Lumix S1H flickering when shooting VFR above 120fps...

tokun1

tokun1

Well-known member
Hello group.

I tried shooting my Lumix S1H at 180fps vfr (180 degre shutter speed) and I get nothing but light flickering, same at the other vfr settings down to 120, then I was fine. I'm blasting the subject with a Godox SL200w at 100% super bright and bouncing the light back with a white board. Perhaps you can't ever go above 120fps?

Any suggestions would be much appreciated!

Thank you!
 
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Lights flicker at high-speeds...the only answer really is to try different lights and shutter speeds @180fps.

[Some lights promise no flickering up to certain framerates.]
 
You'll even see (lower wattage) real tungsten lights flicker above 120. It surprised me the first time I saw it, too.

It used to be a lot more straightforward with just tungsten and HMI's(although those could flicker, too). There were charts and apps that told you the specific shutter speed/angle to use with which frame rates, depending on the power freq.(50Hz or 60Hz), to avoid flicker. But LED's, especially lower-end and "non-TV/Movie" fixtures threw a real monkey wrench in the works. I've been on shoots where some cameras had to shoot at a different shutter or clear-scan frequencies to avoid LED flicker, despite shooting the same frame rate.

What is your shutter speed? Conventional wisdom would say if you're in an area with 60Hz power(like here in the US), then you'd shoot with a shutter speed that is a multiple of/divisible by 60. But who really knows what the frequency of the modulation of that light is. Does Godox state anything about it's compatibility with high-frame rates? So, as NorBro suggested, you may just have to experiment and hope you find a combination that works. But it's possible that you may not.
 
Sorry, I forgot to mention the shutter speed, I shoot shutter angle so it is set at 180 degree, then adjusted it up and down but with no luck. I figured using syncro scan would not make a difference. Good advice I will check with Godox to see what I can find out. Thanks for the reply!
 
"Syncro Scan", sounds like it's probably the same as "Clear Scan", which is an electronic shutter like you normally have, but allows for MUCH finer adjustments and was designed for and mainly used for syncing with the scan rate of computer monitors and other display devices. This used to be really necessary to shoot CRT computer monitors, back in the day.

I'd give the the Syncro Scan a shot(can't hurt, anyway). I've had to use it on my C300 before to eliminate LED flicker when shooting 24P(23.98). And in a TV studio, no less... This was actually a multi-cam shoot, maybe four or five cameras, and almost every camera had to use a different scan rate to knock the flicker out.
 
Try flicker free from digital anarchy to alleviate anything you can’t get right in camera. It’s almost a must these days with LED lights at various venues if you wish to shoot slow motion, because even if I get the shutter angle right on one light, if there’s mixed lighting something somewhere else is left flickering.
 
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