Jump to content


Photo

Avoiding Strobe with narrow shutter on F3


  • Please log in to reply
2 replies to this topic

#1 marshall rose

marshall rose

    New

  • Basic Members
  • Pip
  • 4 posts
  • Cinematographer
  • New York

Posted 18 April 2012 - 03:18 PM

Im lighting tabletop with various jokers and litepanels. For some shots I need to shoot with my shutter at a 250th of a second or a 500th. When I use the lightpanels i don't get a strobbing effect (or at least a rolling bars effect) when shooting with narrow shutter. When I use the jokers I do. Sometimes I need to use the jokers depending on the situation. So anyway, whats the solution here? I've put the shutter in "angle" mode but i still can't find the exact right shutter speed to avoid the rolling bars effect. I know jokers need to be shot with shutters that are divisible by 3 or 4 cause the voltage frequency is 120, right? Anyone know a shutter angle i can use that gives me an exposure of about 250th and also one near a 500th that won't give me rolling bars when using HMIs?

thanks
  • 0

#2 Stephen Williams

Stephen Williams
  • Sustaining Members
  • 4708 posts
  • Cinematographer
  • Europe

Posted 18 April 2012 - 03:38 PM

Im lighting tabletop with various jokers and litepanels. For some shots I need to shoot with my shutter at a 250th of a second or a 500th. When I use the lightpanels i don't get a strobbing effect (or at least a rolling bars effect) when shooting with narrow shutter. When I use the jokers I do. Sometimes I need to use the jokers depending on the situation. So anyway, whats the solution here? I've put the shutter in "angle" mode but i still can't find the exact right shutter speed to avoid the rolling bars effect. I know jokers need to be shot with shutters that are divisible by 3 or 4 cause the voltage frequency is 120, right? Anyone know a shutter angle i can use that gives me an exposure of about 250th and also one near a 500th that won't give me rolling bars when using HMIs?

thanks


Exposures of 1/500 will be a problem with small tungsten lights (2k or less) & HMI's may well arc. Anything over 96 / 100 fps can be problematical & you need to test what exactly works in the exact situation.
  • 0

#3 marshall rose

marshall rose

    New

  • Basic Members
  • Pip
  • 4 posts
  • Cinematographer
  • New York

Posted 19 April 2012 - 08:24 AM

Exposures of 1/500 will be a problem with small tungsten lights (2k or less) & HMI's may well arc. Anything over 96 / 100 fps can be problematical & you need to test what exactly works in the exact situation.


anyone else got an answer?
  • 0


Gamma Ray Digital Inc

CineLab

Rig Wheels Passport

Glidecam

Ritter Battery

Metropolis Post

Visual Products

Broadcast Solutions Inc

CineTape

Opal

Abel Cine

The Slider

Paralinx LLC

Technodolly

FJS International, LLC

Aerial Filmworks

Willys Widgets

Media Blackout - Custom Cables and AKS

Tai Audio

rebotnix Technologies

Wooden Camera

Visual Products

CineLab

Rig Wheels Passport

Gamma Ray Digital Inc

rebotnix Technologies

Glidecam

FJS International, LLC

Technodolly

Paralinx LLC

Broadcast Solutions Inc

Metropolis Post

Willys Widgets

Tai Audio

Media Blackout - Custom Cables and AKS

The Slider

Wooden Camera

Aerial Filmworks

Abel Cine

Opal

CineTape

Ritter Battery