Focusing issue at DVinfo.net

Patrik Vale · July 2nd, 2012, 02:53 PM

We have been shooting some music videos in the last days, and had a problem with focus. We used two EX1 and one EX3, and sometimes it wasn`t possible to fully focus the shot. I turned on peaking, and shot at its maximum, then when we put the footage on big screen, we saw the problem. It was even possible to see on small camera LCD that it is not fully focused. I checked several times that macro is turned off.
I`m trying to think if it is because of high temperature, as we were shooting at around noon, with temperature around 30-40 celsius?

I have attached few frame grabs from ClipBrowser so that you can see what I am talking about..

Does anyone had a similar problem? How can it be fixed?

Thanks for help

Les Wilson · July 2nd, 2012, 04:44 PM

Could be in need of resetting the back-focus: http://www.dvinfo.net/forum/sony-xdc...ml#post1524295

Zoran Vincic · July 2nd, 2012, 05:17 PM

Yup, backfocus, you can see clearly in the first screengrab that it is shifted forward. Do the procedure and everything will be fine.

Pula? :)

Jack Zhang · July 2nd, 2012, 08:24 PM

Start with your EX3 because that is much easier to access the backfocus menu. Go into "LENS > Auto FB ADJ" to do the auto backfocus. For your EX1s, you'll have to gain access to your Maintenance Menu in order to do an auto backfocus.

Patrik Vale · July 16th, 2012, 10:51 AM

Thanks for very quick help..I have adjusted the back focus now. Some people say that it drifts away with some time..
@Zoran, tako je, jedan smo spot snimali u Areni :)

Alister Chapman · July 17th, 2012, 12:48 AM

I found mine would need adjusting after being transported or bumped around in the back of a car on rough roads.

Jamie Roberts · July 20th, 2012, 07:37 AM

Did the back focus adjustment on my ex1 after I noticed some wide images getting too soft and have definitely noticed an improvement. It was probably long overdue!

Jamie

Chuck Fishbein · July 21st, 2012, 06:48 PM

Back focus certainly could have caused this issue, but as you were in direct sunlight at noon, is it possible that your exposures were beyond 5.6? The EX1/3 lens image quickly begins to fall apart beyond that point. f/6.7 might pass, but if you are down at f/11 or f/16 chances are you will get images this soft.

July 2nd, 2012, 02:53 PM	#1
Patrik Vale Regular Crew Join Date: Mar 2009 Location: Croatia Posts: 50	Focusing issue We have been shooting some music videos in the last days, and had a problem with focus. We used two EX1 and one EX3, and sometimes it wasn`t possible to fully focus the shot. I turned on peaking, and shot at its maximum, then when we put the footage on big screen, we saw the problem. It was even possible to see on small camera LCD that it is not fully focused. I checked several times that macro is turned off. I`m trying to think if it is because of high temperature, as we were shooting at around noon, with temperature around 30-40 celsius? I have attached few frame grabs from ClipBrowser so that you can see what I am talking about.. Does anyone had a similar problem? How can it be fixed? Thanks for help Attached Thumbnails

July 2nd, 2012, 04:44 PM	#2
Les Wilson Inner Circle Join Date: Jan 2004 Location: Boca Raton, FL Posts: 3,014	Re: Focusing issue Could be in need of resetting the back-focus: http://www.dvinfo.net/forum/sony-xdc...ml#post1524295

July 2nd, 2012, 05:17 PM	#3
Zoran Vincic Regular Crew Join Date: Jul 2010 Location: Split, Croatia Posts: 189	Re: Focusing issue Yup, backfocus, you can see clearly in the first screengrab that it is shifted forward. Do the procedure and everything will be fine. Pula? :)

July 2nd, 2012, 08:24 PM	#4
Jack Zhang Inner Circle Join Date: May 2005 Location: Burnaby, BC, Canada Posts: 3,053	Re: Focusing issue Start with your EX3 because that is much easier to access the backfocus menu. Go into "LENS > Auto FB ADJ" to do the auto backfocus. For your EX1s, you'll have to gain access to your Maintenance Menu in order to do an auto backfocus.

July 16th, 2012, 10:51 AM	#5
Patrik Vale Regular Crew Join Date: Mar 2009 Location: Croatia Posts: 50	Re: Focusing issue Thanks for very quick help..I have adjusted the back focus now. Some people say that it drifts away with some time.. @Zoran, tako je, jedan smo spot snimali u Areni :)

July 17th, 2012, 12:48 AM	#6
Alister Chapman Inner Circle Join Date: Dec 2005 Location: Bracknell, Berkshire, UK Posts: 4,957	Re: Focusing issue I found mine would need adjusting after being transported or bumped around in the back of a car on rough roads. __________________ Alister Chapman, Film-Maker/Stormchaser http://www.xdcam-user.com/alisters-blog/ My XDCAM site and blog. http://www.hurricane-rig.com

July 20th, 2012, 07:37 AM	#7
Jamie Roberts Major Player Join Date: Feb 2006 Location: bendigo, australia Posts: 204	Re: Focusing issue Did the back focus adjustment on my ex1 after I noticed some wide images getting too soft and have definitely noticed an improvement. It was probably long overdue! Jamie

July 21st, 2012, 06:48 PM	#8
Chuck Fishbein Major Player Join Date: Jun 2008 Location: Weehawken New Jersey Posts: 210	Re: Focusing issue Back focus certainly could have caused this issue, but as you were in direct sunlight at noon, is it possible that your exposures were beyond 5.6? The EX1/3 lens image quickly begins to fall apart beyond that point. f/6.7 might pass, but if you are down at f/11 or f/16 chances are you will get images this soft.