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07/24/2006 10:23:31 PM · #1 |
Recently, I took many shots at an event. At this session, I used many times the edge focus point of the D200. I notice I have more out of focus shots when using outside focus points than when using the center one.
At this session, I used the 17-35mm mostly at 1/100s, shooting stationary subject. I used the tripod too, but with loose head.
I am pretty much ruling out motion/hand shake blur since 1/100s with 35mm focal length should be enough.
So I am thinking auto focus precision between center and edge focus points.
Did anybody ever noticed focusing differences between focus points or is it just me? |
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07/24/2006 10:27:06 PM · #2 |
Is your camera set in lock focus mode or in continual focus mode? If the latter, your peripheral subjects may be moving off the selected focus point as you compose.
R.
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07/24/2006 10:30:10 PM · #3 |
Originally posted by Bear_Music:
Is your camera set in lock focus mode or in continual focus mode? If the latter, your peripheral subjects may be moving off the selected focus point as you compose.
R. |
I was using the S mode (stands for single focus I think), not continous focus mode. |
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07/24/2006 10:34:22 PM · #4 |
Well, then, I donno... The peripheral focus points work fine for me on a 20D...
R.
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07/24/2006 10:36:31 PM · #5 |
| Can you post some examples? Sometimes seeing what you're referring to helps in coming up with an explanation. |
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07/24/2006 11:01:29 PM · #6 |
Originally posted by cpanaioti:
Can you post some examples? Sometimes seeing what you're referring to helps in coming up with an explanation. |
That would be one example:
I used the top most focus point for this one, on the brides face.
Background looks more sharp than subjects.
Message edited by author 2006-07-24 23:02:01. |
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07/24/2006 11:03:56 PM · #7 |
It may be just me but the focus seems to be behind the bride.
Also, if you could post a 640 x640 crop (no resize) of the area around the bride's head that would help with evaluating the focus as well. |
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07/24/2006 11:05:49 PM · #8 |
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07/24/2006 11:28:47 PM · #9 |
Originally posted by faidoi:
Diopter checked? |
The diopter has nothing to do with how the camera auto-focuses, it just compensates for your eyesight looking through the viewfinder. |
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07/24/2006 11:30:23 PM · #10 |
Originally posted by fplouffe:
Originally posted by cpanaioti:
Can you post some examples? Sometimes seeing what you're referring to helps in coming up with an explanation. |
That would be one example:
I used the top most focus point for this one, on the brides face.
Background looks more sharp than subjects. |
You might have a problem with either the lens or the camera back-focussing. Test the camera with another lens and see if you get back focussing again. |
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07/25/2006 12:26:01 AM · #11 |
It seems to me that's WAY too much of a focus shift to be accounted for by "back focus"... I could be wrong. It sure looks like placement of the focus point wasn't accurate and the hedge was what got focused...
R.
The topmost point is in the center of the focusing screen from left to right, and the bride's face is off-center to the left slightly, it may very well be grabbing the hedge...
Message edited by author 2006-07-25 00:28:01.
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