Jump to content




Photo

Why is this shot strobing?


  • Please log in to reply
4 replies to this topic

#1 Nitai Lev Oren

Nitai Lev Oren
  • Basic Members
  • PipPip
  • 39 posts
  • Cinematographer
  • Israel

Posted 17 May 2016 - 07:24 AM

the other day I shot a corporate video

and here is a sample:

 

and I saw on the screen there is minimal strobing. (look at the guy shirt long enough)

shot on 60D f2.8 Shutter 50 24FPS

there were 3 open face light in the scene.

the rule of thumb is: that the shutter suppose to be X2 of the frame rate right? but if I shot on 24FPS the shutter needs to be 48 and so I shot it on shutter 50

so I don't see what is the problem


Edited by Nitai Lev Oren, 17 May 2016 - 07:32 AM.

  • 0




#2 timHealy

timHealy
  • Basic Members
  • PipPipPipPip
  • 1232 posts
  • Other
  • New York

Posted 17 May 2016 - 09:12 AM

With video compression I see something but not sure what I am seeing. Could it be Moire pattern of the fabric?

 

Best

 

Tim


  • 0

#3 Nitai Lev Oren

Nitai Lev Oren
  • Basic Members
  • PipPip
  • 39 posts
  • Cinematographer
  • Israel

Posted 17 May 2016 - 09:24 AM

no it's not moire, I solved the problem it was small led light on the back I forgot it made it strobe.

but another question is how do I had to light them in order they will be separate from the background?


  • 0

#4 timHealy

timHealy
  • Basic Members
  • PipPipPipPip
  • 1232 posts
  • Other
  • New York

Posted 17 May 2016 - 09:40 AM

no it's not moire, I solved the problem it was small led light on the back I forgot it made it strobe.

but another question is how do I had to light them in order they will be separate from the background?

 

 

Backlight or Production design. See how the woman is separate from the background? Her dark hair against a lighter backdrop? Not so much for the background behind the guy.

 

Other wise use a light. In this case I would use something soft and wide to cover the two. A chimera, a half dome, a westcott. A 4 foot kino with diffusion and all with and egg crate. Something like that.

 

Best

 

Tim


  • 0

#5 Nitai Lev Oren

Nitai Lev Oren
  • Basic Members
  • PipPip
  • 39 posts
  • Cinematographer
  • Israel

Posted 17 May 2016 - 10:27 AM

and the front light is not bright what should I've done to brighten them a little more?

 

p.s: when do you use egg crates and why?


  • 0


Abel Cine

CineLab

Ritter Battery

Zylight

Broadcast Solutions Inc

Paralinx LLC

Willys Widgets

Rig Wheels Passport

Metropolis Post

Technodolly

Visual Products

Glidecam

rebotnix Technologies

Aerial Filmworks

CineTape

Pro 8mm

Tai Audio

The Slider

CineTape

Technodolly

Glidecam

CineLab

Metropolis Post

Visual Products

Tai Audio

Ritter Battery

Abel Cine

Aerial Filmworks

Zylight

Broadcast Solutions Inc

Paralinx LLC

Willys Widgets

Rig Wheels Passport

Pro 8mm

rebotnix Technologies

The Slider