Originally Posted by tomtastic
Edit: I checked the second test clips I did with the IR remote (4 clips total). This time, the first pair, again the start sync was off 6/100th's of a second. After that the next 3 clips were perfectly in sync matching up on the exact 100th's place on my phone, not every other clip like before. I'm not going to spend any more time worrying about it right now, it's good to know it's that precise with the remote, but I really want the sync cable.
Originally Posted by tomtastic in how to sync thread
The reason I went with this particular model was they included an IR remote which I thought would get perfect sync, but the design specs vary so much on action cams, especially when they're cheap knockoffs. Fortunately my 4k camcorders line up in sync perfectly with the included remote. I attempted a sync cable but it didn't work because they use a proprietary micro USB port instead of a 2.5 or 3.5mm port. But the remote works for start/stop and zoom sync.
Am very impressed with the Sony AX100s you're using, but confused about the sync accuracy you report when using a remote control.
At 30fps, there would be a new frame every 3.33 hundredths of a second, or 33.3mS. A discrepancy of 6/100th sec would be 60mS and around two frames out. Of course you'd simply move one of the clips on the editing timeline by 2 frames and you'd be left with a relatively small residual discrepancy.
In the other scenario you report, a match to the nearest 1/100th sec, that would indicate a timing mismatch no worse than 10mS. There'd be no need to movie the left or right clip by even one frame in the editor. However I have to ask what actual residual discrepancy is there? Have you been able to take some 3D shots of a demanding scene like a water fountain and obtain good results?
If the remote really can reliably give you a very low residual discrepancy, say 3mS or better, I'd be very interested. I think it would set a precedent. I don't think anyone else has obtained perfect or near perfect synch using an untethered remote control.
I'm not sure I'd be prepared to outlay what it would currently cost to acquire two AX100s but I'd be prepared to purchase two cheaper cameras if tests indicated they could be started up to within 3mS using a single remote control. If two AX100s can synch to within 3mS of each other with a single untethered remote, perhaps some other models can too!
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I often think about how useful a 3D rig could be to send a side by side or top and bottom stereo image to a single 4K 2D camera, but I'm not prepared to try to build one, and off the shelf 3D rigs I've seen advertised are quite expensive.
The KÚLA (Bebe and Deeper) conversion lenses which could be interesting to experiment with have been advertised as being available on pre-order
for a very long time. The Loreo 3D lens in a cap appears to be a mature product. However I'd be more inclined to order a Kula or Loreo 3D lens if there were positive reports from users.