[Frameworks] Timelapse and camera shutter/mirror jam

[Andrew Connor]

Hi,.

Just wondered if anyone else has been doing timelapse sequences - I've 
started using them in my animations, but have just hit a bit of a problem.

I'm using a Canon 450D (equivalent to a Rebel XSi in the US), using 
manual settings for f-stop, ISO and shutter speeds (1/15)  to fit the 
light conditions, and triggering with an intervalometer at 1 second or 2 
second intervals. I usually need quite long sequences for my work, so 
it's not unusual for me to take up to 4,500 shots in one sequence.

For some reason, the camera jams after between 5 and 40 shots, 
displaying an Err. 99 message (a generic error - it just advises you to 
turn the camera off and on again!), but when I've done this with the 
lens off I can see that the mirror is sticking about halfway up as it 
lifts to expose the sensor and shutter mechanism.

Has anyone else had this problem? Is there an easy (and cheap) way to 
fix it, or is it just the result of wear and tear by taking lots of 
shots in long continuous sequences?

Thanks,

Andy

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