jeffbake
lvl.3
Flight distance : 955587 ft
United States
Offline
|
ComPH Posted at 2017-5-23 16:04
The problem appears to be an interaction between the gimbal and the much faster phone OIS. The OIS only moves one gram or less, where the gimbal is moving hundreds of grams, so of course the OIS reacts much faster to the same motion and as they both try to fix the same problem, there is a momentary over correction, causing a glitch, until the OIS catches up the incorrect motion and goes back to new equilibrium. I am assuming that Apple or any other premium phone makers will not change the way they go about stabilization for the few of us liking the gimbals. After trying many gimbals and apps, I concluded that all is well, as long as you move the phone fairly smoothly, say with the "Ninja Walk". By far the best results I got were with the Steadicam Smoothie, which admittedly is clumsy and hard to use, but there is no servo loop delay issue because it is an open loop inertial system. I will try the Volt when it comes out late next month, but I don't expect any issues there either. BTW, my old Samsung Galaxy S3 works way better in this respect (no OIS), in comparison with the iPhone 7 and iPhone 7 Plus (and I suspect most of the OIS based phones). The FloMotion One upcoming gimbal claims the problem is the latency of the servo loop and that their upcoming gimbal will have much tighter servo loop, and therefore not have that problem, but given their schedule slips, the problem might be harder than anticipated.
You will never see me doing the Ninja walk - I would rather rent a Ronin first.
If true, this is interesting and would explain a lot of the jittering I get with some Osmo Mobile shots, even with an iPhone SE with the focus locked... |
|