Skew on CCD light streak at DVinfo.net

Ryan Mast · May 11th, 2010, 02:29 PM

This is on a whip pan left, shot on my GY-HM700. The rest of the image isn't skewing (like you'd get with a CMOS sensor) -- just the light streaks. I never noticed this before -- why is this happening?

Zulqar Cheema · May 12th, 2010, 07:13 AM

If it is on prgressive then then it might give that impression, as it is a whip pan, perhaps?

Zulqar Cheema · May 16th, 2010, 04:55 PM

Sorry I meant Interlaced

Ryan Mast · May 17th, 2010, 08:36 AM

Nope, shot 1280x720, progressive, 30 fps.

Bob Richardson · May 17th, 2010, 01:12 PM

Is it possible that you have a filter on the lens (polarizer or UV) which has a light grain to it and, when exposed to high-contrast, bright lights, exhibits it's own flare up? You might not be seeing CCD streak there at all, in other words.

Ryan Mast · May 18th, 2010, 07:32 AM

That could make sense... But then why is the light streak skewing, when the rest of the image isn't? When the camera is still, the streak is straight vertically.

Bob Richardson · May 18th, 2010, 01:49 PM

Hmmm, that's a good question... is it possible for you to upload a short clip (preferably original .MOV from the SD card) so we can take a closer look at the problem, frame-by-frame?

May 11th, 2010, 02:29 PM	#1
Ryan Mast Regular Crew Join Date: Apr 2010 Location: Philadelphia, PA Posts: 28	Skew on CCD light streak This is on a whip pan left, shot on my GY-HM700. The rest of the image isn't skewing (like you'd get with a CMOS sensor) -- just the light streaks. I never noticed this before -- why is this happening?

May 17th, 2010, 08:36 AM	#4
Ryan Mast Regular Crew Join Date: Apr 2010 Location: Philadelphia, PA Posts: 28	Nope, shot 1280x720, progressive, 30 fps. __________________ Meteor Tower Films We make music videos, design video for live theater, and build interesting contraptions.

May 18th, 2010, 07:32 AM	#6
Ryan Mast Regular Crew Join Date: Apr 2010 Location: Philadelphia, PA Posts: 28	That could make sense... But then why is the light streak skewing, when the rest of the image isn't? When the camera is still, the streak is straight vertically. __________________ Meteor Tower Films We make music videos, design video for live theater, and build interesting contraptions.

May 12th, 2010, 07:13 AM	#2
Zulqar Cheema Regular Crew Join Date: Dec 2009 Location: Eseex, UK Posts: 45	If it is on prgressive then then it might give that impression, as it is a whip pan, perhaps?

May 16th, 2010, 04:55 PM	#3
Zulqar Cheema Regular Crew Join Date: Dec 2009 Location: Eseex, UK Posts: 45	Sorry I meant Interlaced

May 17th, 2010, 01:12 PM	#5
Bob Richardson Regular Crew Join Date: Mar 2009 Location: Portland, OR Posts: 178	Is it possible that you have a filter on the lens (polarizer or UV) which has a light grain to it and, when exposed to high-contrast, bright lights, exhibits it's own flare up? You might not be seeing CCD streak there at all, in other words.

May 18th, 2010, 01:49 PM	#7
Bob Richardson Regular Crew Join Date: Mar 2009 Location: Portland, OR Posts: 178	Hmmm, that's a good question... is it possible for you to upload a short clip (preferably original .MOV from the SD card) so we can take a closer look at the problem, frame-by-frame?