contributor
Posts: 3,849
Registered: ‎06-11-2013

Re: 5D Mark 3 Shutter Release or Self-Timer Mystery


@DesertAura wrote:
I've never enabled the IR sensor!

You mentioned that you use the 2 second delay mode.  That mode also enables the IR sensor.  Any of the "delay" modes enable the IR sensor.   If you look at either the 10-sec or 2-sec timer options they have a symbol of the IR remote next to them.

 

If you use the 2 sec. delay mode to allow the camera vibration to settle down when shooting with a tripod then this also enables the IR sensor.  If you use a "wired" remote shutter release you can use the instant mode (since using pressing the shutter button on a wired shutter release wont shake the camera.)

 

 

Tim Campbell
5D III, 5D IV, 60Da
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Occasional Contributor
Posts: 21
Registered: ‎05-03-2014

Re: 5D Mark 3 Shutter Release or Self-Timer Mystery

That explalins why the IR sensor would be enabled.  However, I have used a wired shutter release before and the camera shutter fired on its own using it, as well.  At the time, I thought the problem was the cable remote (which was brand new and Canon brand), but this problem with the 2-second timer and IR sensor would seem to indicate the two conditions are related.  I'm relatively certain I would not have been using the self-timer with the cable remote.  As you said, it wouldn't make sense.

 

Does using Live View have any connection with the IR sensor?  Chances are fairly good that I switched to Live View in all circumstances before tripping the shutter, whether using the cable remote or the self-timer.

 

In any event, this certainly can't be normal behavior.  I know I'm not the only 5D III owner who uses the 2-second timer on a tripod in the sun!

 

Bev

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