• Panasonic Cameras

  Help! Getting intermittant changes in color temperature…

  Posted by Paul Richards on December 6, 2006 at 2:50 am

  Help! Working with a team who has just aquired two brand-new Varicams with Fujinon lenses.

  Did a shoot yesterday and video from BOTH cameras are showing intermittant boosts in blue channel streams (viewed later via Avid color-correction histograms — we did see the same behavior on our monitors during yesterday’s indoor shoot) and slight declines in the red channel info. Seems unbelievable that both cameras would begin showing this behavior at the same time!

  Both cameras have just returned from an outdoor shoot, and were used in cool, dry AZ desert weather last week.

  Any help is appreciated. Has anyone seen anything like this?

  Thanks, Pablo

  M Brown replied 19 years, 5 months ago 4 Members · 4 Replies
• 4 Replies

• 

  Chris Bell

  December 6, 2006 at 3:11 am

  While I have never used it, I believe the varicam has an auto white balance feature. Perhaps both cameras had this feature enabled. That could cause the color balance to shift.

  Just a stab in the dark.

  Chris Bell
• 

  Paul Richards

  December 6, 2006 at 4:26 pm

  Operator assures me that this would not have been possible, since it is a spring-loaded switch. Are you talking about a menu setting buried somewhere?

  Thanks, Pablo
• 

  Ray Palmer

  December 7, 2006 at 2:51 am

  Paul,
  Ray Palmer here. We have been shooting with our Varicam F model for a couple of years now and we are located in Phoenix.
  Give us a call and maybe we can share notes. Three of us have attened the Varicamp for the Varicam.
  Ray Palmer
  Salt River Project
  602-236-8224 office
  rrpalmer@srpent.com

  Ray Palmer, Engineer
  Salt River Project
  Phoenix, AZ
  602-236-8224 office
  There are three types of people in this world, those that can count and those that can’t.
• 

  M Brown

  December 13, 2006 at 2:40 am

  I think I’d check my lighting instruments. Did anyone notice with their eye a change in light or noise from the lighting heads?

  I’d check power sources and if you’re using HMI lighting I’d check the key lights to see if they are having some issues, also if the key lights were plugged into the same circuit.

  I’ve seen this happen in standard definition with flakey power and HMI’s. Usually if an HMI ballast isn’t getting good power they’ll shut down, or start making noise, but not always.

  In my experience with Panasonic HD cameras (I bought the first one they sold in the world, and have personally shot more than 1000 hours of HD footage with these cameras) I’ve never experienced anything like this. There was a small problem with their first 1080i camera with some light aberrations in bright exterior light if you had used the synchro scan shutter and were at a speed less than 1/60th and were shooting outside, but that problem was corrected as soon as or shortly after we pointed it out to them in ‘2000.

  Hope this helps…Mason

  Mason

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