Yep, indeed it does but when taking meteor shots one is taking sequences of hundreds of images. Unfortunately the manual says the mirror lock up works in what it calls “single shot” operation. It needs a two step operation to function and whilst that can be done with the canon remote control it can’t be done sequentially, automatically. Looks like it would need the observer to manually do the two press thing every shot. That would be VERY tedious after a short time let alone 6 hours!
I’ll just need to beef up the tripod and investigate further vibration mitigation for future field operations. IF the weather co-operates I’m going to run the same set up with the Quadrantids just to see how it behaves.
I am just so disappointed this could all be a mechanical resonance ;-))