Emergency dead pixel issue

Ed Moore · October 6th, 2006, 02:14 PM

Hi all,

Stuck on a big expensive shoot with an H1 that has developed a dead pixel stuck on white near the centre of the frame which is being recorded onto tape, played out down the HD-SDI and so on: ie. a big problem.

Cycling the power appears to make no difference.

Aside from getting a new camera body somehow, do I have any options on how to fix this?

Your help would be greatly appreciated!

Ed

Chris Hurd · October 6th, 2006, 02:17 PM

Ed your only recourse is to get it into Canon UK Service. Is rental an immediate option for you? Another option might be to mask the offending pixel in post. At least it doesn't move.

Nick Hiltgen · October 6th, 2006, 10:25 PM

Ed this may sound REALLY dumb but I know someone (don't look back in the beginning of the posts) who had a similar issue witha glowing white pixel right there in the frame.

There can be the slightest little bit of dust on the piece of glass in front of the sensor, double then triple check that that is REALLY clean, because that will look EXACTLY like a lit pixel. short of that you could always put the camera in a slightly warmer or cooler enviornment to see if it brings the pixel back. (but you probably shouldn't do that. Double check that piece of glass/plastic)

Ed Moore · October 7th, 2006, 01:10 AM

Thanks guys - the post option will definitely get me at least as far as the client not noticing, if I still will! And I'll get the CCD checked - there does seem to be a smudgey bit appearing behind the CCD block glass cover which I suspect is condensation as we're shooting in the middle of a very wet and cold forest in the early morning. Will triple check for dust; but this spot has appeared before in exactly the same spot so a bit suspicious...

There must be some sort of secret masking menu on the camera, shurely?

Cheers,

Ed

Chris Hurd · October 7th, 2006, 08:27 AM

Quote:

Originally Posted by Ed Moore

There must be some sort of secret masking menu on the camera, shurely?

In legend only. No human being has ever found it... a secret closely guarded by the service technician elves.

Doug Bennett · October 7th, 2006, 11:32 AM

fixing in post (at least in FCP in SD) is real simple. I've noticed some hot pixels only show up at higher gain settings. Maybe try turning gain down to -3?

October 6th, 2006, 02:14 PM	#1
Ed Moore Regular Crew Join Date: May 2006 Location: Birmingham, UK Posts: 35	Emergency dead pixel issue - please help! Hi all, Stuck on a big expensive shoot with an H1 that has developed a dead pixel stuck on white near the centre of the frame which is being recorded onto tape, played out down the HD-SDI and so on: ie. a big problem. Cycling the power appears to make no difference. Aside from getting a new camera body somehow, do I have any options on how to fix this? Your help would be greatly appreciated! Ed __________________ - Ed Moore DP

October 6th, 2006, 02:17 PM	#2
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,366 Images: 513	Ed your only recourse is to get it into Canon UK Service. Is rental an immediate option for you? Another option might be to mask the offending pixel in post. At least it doesn't move. __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!

October 6th, 2006, 10:25 PM	#3
Nick Hiltgen Trustee Join Date: May 2003 Location: Atlanta GA Posts: 1,427	Ed this may sound REALLY dumb but I know someone (don't look back in the beginning of the posts) who had a similar issue witha glowing white pixel right there in the frame. There can be the slightest little bit of dust on the piece of glass in front of the sensor, double then triple check that that is REALLY clean, because that will look EXACTLY like a lit pixel. short of that you could always put the camera in a slightly warmer or cooler enviornment to see if it brings the pixel back. (but you probably shouldn't do that. Double check that piece of glass/plastic) __________________ I have a dream that one day canon will release a 35mm ef to xl adapter and I'll have iris control and a 35mm dof of all my ef lenses, and it will be awesome...

October 7th, 2006, 01:10 AM	#4
Ed Moore Regular Crew Join Date: May 2006 Location: Birmingham, UK Posts: 35	Thanks guys - the post option will definitely get me at least as far as the client not noticing, if I still will! And I'll get the CCD checked - there does seem to be a smudgey bit appearing behind the CCD block glass cover which I suspect is condensation as we're shooting in the middle of a very wet and cold forest in the early morning. Will triple check for dust; but this spot has appeared before in exactly the same spot so a bit suspicious... There must be some sort of secret masking menu on the camera, shurely? Cheers, Ed __________________ - Ed Moore DP

October 7th, 2006, 11:32 AM	#6
Doug Bennett Major Player Join Date: Oct 2004 Location: NYC Posts: 260	fixing in post (at least in FCP in SD) is real simple. I've noticed some hot pixels only show up at higher gain settings. Maybe try turning gain down to -3?