Left side of frame out of focus? K10D

senojjj · 09-28-2010, 06:19 PM

I'm having an odd, intermittent problem with my K10d. Occasionally, a shot will be out of focus/blurry on the left side of the frame. It's happened in situations where I can't believe it's my fault, like this shot- lens at 22mm, focused at infinity, f8 and 1/750, so I don't think it could be a focus, depth of field or camera shake problem. It's happened at different focal lengths, and at different focusing distances. I use a Sigma 18-200 lens. Any thoughts would be greatly appreciated.

Attached Images

hcarvalhoalves · 09-28-2010, 06:39 PM

It's possible the lens elements or/and the sensor are misaligned. Do you have another lens to test?

aleonx3 · 09-28-2010, 06:55 PM

Looks like a de-centering problem on the lens. That is if the focus point is in dead center, both left and right sides should have equal sharpness.

Marc Sabatella · 09-29-2010, 05:17 PM

Kind of hard to say, though, given the small size of image posted. Can you post unresized crops from both sides?

JonPB · 09-29-2010, 05:25 PM

If it is intermittent, then it probably isn't the sensor.

Have you taken a test shot of a wall? Being perpendicular to a flat, textured surface like a brick wall can help identify the characteristic of problems like this.

jjdgti · 09-29-2010, 06:13 PM

Originally posted by JonPB

If it is intermittent, then it probably isn't the sensor.

Have you taken a test shot of a wall? Being perpendicular to a flat, textured surface like a brick wall can help identify the characteristic of problems like this.

I was about to suggest that. Or a big sing with letters Being perpendicular to.

09-28-2010, 06:19 PM	#1
senojjj Inactive Account Join Date: Sep 2010 Location: East Coast Posts: 1	Left side of frame out of focus? K10D I'm having an odd, intermittent problem with my K10d. Occasionally, a shot will be out of focus/blurry on the left side of the frame. It's happened in situations where I can't believe it's my fault, like this shot- lens at 22mm, focused at infinity, f8 and 1/750, so I don't think it could be a focus, depth of field or camera shake problem. It's happened at different focal lengths, and at different focusing distances. I use a Sigma 18-200 lens. Any thoughts would be greatly appreciated. Attached Images

09-28-2010, 06:39 PM	#2
hcarvalhoalves Pentaxian Join Date: Aug 2010 Location: São Paulo, Brazil Photos: Gallery Posts: 1,019	It's possible the lens elements or/and the sensor are misaligned. Do you have another lens to test? Last edited by hcarvalhoalves; 09-28-2010 at 06:45 PM.

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09-28-2010, 06:55 PM	#3
aleonx3 Veteran Member Join Date: Jul 2007 Location: Brampton, Ontario Photos: Gallery \| Albums Posts: 3,996	Looks like a de-centering problem on the lens. That is if the focus point is in dead center, both left and right sides should have equal sharpness.

09-29-2010, 05:17 PM	#4
Marc Sabatella Veteran Member Join Date: Sep 2006 Location: Denver, CO Photos: Gallery Posts: 10,685	Kind of hard to say, though, given the small size of image posted. Can you post unresized crops from both sides?

09-29-2010, 05:25 PM	#5
JonPB Veteran Member Join Date: Sep 2008 Location: Portland, OR, USA Photos: Gallery \| Albums Posts: 430	If it is intermittent, then it probably isn't the sensor. Have you taken a test shot of a wall? Being perpendicular to a flat, textured surface like a brick wall can help identify the characteristic of problems like this.

09-29-2010, 06:13 PM	#6
jjdgti Veteran Member Join Date: Jun 2008 Location: NJ Posts: 1,824	Originally posted by JonPB If it is intermittent, then it probably isn't the sensor. Have you taken a test shot of a wall? Being perpendicular to a flat, textured surface like a brick wall can help identify the characteristic of problems like this. I was about to suggest that. Or a big sing with letters Being perpendicular to.