why? having a little problem (with quicktime sample) at DVinfo.net

Andy Lunn · July 8th, 2007, 08:07 PM

Hello guys.

After using the xlh1 on two jobs recently, I have had the same problem accur on both jobs. Can somebody tell what this is and how i stop it?

http://media73.co.uk/why/forxlcinemaOnly.mov

The camera was in full manual mode, but the lens had the stabaliser switch on as i was going handheld. I have also had a lens flare problem when lighting was lower than the camera, whats the best way to solve this? when space is restricted? aka inside a vehicle? I did have a matt box fitted.

Any help on the above very appreciated as i cant work out what it is, new xl is only 2 weeks old.

cheers

ps. preset was panalook and these shots are not cc. heres a quick test footage clip for the client to view what we are doing.

http://www.media73.co.uk/MotorHouse/MotorHouse.html

Bill Pryor · July 8th, 2007, 08:16 PM

Looks like typical lens flare to me. Only way around that is to change your angle.

Andy Lunn · July 8th, 2007, 08:19 PM

So there is no other way? what if that IS THE best angle you need?

Cole McDonald · July 9th, 2007, 10:34 AM

turn the image stabilizer off. Those flares are much more obvious as they move when the prism does its thing to correct for the motion. Capture good footage in camera, then stabilize in post...practice holding very steady, which is more about relaxation than rigidity. Mount the camera on a tripod, that will help even more.

beautiful pictures, BTW.

Noa Put · July 10th, 2007, 10:07 AM

Maybe a stupid question but can't you just return it to the store were you bought it from? As I'm depending on my camera's bigtime every week I have contacts with a technician from Sony for quick repairs, also all my new cameras were allways bought at a local dealer were I could go to during the warranty period if something would be wrong.
I know this is not helping you much but I hope you will find a solution soon, these "dancing" reflections look like something I never seen before and are for sure not normal.

Chris Hurd · July 10th, 2007, 10:20 AM

Nothing wrong with that camera and I've seen that sort of thing before. The dancing reflection is a lens flare which is definitely caused by OIS and is due to the angle in which the light is hitting the lens. As has been pointed out already by the replies above, there are a couple of ways to eliminate this issue.

1. Turn off OIS. Find a way to hard-mount the camera (tripod, bean bag, etc.)

2. Flag the incoming light with a lens hood extension such as a piece of cardboard.

3. Change the angle of the shot.

Again -- there ain't nothing wrong with the camera. See above posts from Bill and Cole.

Noa Put · July 10th, 2007, 12:41 PM

That's very strange then, In almost 3 years time I never had this type of behaviour in my sony vx2100 and my panasonic dvx100b and I have filmed in comparable situations.

Cole McDonald · July 11th, 2007, 09:24 AM

different stabilizing systems?

Chris Hurd · July 11th, 2007, 07:12 PM

Yes there are different types of OIS... see http://www.dvinfo.net/conf/showpost....35&postcount=6

The Canon XL series lenses are the only ones using the VAP type as far as I know.

Noa Put · July 21st, 2007, 06:46 AM

Well, I couldn't believe it but I got yesterday the same problem, it occured when I was filming the dancingpart in the evening at a wedding, the DJ had these different colored spots and suddenly I saw 2 "dancing" bright blue dots in my viewfinder. They came from a very bright blue spot that was shining directly in my lens, even if I pointed a bit lower to the floor so I could'n see the spot anymore the bright dots were still there almost like thery were dancing to the music :D, only if turned away from the blue spot so it didn't shine in my lens the dots dissapeared. There were similar, but other colored spots used by the DJ but they didn't cause a problem.

Cole McDonald · July 21st, 2007, 12:50 PM

Interesting, I'm wondering if it's part of the coating on the prism perhaps that is reflecting just the blue wrong? Perhaps a light orange filtration + white balance would help take care of that.

Chris Hurd · July 21st, 2007, 08:46 PM

The "dancing lights" issue is a confirmed side-effect of the VAP-type O.I.S. in certain conditions...

See http://www.dvinfo.net/conf/showthread.php?t=804 for more info.

Noa Put · July 23rd, 2007, 10:17 AM

Quote:

Originally Posted by Chris Hurd

The "dancing lights" issue is a confirmed side-effect of the VAP-type O.I.S. in certain conditions...

See http://www.dvinfo.net/conf/showthread.php?t=804 for more info.

Thanks Chris for the link, since this is the first time in 3 years that I have seen this problem I'm not that worried about it but it is interesting to know what is causing it.

July 8th, 2007, 08:07 PM	#1
Andy Lunn Regular Crew Join Date: Feb 2007 Location: Leeds UK Posts: 94	why? having a little problem (with quicktime sample) Hello guys. After using the xlh1 on two jobs recently, I have had the same problem accur on both jobs. Can somebody tell what this is and how i stop it? http://media73.co.uk/why/forxlcinemaOnly.mov The camera was in full manual mode, but the lens had the stabaliser switch on as i was going handheld. I have also had a lens flare problem when lighting was lower than the camera, whats the best way to solve this? when space is restricted? aka inside a vehicle? I did have a matt box fitted. Any help on the above very appreciated as i cant work out what it is, new xl is only 2 weeks old. cheers ps. preset was panalook and these shots are not cc. heres a quick test footage clip for the client to view what we are doing. http://www.media73.co.uk/MotorHouse/MotorHouse.html

July 9th, 2007, 10:34 AM	#4
Cole McDonald Trustee Join Date: Nov 2005 Location: Sauk Rapids, MN, USA Posts: 1,675	turn the image stabilizer off. Those flares are much more obvious as they move when the prism does its thing to correct for the motion. Capture good footage in camera, then stabilize in post...practice holding very steady, which is more about relaxation than rigidity. Mount the camera on a tripod, that will help even more. beautiful pictures, BTW. __________________ Web Youtube Facebook

July 10th, 2007, 10:20 AM	#6
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,366 Images: 513	Nothing wrong with that camera and I've seen that sort of thing before. The dancing reflection is a lens flare which is definitely caused by OIS and is due to the angle in which the light is hitting the lens. As has been pointed out already by the replies above, there are a couple of ways to eliminate this issue. 1. Turn off OIS. Find a way to hard-mount the camera (tripod, bean bag, etc.) 2. Flag the incoming light with a lens hood extension such as a piece of cardboard. 3. Change the angle of the shot. Again -- there ain't nothing wrong with the camera. See above posts from Bill and Cole. __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!

July 11th, 2007, 09:24 AM	#8
Cole McDonald Trustee Join Date: Nov 2005 Location: Sauk Rapids, MN, USA Posts: 1,675	different stabilizing systems? __________________ Web Youtube Facebook

July 11th, 2007, 07:12 PM	#9
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,366 Images: 513	Yes there are different types of OIS... see http://www.dvinfo.net/conf/showpost....35&postcount=6 The Canon XL series lenses are the only ones using the VAP type as far as I know. __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!

July 8th, 2007, 08:16 PM	#2
Bill Pryor Contributor Join Date: Jan 2003 Location: Kansas City, MO Posts: 4,449	Looks like typical lens flare to me. Only way around that is to change your angle.

July 8th, 2007, 08:19 PM	#3
Andy Lunn Regular Crew Join Date: Feb 2007 Location: Leeds UK Posts: 94	So there is no other way? what if that IS THE best angle you need?

July 10th, 2007, 10:07 AM	#5
Noa Put Inner Circle Join Date: Jun 2007 Location: Belgium Posts: 9,509	Maybe a stupid question but can't you just return it to the store were you bought it from? As I'm depending on my camera's bigtime every week I have contacts with a technician from Sony for quick repairs, also all my new cameras were allways bought at a local dealer were I could go to during the warranty period if something would be wrong. I know this is not helping you much but I hope you will find a solution soon, these "dancing" reflections look like something I never seen before and are for sure not normal.

July 10th, 2007, 12:41 PM	#7
Noa Put Inner Circle Join Date: Jun 2007 Location: Belgium Posts: 9,509	That's very strange then, In almost 3 years time I never had this type of behaviour in my sony vx2100 and my panasonic dvx100b and I have filmed in comparable situations.

July 21st, 2007, 06:46 AM	#10
Noa Put Inner Circle Join Date: Jun 2007 Location: Belgium Posts: 9,509	Well, I couldn't believe it but I got yesterday the same problem, it occured when I was filming the dancingpart in the evening at a wedding, the DJ had these different colored spots and suddenly I saw 2 "dancing" bright blue dots in my viewfinder. They came from a very bright blue spot that was shining directly in my lens, even if I pointed a bit lower to the floor so I could'n see the spot anymore the bright dots were still there almost like thery were dancing to the music :D, only if turned away from the blue spot so it didn't shine in my lens the dots dissapeared. There were similar, but other colored spots used by the DJ but they didn't cause a problem.

July 21st, 2007, 12:50 PM	#11
Cole McDonald Trustee Join Date: Nov 2005 Location: Sauk Rapids, MN, USA Posts: 1,675	Interesting, I'm wondering if it's part of the coating on the prism perhaps that is reflecting just the blue wrong? Perhaps a light orange filtration + white balance would help take care of that. __________________ Web Youtube Facebook

July 21st, 2007, 08:46 PM	#12
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,366 Images: 513	The "dancing lights" issue is a confirmed side-effect of the VAP-type O.I.S. in certain conditions... See http://www.dvinfo.net/conf/showthread.php?t=804 for more info. __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!