EX1 Loss of focus at Infinity at DVinfo.net

Bruce Rawlings · June 27th, 2011, 08:57 AM

My EX1 has been superb till now. For some reason I now cannot focus at infinity. I have checked the back focus which is fine and Autoflanged under controlled conditions with Seimens charts just in case. This did nothing, the problem is still there. Does anyone have ideas before I contact Sony. By the way classic back focus symptom of soft at wide angle is not present. Will try to work out how to load a picture example later.

Mitchell Lewis · June 27th, 2011, 12:09 PM

I had a back focus issue with our EX3 (after it took a nose dive off the tripod!) and doing the automatic back focus outlined in the manual fixed the problem. (we were very lucky!)

Alister Chapman · June 27th, 2011, 07:49 PM

Don't backfocus an EX1 or EX3 with a siemens chart, you often won't get good results. Use a flat textured surface such as a brick wall or wall with a patterned wall covering. Make sure the camera is at least 3m (9ft) from the wall, preferably 4m (12ft) or more for best results.

Bruce Rawlings · June 28th, 2011, 11:47 AM

Thanks for info Alister. Will try Autoflange again.

Alister Chapman · June 28th, 2011, 09:45 PM

Good luck Bruce, You can always take the EX to the drop-in service center at the Sony Tech Center in Pencoed, one of Sony's best kept secrets!

Bruce Rawlings · June 30th, 2011, 08:25 AM

Being in Cardiff I know that secret - will give them a call. Thanks.

June 27th, 2011, 08:57 AM	#1
Bruce Rawlings Major Player Join Date: Feb 2008 Location: Cardiff, Wales, UK Posts: 410	EX1 Loss of focus at Infinity My EX1 has been superb till now. For some reason I now cannot focus at infinity. I have checked the back focus which is fine and Autoflanged under controlled conditions with Seimens charts just in case. This did nothing, the problem is still there. Does anyone have ideas before I contact Sony. By the way classic back focus symptom of soft at wide angle is not present. Will try to work out how to load a picture example later.

June 27th, 2011, 12:09 PM	#2
Mitchell Lewis Trustee Join Date: Dec 2008 Location: Kennewick, WA Posts: 1,124	Re: EX1 Loss of focus at Infinity I had a back focus issue with our EX3 (after it took a nose dive off the tripod!) and doing the automatic back focus outlined in the manual fixed the problem. (we were very lucky!) __________________ Sony EX3, Canon 5D MkII, Chrosziel Matte Box, Sachtler tripod, Steadicam Flyer, Mac Pro, Apple/Adobe software - 20 years as a local videographer/editor

June 27th, 2011, 07:49 PM	#3
Alister Chapman Inner Circle Join Date: Dec 2005 Location: Bracknell, Berkshire, UK Posts: 4,957	Re: EX1 Loss of focus at Infinity Don't backfocus an EX1 or EX3 with a siemens chart, you often won't get good results. Use a flat textured surface such as a brick wall or wall with a patterned wall covering. Make sure the camera is at least 3m (9ft) from the wall, preferably 4m (12ft) or more for best results. __________________ Alister Chapman, Film-Maker/Stormchaser http://www.xdcam-user.com/alisters-blog/ My XDCAM site and blog. http://www.hurricane-rig.com

June 28th, 2011, 11:47 AM	#4
Bruce Rawlings Major Player Join Date: Feb 2008 Location: Cardiff, Wales, UK Posts: 410	Re: EX1 Loss of focus at Infinity Thanks for info Alister. Will try Autoflange again.

June 28th, 2011, 09:45 PM	#5
Alister Chapman Inner Circle Join Date: Dec 2005 Location: Bracknell, Berkshire, UK Posts: 4,957	Re: EX1 Loss of focus at Infinity Good luck Bruce, You can always take the EX to the drop-in service center at the Sony Tech Center in Pencoed, one of Sony's best kept secrets! __________________ Alister Chapman, Film-Maker/Stormchaser http://www.xdcam-user.com/alisters-blog/ My XDCAM site and blog. http://www.hurricane-rig.com

June 30th, 2011, 08:25 AM	#6
Bruce Rawlings Major Player Join Date: Feb 2008 Location: Cardiff, Wales, UK Posts: 410	Re: EX1 Loss of focus at Infinity Being in Cardiff I know that secret - will give them a call. Thanks.