Color Shifting at High Shutter Speed at DVinfo.net
DV Info Net

Go Back   DV Info Net > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony HDV and DV Camera Systems > Sony HVR-Z1 / HDR-FX1

Sony HVR-Z1 / HDR-FX1
Pro and consumer versions of this Sony 3-CCD HDV camcorder.

Reply
 
Thread Tools Search this Thread
Old May 7th, 2008, 12:28 PM   #1
Major Player
 
Join Date: Jul 2005
Posts: 580
Color Shifting at High Shutter Speed

I was shooting at a 2000/sec and 3000/second shutter speed last week, and noticed an odd pulsing color shift. About every two-three seconds, the color balance would morph to a warmer look, hold for a few seconds, then slide back to normal.

This happened in a manual WB mode. I rebalanced, same issue. I went to autoWB, same issue. Took off shutter speed, problem goes away.

Any ideas why the high shutter rate triggered this, and how to fix it? This was indoors, by the way, with a mix of flourescent and daylight sources.
Bill Ward is offline   Reply With Quote
Old May 7th, 2008, 07:00 PM   #2
Inner Circle
 
Join Date: Jun 2003
Location: San Jose, CA
Posts: 2,222
Quote:
Originally Posted by Bill Ward View Post
Any ideas why the high shutter rate triggered this, and how to fix it? This was indoors, by the way, with a mix of flourescent and daylight sources.
I've seen this problem with my FX1, Z1U and now EX1. I don't have a great explanation for this other than the longer shutter speeds average out the color change over a fluorescent light's cycle. So, it's not just the shutter speed. A video camera isn't shooting a true 30p or 60i frames /second locked to the electrical supply frequency of 60 Hz. This means that the shorter shutter speeds are capturing a tiny time slice of the FL cycle, which isn't color balanced over the entire cycle. So, the solution is to use the pro, flicker free fluorescent lights or skip FLs altogether.

Another issue is to ensure that your white balance process uses at least 1/60 seconds of data. DSLRS can take an incorrect white balance this way. You just have to white balance with a shutter speed of 1/60 or slower. I'm not totally sure this is the case with any or all camcorders, but to be on the safe side, I do it anyway.
Gints Klimanis is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

B&H Photo Video
(866) 521-7381
New York, NY USA

Scan Computers Int. Ltd.
+44 0871-472-4747
Bolton, Lancashire UK


DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony HDV and DV Camera Systems > Sony HVR-Z1 / HDR-FX1

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



All times are GMT -6. The time now is 07:26 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2024 The Digital Video Information Network