creeping focus at DVinfo.net

Ben Westaway · October 13th, 2009, 12:08 PM

Has anyone experienced a problem with their cameras in that the focus seems to creep outwards in macro mode?

On a shoot at the weekend, with objects pushed right up to the lens and with the peaking on, whilst focusing onto the closest part of the object to the lens, I noticed that as I let go of the focus ring the band of peaking slowly drifted further along the object.

The only way that I could maintain focus on the nearest point of the object was to slowly but continuously focus closer. The focal plane definitely moves in the rushes when played back too.

Auto focus was definitely off before anyone asks!

Anyone else had this? Is it a send back to sony job?

Dave Morrison · October 16th, 2009, 02:17 PM

I had this same issue with my EX1 while doing some Macro work. The focus "hunting" was being caused by "MF Assist" being turned on. It quit doing this creeping when I turned it off.

Doug Jensen · October 16th, 2009, 08:24 PM

Ben, macro does not function at all in full-manual focus mode. So, like Dave says, you must have one of the auto-focus assist modes turned on and don't know it. There is nothing wrong with your camera.

October 13th, 2009, 12:08 PM	#1
Ben Westaway New Boot Join Date: Jan 2009 Location: London England Posts: 13	creeping focus Has anyone experienced a problem with their cameras in that the focus seems to creep outwards in macro mode? On a shoot at the weekend, with objects pushed right up to the lens and with the peaking on, whilst focusing onto the closest part of the object to the lens, I noticed that as I let go of the focus ring the band of peaking slowly drifted further along the object. The only way that I could maintain focus on the nearest point of the object was to slowly but continuously focus closer. The focal plane definitely moves in the rushes when played back too. Auto focus was definitely off before anyone asks! Anyone else had this? Is it a send back to sony job?

October 16th, 2009, 02:17 PM	#2
Dave Morrison Major Player Join Date: May 2002 Location: West Central Florida Posts: 762	I had this same issue with my EX1 while doing some Macro work. The focus "hunting" was being caused by "MF Assist" being turned on. It quit doing this creeping when I turned it off. __________________ EX1, Nikon D750 http://www.morrisonphotographics.com http://www.heritagefilm.com

October 16th, 2009, 08:24 PM	#3
Doug Jensen Vortex Media Join Date: Jan 2009 Location: Florida Posts: 3,487	Ben, macro does not function at all in full-manual focus mode. So, like Dave says, you must have one of the auto-focus assist modes turned on and don't know it. There is nothing wrong with your camera. __________________ Vortex Media http://www.vortexmedia.com/ Sony FS7, F55, and XDCAM training videos, field guides, and other production tools