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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Is it our Scarlet or Epic switchable to 50Mhz and 60Mhz ?

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SUNILPREM

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Is it our Scarlet or Epic switchable to 50Mhz and 60Mhz ?I have looked all menu set up in Scarlet couldn't find out.if don't have, eagerly we need this feature in our camera,then only we can work easily in all kind of lighting condition .
Thank you guys
 
Just recently I shoot in Asian region ,my frame rate was 60fps,in 24p time base,so my shutter was 1/120 but can't shoot at 1/120 shutter speed in available lighting condition ,very badly flickering ,so I have to change my shutter speed at 1/100, if I have 50mhz set up on menu I can easily work around this kind of situation.
Thank you
 
Try shooting with a 25p timebase with a 50fps frame rate, then your shutter would be 1/100th for 180degrees. You shouldn't get flickering.
 
Thank you Matt Ryan,but unfortunately my client want to be shoot in 24p timebase.
 
ah, well thats the problem then. When your in a PAL country shooting NTSC frame rates you going to get into those power issues with flickering. Same thing if you shoot in the US with PAL frame rates. Unfortunately, that is the way it is. You will just have to regulate your shutter speed to reduce the flickering as there isn't any other solutions other than shooting in that Regions Mode (PAL or NTSC). It's the way the electrical currents are running.
 
Ya,that is the problem,here in India all feature film for theater release shoot with 24p in Scarlet and epic cameras,If RED guys implement this feature in new firmware we can easily work this out,I wish they will add this in near future.
Thank you
 
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I don't see the problem. You can shoot at 1/50 or 1/100 or whatever multiple of 50 shutter without flickering. A "50 Hz mode" would just force the electronic shutter to those speeds.
 
I don't see the problem. You can shoot at 1/50 or 1/100 or whatever multiple of 50 shutter without flickering. A "50 Hz mode" would just force the electronic shutter to those speeds.
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If your project rate is 24p, then the shutter opening will not be in sync with the power line, irregardless of the shutter degrees.
 
We shot a commercial a few days ago in NYC for Russian TV. 25 FPS timebase, 172.8 degree shutter in tungsten light to avoid flicker.
 
There will still be pulsing in the lighting regardless of your shutter speed. It may be less noticeable but it is there. I had to shoot for the BBC here in the US at 25fps and there was pulsing/flickering at every shutter speed. At 172.8 degree shutter speed I got the best results but if you zoom into the image that has lights you can see the faint pulsing.
 
Randall Weatherington said:
If your project rate is 24p, then the shutter opening will not be in sync with the power line, irregardless of the shutter degrees.
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Eh? I don't get you. Can you explain? Is this a RED specific issue? I shoot all over the world and simply choose the appropriate shutter speed to capture a full power cycle no matter what the frame rate I'm using or if it's a 60Hz country or a 50Hz country. Sometimes flicker is a challenge, on Navy ships for example which often have both 50Hz and 60Hz running side by side, the electrical current in Japan is a another PITA, fluorescents and LEDs can be troublesome, but usually I can eliminate flicker with a swift shutter adjustment.
 
Liam Hall said:
Eh? I don't get you. Can you explain? Is this a RED specific issue? I shoot all over the world and simply choose the appropriate shutter speed to capture a full power cycle no matter what the frame rate I'm using or if it's a 60Hz country or a 50Hz country. Sometimes flicker is a challenge, on Navy ships for example which often have both 50Hz and 60Hz running side by side, the electrical current in Japan is a another PITA, fluorescents and LEDs can be troublesome, but usually I can eliminate flicker with a swift shutter adjustment.
Click to expand...
Yes we can avoid the flicker ,but we have to change the shutter speed.if we are in 180degree shutter angle we have to maintain our shutter speed is double of the frame rate.that means if we shoot in 24fps we have to put our shutter is 1/48 per second.if we shoot in 60fps we have to keep our shutter speed at 1/120.so some time flicker come out we can't maintain this 180 degree shutter angle rule.
Thank you
 
Liam Hall said:
Eh? I don't get you. Can you explain? Is this a RED specific issue? I shoot all over the world and simply choose the appropriate shutter speed to capture a full power cycle no matter what the frame rate I'm using or if it's a 60Hz country or a 50Hz country. Sometimes flicker is a challenge, on Navy ships for example which often have both 50Hz and 60Hz running side by side, the electrical current in Japan is a another PITA, fluorescents and LEDs can be troublesome, but usually I can eliminate flicker with a swift shutter adjustment.
Click to expand...
This has been my experience as well. The only times I've had problems is when there are LEDs or fluorescents that don't flicker at the same rate as everything else.

SUNILPREM said:
Yes we can avoid the flicker ,but we have to change the shutter speed.if we are in 180degree shutter angle we have to maintain our shutter speed is double of the frame rate.that means if we shoot in 24fps we have to put our shutter is 1/48 per second.if we shoot in 60fps we have to keep our shutter speed at 1/120.so some time flicker come out we can't maintain this 180 degree shutter angle rule.
Thank you
Click to expand...
I don't see how it would be possible to have 180 degree shutter at 24/60fps while syncing to 50Hz lights. Admittedly I'm no expert, but my understanding is that the only way to sync is by changing the electronic shutter speed and when you change that you're no longer shooting at 180 degree shutter.
 
SUNILPREM said:
Yes we can avoid the flicker ,but we have to change the shutter speed.if we are in 180degree shutter angle we have to maintain our shutter speed is double of the frame rate.that means if we shoot in 24fps we have to put our shutter is 1/48 per second.if we shoot in 60fps we have to keep our shutter speed at 1/120.so some time flicker come out we can't maintain this 180 degree shutter angle rule.
Thank you
Click to expand...

There is no rule that states you have to maintain a 180 degree shutter angle. I often use faster shutter speeds - on aerials and super-wides to add sharpness or to give "punch" to an action shot and longer when I need more stop or to avoid flicker. Yes, a 180 degree shutter works most of the time for "film look" at standard fps, but I often think people adhere to it simply because they have been told that is how you create a film look by so many bloggers and internet filmmakers.
 
good point. I just shot a spot where we used 1/96 shutter to make it a little more punchy.

Liam Hall said:
There is no rule that states you have to maintain a 180 degree shutter angle. I often use faster shutter speeds - on aerials and super-wides to add sharpness or to give "punch" to an action shot and longer when I need more stop or to avoid flicker. Yes, a 180 degree shutter works most of the time for "film look" at standard fps, but I often think people adhere to it simply because they have been told that is how you create a film look by so many bloggers and internet filmmakers.
Click to expand...
 
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