Jump to content


Photo

Green Band HPX 500


  • Please log in to reply
7 replies to this topic

#1 Rob Featherstone

Rob Featherstone
  • Basic Members
  • PipPip
  • 55 posts
  • Cinematographer
  • New York

Posted 14 February 2010 - 10:11 AM

While On a recent shoot with a Panasonic hpx 500 we noticed a pale green band at the bottom of the frame.
It only appeared in 720 mode. When we switched to 1080i it disappeared.
it also moved as we changed frame rates.
At 48 fps it was the worst, widest.
At 32 fps it was smaller.
At 60 fps it was not present.

We detached all accessories and ran on battery, as well as "rebooted" the camera.

All to no avail.

Any ideas, thoughts? Thanks!
  • 0

#2 Satsuki Murashige

Satsuki Murashige
  • Sustaining Members
  • 3510 posts
  • Cinematographer
  • San Francisco, CA

Posted 15 February 2010 - 03:33 AM

Weird. What were you shooting? Were you under fluorescent practicals? Were you using a 180 shutter? The only thing I can think of right now is that it might be some kind of syncro scan issue, since you mention it went away at 60fps. I'd be curious to know if it was present at 30fps as well...
  • 0

#3 Jonathan Bowerbank

Jonathan Bowerbank
  • Basic Members
  • PipPipPipPip
  • 2815 posts
  • 1st Assistant Camera
  • San Francisco, CA

Posted 15 February 2010 - 03:59 AM

Was it just in the viewfinder or in all the monitors as well? Was it still there when you transferred the footage and reviewed it?

I've seen something similar to this before, and it turned out to be a bad connection with the camera to viewfinder. Had to rig the cable with a certain amount of tension against the body to remedy it before we got a replacement.
  • 0

#4 Rob Featherstone

Rob Featherstone
  • Basic Members
  • PipPip
  • 55 posts
  • Cinematographer
  • New York

Posted 15 February 2010 - 08:19 AM

We didn't try disconnecting the b&w finder, but we did disconnect the other monitors.

We had a Marshall on the camera and the 17" panasonic.

It wasn't an HMI or flouro kind of thing because it was a straight band right across the entire image.

It looked like the line you would get when shooting a crt on a film camera running at 29.97. Except fainter and wider.

I did think it was a shutter issue but changing the shutter didn't change it.

You know how it is when something goes wrong on a shoot! We probably weren't as scientific as possible.

When we found we could shoot at 60 fps and get a clean image we just went that route immediately.

I am guessing it's a processing or chip issue.
  • 0

#5 Jonathan Bowerbank

Jonathan Bowerbank
  • Basic Members
  • PipPipPipPip
  • 2815 posts
  • 1st Assistant Camera
  • San Francisco, CA

Posted 15 February 2010 - 10:41 PM

It was present when you reviewed the footage as well though?
  • 0

#6 Rob Featherstone

Rob Featherstone
  • Basic Members
  • PipPip
  • 55 posts
  • Cinematographer
  • New York

Posted 16 February 2010 - 10:19 PM

Yes it was there after we imported the footage.

I was hoping it was a monitor issue but I think it was a chip issue!
  • 0

#7 Rob Featherstone

Rob Featherstone
  • Basic Members
  • PipPip
  • 55 posts
  • Cinematographer
  • New York

Posted 17 February 2010 - 06:48 PM

Just heard from the producer.

Apparently it was a warranty fix on a known problem!

So still don't know what it was!

-Rob
  • 0

#8 Hengky Christ

Hengky Christ

    New

  • Basic Members
  • Pip
  • 7 posts
  • Director
  • Indonesia

Posted 20 September 2010 - 12:14 PM

Hii Rob.

I think the exact problem is on the camera software.
yes u must take your cam (especialy if still under warranty for repair )

it never happen before , but i report the problem to panasonic asia pacific , cause maybe happen to our camera too
thanks
  • 0


CineLab

Aerial Filmworks

Rig Wheels Passport

Abel Cine

Media Blackout - Custom Cables and AKS

CineTape

The Slider

Paralinx LLC

Visual Products

rebotnix Technologies

Broadcast Solutions Inc

Glidecam

Technodolly

Wooden Camera

Metropolis Post

Ritter Battery

Tai Audio

FJS International, LLC

New Pro Video - New and Used Equipment

Gamma Ray Digital Inc

Willys Widgets

rebotnix Technologies

FJS International, LLC

Media Blackout - Custom Cables and AKS

Metropolis Post

Technodolly

Gamma Ray Digital Inc

New Pro Video - New and Used Equipment

Rig Wheels Passport

Abel Cine

Visual Products

CineLab

Willys Widgets

CineTape

Aerial Filmworks

The Slider

Tai Audio

Ritter Battery

Wooden Camera

Broadcast Solutions Inc

Glidecam

Paralinx LLC