Time lapse photos 'jittery', camera or lens issue?

Interested in Time Lapse. Here is my first attempt, and I just want to know if the problem is related to MagicLantern, or the lens, or the camera or something else entirely.

Canon 70D, Tamron 24-70, manual focus, stabilization off. Tripod mounted, most all settings set to manual. Using MagicLantern, intervalometer set to 3 sec.

https://flic.kr/p/zvsz​Q5

In alternate frames, the camera seems to jump up and down, just a little. Every other frame, all odd numbered frames seem to be recorded at a few pixels higher than the even numbered frames. The camera is mounted to tripod, and very steady. Seems like some sort of software adjustment happening with the capture? The video goes very quickly, so it is hard to see. I made a PDF with 10 sequential frames, but I don't know how to share a PDF file.

Here is a second export using only the odd numbered frames. Rock solid steady. Weird.

https://flic.kr/p/zvwt​i9

Anyway, I don't think it is MagicLantern, but thought I would ask here first, see if I just missed something stupid.

Thank you, love this software!
Michael

Heya,

It's definitely software if you have it on Manual Focus and the IS/VC/OS is off. The jump is incremental on even frames. It's probably a bug with Magic Lantern. I would try again with an actual intervalometer instead of Magic Lantern and see what happens. The other thing is it may be whatever you used to compile the time lapse itself. Maybe try to use a different software to compile the video.

Very best,

Thanks. Its not the compiler because I can view the photos sequentially as jpgs in LR using the arrow keys and I can see the jumping. So it is done when recording.

So perhaps it is ML. Will investigate further.

Thank you,
Michael

Can you post a few frames to the original images you're working with, and give a detailed description of your work flow?

Also for sanity's sake, was this issue seen in multiple series of photos recorded at multiple times? Maybe try recording another series of photos at a different speed in a different location if you haven't already, just to rule out a super fluky issue of recording in sync with some random vibration. (But it does look like a neat software glitch.)

Have you looked and posted in the ML forums? Might get better or at least more responses, especially since the title of your thread does not reference ML

I have posted in ML, but was hoping someone had already encountered this here not using ML and could guide me.

I got the same results with 4 test runs, learning how to do the time lapse. Same lens, but moving locations.

Turns out that I think it was an intermittent contact in the Tamron IS (VC) switch. I cycled the switch a few times and was able to produce a series of photos with no jitter. One of the downsides of buying reverse engineered hardware.

But all seems well now, thanks to all that replied.

Michael