OIS Visible? at DVinfo.net

Miguel Lombana · January 3rd, 2006, 08:14 PM

Question, is it normal for the OIS (Optical Image Stabilization) to be visible in shots where there is a glare from say a headlight or sunset?

I have 2 shots from a wedding that I shot 3 weeks ago where in one instance the sunset scene has a visible cast of 2 squares hovering below the sunset and they are moving horizonally and vertically. The same effect is visible in a scene where the limo is oncoming and the headlights are casting the same effect. These shots were done freehand without a tripod so the stabilizer had to do some work.

The shots are going to be hard to use now because after you see this a couple of times it becomes fairly obvious.

Anyone had this happen before, any way to counteract it?

Miguel

Jeff Miller · January 5th, 2006, 05:00 PM

Noone else chipped in on this so I'll just say that I've heard of situations where the variangle lens for OIS does somehow reflect visable light when a sharp light shines into it. A rentable example is the "Rocket Skates" scene in Jackass the movie. Look at all the sparklies around the lights!

This seems to happen more readily with my GL2 then the XL2. When I'm in the dark with the XL2, there's usually no light and all I get taped is black muck :/

That doesn't help much, but yes what you describe has come up before. Now I'm tempted to try it, I wonder if it's less noticable with OIS off?...

Miguel Lombana · January 5th, 2006, 08:51 PM

Quote:

Originally Posted by Jeff Miller

Noone else chipped in on this so I'll just say that I've heard of situations where the variangle lens for OIS does somehow reflect visable light when a sharp light shines into it. A rentable example is the "Rocket Skates" scene in Jackass the movie. Look at all the sparklies around the lights!

This seems to happen more readily with my GL2 then the XL2. When I'm in the dark with the XL2, there's usually no light and all I get taped is black muck :/

That doesn't help much, but yes what you describe has come up before. Now I'm tempted to try it, I wonder if it's less noticable with OIS off?...

I'll pull the scene into Divx tonight and post a link, maybe if a few people see what I'm talking about they might say - OH yea - you're screwed it will always do that, OR if you do x then it won't do that anymore.

ML

Larry Huntington · January 5th, 2006, 09:26 PM

This happens tomy XL2 when I shoot into bright lights at night with OIS on. The only way I know to stop this is to turn off OIS. Basically I think it is a light reflection of the moving lense inside itself. Maybe turning ND filter on would help.

Miguel Lombana · January 6th, 2006, 04:22 PM

Hey guys, I posted about 6 seconds of video showing the issue on my server. I posted this in both WMP and MPG formats the file names are below one should be workable just download to your machine, don't try to stream it, my bandwidth is limited. When you get it, look at the bouncing going on around the area of the sunset in the center of the screen

Miguel

http://www2.kd4iml.com:8080/sp-pics/...OYANCE_MPG.mpg -OR-
http://www2.kd4iml.com:8080/sp-pics/...MP-720x480.wmv

Laurence Kingston · January 6th, 2006, 04:56 PM

The same thing happens when I use deshaker in post. I think that a little bit of glare bouncing around is preferable to the whole shot shaking with only the glare staying in one place. My main reaction though watching your footage was amazement and admiration for how well the OIS on the XL2 is working. A little bit of glare or dirt on a lens really lets you see what the stabilization is doing!

Miguel Lombana · January 6th, 2006, 08:05 PM

Quote:

Originally Posted by Laurence Kingston

My main reaction though watching your footage was amazement and admiration for how well the OIS on the XL2 is working. A little bit of glare or dirt on a lens really lets you see what the stabilization is doing!

Well I never thought about it that way... yea and this isn't even the section that I would have printed on the final video, I chose this section cause of the objects being more obvious, the last 10 seconds of the actual shot were steadier cause I was solidly planted but none the less the gyro action is still on screen and I'm hesitant to give that to a client. Thanks.

BTW, Laurence this was shot down in your neck of the woods, outside the Kissimmee Civic Center, the ceremony and reception was supposed to have been in West Palm but Wilma put a stop to those plans and they had to move everything north. ML

January 3rd, 2006, 08:14 PM	#1
Miguel Lombana Major Player Join Date: Mar 2004 Location: Litchfield Park, AZ (W/of Phoenix) Posts: 502	OIS Visible? Question, is it normal for the OIS (Optical Image Stabilization) to be visible in shots where there is a glare from say a headlight or sunset? I have 2 shots from a wedding that I shot 3 weeks ago where in one instance the sunset scene has a visible cast of 2 squares hovering below the sunset and they are moving horizonally and vertically. The same effect is visible in a scene where the limo is oncoming and the headlights are casting the same effect. These shots were done freehand without a tripod so the stabilizer had to do some work. The shots are going to be hard to use now because after you see this a couple of times it becomes fairly obvious. Anyone had this happen before, any way to counteract it? Miguel __________________ Miguel Lombana http://www.miguellombana.com & http://www.phoenixhamradio.com

January 5th, 2006, 05:00 PM	#2
Jeff Miller Major Player Join Date: Nov 2004 Location: St Louis, MO Posts: 227	Noone else chipped in on this so I'll just say that I've heard of situations where the variangle lens for OIS does somehow reflect visable light when a sharp light shines into it. A rentable example is the "Rocket Skates" scene in Jackass the movie. Look at all the sparklies around the lights! This seems to happen more readily with my GL2 then the XL2. When I'm in the dark with the XL2, there's usually no light and all I get taped is black muck :/ That doesn't help much, but yes what you describe has come up before. Now I'm tempted to try it, I wonder if it's less noticable with OIS off?... __________________ (insert long list of expensive stuff)

January 6th, 2006, 04:22 PM	#5
Miguel Lombana Major Player Join Date: Mar 2004 Location: Litchfield Park, AZ (W/of Phoenix) Posts: 502	Hey guys, I posted about 6 seconds of video showing the issue on my server. I posted this in both WMP and MPG formats the file names are below one should be workable just download to your machine, don't try to stream it, my bandwidth is limited. When you get it, look at the bouncing going on around the area of the sunset in the center of the screen Miguel http://www2.kd4iml.com:8080/sp-pics/...OYANCE_MPG.mpg -OR- http://www2.kd4iml.com:8080/sp-pics/...MP-720x480.wmv __________________ Miguel Lombana http://www.miguellombana.com & http://www.phoenixhamradio.com

January 5th, 2006, 09:26 PM	#4
Larry Huntington Major Player Join Date: Nov 2005 Location: Grass Valley, California Posts: 350	This happens tomy XL2 when I shoot into bright lights at night with OIS on. The only way I know to stop this is to turn off OIS. Basically I think it is a light reflection of the moving lense inside itself. Maybe turning ND filter on would help.

January 6th, 2006, 04:56 PM	#6
Laurence Kingston Major Player Join Date: Aug 2004 Location: Clermont, FL. Posts: 941	The same thing happens when I use deshaker in post. I think that a little bit of glare bouncing around is preferable to the whole shot shaking with only the glare staying in one place. My main reaction though watching your footage was amazement and admiration for how well the OIS on the XL2 is working. A little bit of glare or dirt on a lens really lets you see what the stabilization is doing!