Jump to content


Photo

ND problem with DVX100


  • Please log in to reply
5 replies to this topic

#1 Marcel Zyskind

Marcel Zyskind
  • Basic Members
  • PipPipPip
  • 135 posts
  • Cinematographer
  • Cph

Posted 19 May 2005 - 05:50 PM

Hi

I have raised this problem before, but I'll try again, maybe someone got the answer now that this camera has been used for some time.

I like to use nd's in front of the lens, but I've had this problem with the colors going off, the blacks going dark red or purple when using heavy nd's in front of the lens. It is not correctable in telecine. I have also seen this on the xl1 some time ago. I have never seen it on the pd150 though. I have been using tiffen filters.

Someone suggested that I should try Schneider filters, but I have not have had time to test them yet. I have also heard of mirrored nd's, but have not had the chance to try these either.

I would like to source this problem, since I start production on a film soon, where we will be shooting in harsh sunlight and I would like to use nd's in front of the lens.

Many thanks
Marcel
  • 0

#2 David Mullen ASC

David Mullen ASC
  • Sustaining Members
  • 19759 posts
  • Cinematographer
  • Los Angeles

Posted 19 May 2005 - 06:42 PM

I've never had that problem so I can't help you. You shouldn't have problems using ND.30 to ND1.2 filters, even if they don't use "water white" (or is that "white water"?) glass. Any heavier, or stacking them, you may start to have problem.
  • 0

#3 drew_town

drew_town
  • Sustaining Members
  • 383 posts
  • Camera Operator
  • Southeast US

Posted 19 May 2005 - 10:01 PM

I've never had that problem either. I've shot with a wide range of Tiffen ND's (from slight to heavy and stacked) with many different XL1s's, XL2's, PD-150's, and 170's. I can't think of what would cause that either. I've never used a DVX100 personally but know a handful people who have. They all use Tiffen filters, too. Might be an issue with the camera, something Panasonic or Tiffen needs to address. Does the camera work well otherwise?
  • 0

#4 J. Lamar King

J. Lamar King
  • Basic Members
  • PipPipPipPip
  • 764 posts
  • Gaffer
  • Los Angeles

Posted 19 May 2005 - 10:19 PM

I've ran into that problem and with Schnieder ND's. In my case it turned out the filters did have a magenta cast to them. If I white balanced, then pulled them guess what? A green cast to the picture. The DVX-100 did seem to be extra sensitive to that color shift and I don't quite know why.
  • 0

#5 Marcel Zyskind

Marcel Zyskind
  • Basic Members
  • PipPipPip
  • 135 posts
  • Cinematographer
  • Cph

Posted 20 May 2005 - 10:37 AM

Hi

Thanks for your replies!

I've had a look at these water white nd's next to regular nd's and on the grads you can really see a difference in the glass, the water whites are much "cleaner" and the regulars have a slight green tone to them...

Maybe that's where the problem lies.

All the best
Marcel
  • 0

#6 David Mullen ASC

David Mullen ASC
  • Sustaining Members
  • 19759 posts
  • Cinematographer
  • Los Angeles

Posted 20 May 2005 - 10:40 AM

The "green" problem is exaggerated and would barely be noticeable if at all.
  • 0


FJS International, LLC

Glidecam

Abel Cine

CineTape

Wooden Camera

CineLab

Broadcast Solutions Inc

Tai Audio

Rig Wheels Passport

Gamma Ray Digital Inc

The Slider

Media Blackout - Custom Cables and AKS

Opal

Visual Products

rebotnix Technologies

Aerial Filmworks

Technodolly

Paralinx LLC

Ritter Battery

Willys Widgets

Metropolis Post

The Slider

Visual Products

Technodolly

Aerial Filmworks

Metropolis Post

Ritter Battery

Rig Wheels Passport

Media Blackout - Custom Cables and AKS

FJS International, LLC

Tai Audio

Willys Widgets

Glidecam

Wooden Camera

Abel Cine

Opal

Paralinx LLC

CineLab

CineTape

Gamma Ray Digital Inc

rebotnix Technologies

Broadcast Solutions Inc