shutter question at DVinfo.net

Rickey Brillantes · March 4th, 2010, 11:00 PM

My Z7u when I put my shutter speed to 60, I see a slight banding brown color slowly moving up my screen, but when I crank my shutter to let say more than 170 or if I set it to auto mode the banding disappears. This only appears when Im shooting under florescent situation. Do I need to twick something in the settings to get rid of it? Thanks.

Adam Gold · March 5th, 2010, 01:22 AM

By default, FLCKR REDUCE (p. 70) should be on, but it doesn't always work. You've discovered the solution -- use a slower shutter speed. Or leave it in auto.

Lee Berger · March 6th, 2010, 05:26 AM

I've noticed this as well and I think it's possibly a bug in the camera that causes it not to sync with certain fluorescent fixtures even when the shutter speed is locked on 1/60. For me the fix has been to switch to auto shutter and back to fixed. The sync problem does not happen every time under fluorescent and therefore requires careful attention to the possibility it may occur.

Rickey Brillantes · March 6th, 2010, 12:31 PM

According to the manual pg 107, This occurs when recording pictures under a fluorescent lamp, sodium lamp, or mercury lamp. This is not a malfunction. This can be improved by changing the shutter speed (p. 31).

But the thing is that I notice it after an hour of shooting and what really sucks is that i cannot use the footage. oh my, oh my! Luckily it's not a paying gig. It's just my son doing his science project presentation at school.

Uli Mors · March 9th, 2010, 05:44 PM

You are encountering CMOS line by line readout.

50hz FLUO vs 50Hz (~) that dont match 100%

in 1/60 (or higher) the fluorescent does not fill your screen 100% each time and because 50hz dont match the "shadow" part of the image slowly crawls...

uli

March 4th, 2010, 11:00 PM	#1
Rickey Brillantes Major Player Join Date: Jun 2005 Location: Ontario, California Posts: 309	shutter question My Z7u when I put my shutter speed to 60, I see a slight banding brown color slowly moving up my screen, but when I crank my shutter to let say more than 170 or if I set it to auto mode the banding disappears. This only appears when Im shooting under florescent situation. Do I need to twick something in the settings to get rid of it? Thanks. Last edited by Rickey Brillantes; March 4th, 2010 at 11:44 PM.

March 5th, 2010, 01:22 AM	#2
Adam Gold Inner Circle Join Date: Jan 2007 Location: Woodinville, WA USA Posts: 3,467	By default, FLCKR REDUCE (p. 70) should be on, but it doesn't always work. You've discovered the solution -- use a slower shutter speed. Or leave it in auto. __________________ "It can only be attributable to human error... This sort of thing has cropped up before, and it has always been due to human error."

March 6th, 2010, 05:26 AM	#3
Lee Berger Major Player Join Date: Dec 2006 Location: Tallahassee, Florida Posts: 326	I've noticed this as well and I think it's possibly a bug in the camera that causes it not to sync with certain fluorescent fixtures even when the shutter speed is locked on 1/60. For me the fix has been to switch to auto shutter and back to fixed. The sync problem does not happen every time under fluorescent and therefore requires careful attention to the possibility it may occur. __________________ www.leebergermedia.com

March 6th, 2010, 12:31 PM	#4
Rickey Brillantes Major Player Join Date: Jun 2005 Location: Ontario, California Posts: 309	According to the manual pg 107, This occurs when recording pictures under a fluorescent lamp, sodium lamp, or mercury lamp. This is not a malfunction. This can be improved by changing the shutter speed (p. 31). But the thing is that I notice it after an hour of shooting and what really sucks is that i cannot use the footage. oh my, oh my! Luckily it's not a paying gig. It's just my son doing his science project presentation at school.

March 9th, 2010, 05:44 PM	#5
Uli Mors Major Player Join Date: May 2006 Location: Germany Posts: 565	You are encountering CMOS line by line readout. 50hz FLUO vs 50Hz (~) that dont match 100% in 1/60 (or higher) the fluorescent does not fill your screen 100% each time and because 50hz dont match the "shadow" part of the image slowly crawls... uli