Jump to content


Photo

Pulsating grain from one roll of 500T Vision 3

Pulsating blue grain

  • Please log in to reply
3 replies to this topic

#1 Kip Kubin

Kip Kubin
  • Basic Members
  • PipPipPip
  • 131 posts
  • Director

Posted 06 September 2016 - 04:48 PM

Here's the situation.

 

All stock bought from Kodak directly.

 

 

Shot a music video with an Arri SR2 with new stock from Kodak - No problems

 

 

Shot 2 additional mags of short ends on an Aaton XTR  - Stock about 2 years old - Refrigerated 

 

One short end - 50 ft - No problem other than a slightly higher amount of grain than the Arri Rolls

 

The other has an issue - the grain pulsates - it's constant in its pulsing or and the grain is substantially more blue in the shadows than the previous roll.

 

By pulsating I mean it comes and goes at consistent fast intervals - its there - it fades out - it's there again

 

Can't post a clip as its for a major label and the material is unreleased.

 

Has anyone seen this before?  Im just trying to avoid it in the future.  Im assuming its the age of the stock - and possible mishandling but could it also be camera related?

 

Thanks


  • 0

#2 David Mullen ASC

David Mullen ASC
  • Sustaining Members
  • 19963 posts
  • Cinematographer
  • Los Angeles

Posted 06 September 2016 - 05:44 PM

Could be x-ray damage...


  • 0

#3 Tyler Purcell

Tyler Purcell
  • Sustaining Members
  • 3947 posts
  • Other
  • Los Angeles

Posted 07 September 2016 - 01:43 AM

Do the pulses speed up or slow down based on where you are in the reel, or is it identical from start of reel to end?
  • 0

#4 aapo lettinen

aapo lettinen
  • Basic Members
  • PipPipPipPip
  • 1083 posts
  • Other
  • Finland

Posted 07 September 2016 - 03:35 PM

if it's intensifying/fading every turn of the roll then it might be temperature damage or pressure sensitization. if a roll is stored for example in the fridge in a way that one side of the roll is much warmer than then other and it's like that for long time then it may do this kind of damage: other side of the roll ages faster than the other. I have had this kind of problem in some eBay rolls but otherwise not that common. I rarely store rolls for more than two years after purchase though so if yours was very old it is easier for it to generate this kind of problem. 

X-ray damage is normally faster pulsing which may "sweep" across the image as far as I have seen


  • 0


Broadcast Solutions Inc

Metropolis Post

Ritter Battery

Gamma Ray Digital Inc

Visual Products

The Slider

FJS International, LLC

CineTape

Abel Cine

Wooden Camera

CineLab

rebotnix Technologies

Rig Wheels Passport

Paralinx LLC

Media Blackout - Custom Cables and AKS

Willys Widgets

Technodolly

Tai Audio

Glidecam

Aerial Filmworks

CineLab

Rig Wheels Passport

Gamma Ray Digital Inc

Ritter Battery

Technodolly

Media Blackout - Custom Cables and AKS

CineTape

Visual Products

Metropolis Post

FJS International, LLC

Abel Cine

Aerial Filmworks

Willys Widgets

Broadcast Solutions Inc

rebotnix Technologies

Wooden Camera

Glidecam

Paralinx LLC

The Slider

Tai Audio