5D/MII - Intervalometer "double shoots" in between sets

Issue #2322 new
Mike M created an issue

Sorry for the confusing title, not sure how to describe it better. Basically, for example, let's say I set an HDR sequence of 2 shots to be taken every 12 seconds. And let's just for this example say each exposure is about 1 second give or take.

What should happen based on my settings (and 99% of the time it works perfect) is this.

Second 1: (HDR Shot A) Shutter Open/Close - Exposure Writes to card Second 2: (HDR Shot B) Shutter Open/Close - Exposure Writes to card Second 3: Second 4: Second 5: Second 6: Second 7: Second 8: Second 9: Second 10: Second 11: Second 12: Second 13: (HDR Shot A) Shutter Open/Close - Exposure Writes to card Second 14: (HDR Shot B) Shutter Open/Close - Exposure Writes to card

The "bug" that's occurring is this:

Second 1: (HDR Shot A) Shutter Open/Close - Exposure Writes to card Second 2: (HDR Shot B) Shutter Open/Close - Exposure Writes to card Second 3: Second 4:(???) Shutter Open/Close - Exposure Doesn't Write to card Second 5:(???) Shutter Open/Close - Exposure Doesn't Write to card Second 6: Second 7: Second 8: Second 9: Second 10: Second 11: Second 12: Second 13: (HDR Shot A) Shutter Open/Close - Exposure Writes to card Second 14: (HDR Shot B) Shutter Open/Close - Exposure Writes to card


So the strange part is, every 12 seconds, a new HDR sequence should begin and like I said 99% of the time that is exactly what happens.

P.S. Many different settings, 10 second interval, 15 second interval, 3 shot HDR, 2 shot HDR, doesn't matter the error happens.

What's actually happening once in a while, and I'll be sitting there and notice it and GULP and be worried it's messing up my time lapse is almost immediately after the first sequence is taken, another 3 shots are taken. But what's weird is that later on upon review, the "DOUBLE TAKE" error/bug shots that shouldn't have been taken in the first place are in fact not on the card and are not exposed? So, yes this is a bug, no it's not messing up my time lapses (that I'm aware of), but, it is causing the mirror/shutter to take 2,3, however many actuations when it shouldn't be. I have video of this https://www.youtube.com/watch?v=F3llIwcqUFY it happens twice in 3 minutes, it was really really acting up the other day.

Let me ask, could it be that I did not format the card (in camera) before use? I notice that no matter what settings both exposure settings and intervalometer settings, this error occurs. I'm on a Canon 5d/Mark 2.

Apologies if this has already been addressed in other bug reports.

-Mike

Comments (2)

  1. Alex

    If the "double take" shots are not saved on the card, it might be caused by shutter wear (nothing to do with ML, and probably not even happening on the ARM processor, where ML is running).

    I couldn't follow the video to tell for sure if it's this (too much wind noise and camera shake), but my old 550D does make double shutter noises (but most of the time it gets err20).

    I'll try to reproduce though.

  2. Mike M reporter

    Thanks for the quick reply. Yuo could definitely be correct. But I have no idea. I will say though that it doesn't seem like a mechanical error or even a shutter problem spurred on by either mechanical or electronic issues, e.g., the mainboard being damaged (although I won't rule that out).

    If I'm the only one experiencing these problems then, sure, I'll concede it could be my body fizzing out on me.

    To describe the video a little more, and why it seems like ML or the processor (or both) causing the problem is, the exact same shots with the exact same settings, it could be bracket +2 or bracket +0.5, or whatever combination (this has been happening for months), no matter what, it's as if during a 15 second interval, there's shot 1 at 0 seconds, shot 2 at 15 seconds, error shot at 18 seconds, shot 3 at 30 seconds, etc...

  3. Log in to comment