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09-17-2012, 06:49 PM   #1
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Too large focus point issue?

Hi All,

I am having issues with focus. I am using the FA 35mm 2.0 lens on the Pentax k-5. When shooting a subject relatively close, the focus is spot on, but from a distance it misses almost every time. So is this a too large focus point issue that I have heard about? If so what can I do to increase my success rate of an in-focus image from a distance. I mainly shoot pets so I need to focus quickly and shoot. See the examples below:

All were taken at:
ISO 800
f 2.0
Shutter 1/500
Center focus
All photos focused on the flower in the center

1209_focus_problems_003 | Flickr - Photo Sharing!

1209_focus_problems_001 | Flickr - Photo Sharing!

1209_focus_problems_002 | Flickr - Photo Sharing!

09-17-2012, 06:51 PM   #2
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It appears so. That last shot definitely seems like the camera's center point decided the background green was more contrasty.

You CAN try another trick though - shift the center point around to see if it does anything. Sometimes my k-x's center point wants to focus on the rear stuff, but if I adjust my center point to get two legs of the + to cover the subject, it will focus.
09-17-2012, 07:03 PM   #3
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Can you see what is in focus in the viewfinder when you are shooting? With such a busy scene, moving the composition slightly one way or the other will change what is in focus. If you can't see it however, you can't select the one you want.

I used my 170-500 lens this weekend shooting small birds in the bushes. I had a stable platform, a monopod with gimbal, so I could keep the aim steady. I was able to focus on small birds between branches by changing the composition slightly and depressing the shutter button halfway. I think the difference may be the focus screen; I could see clearly what was in focus or not.
09-17-2012, 07:15 PM   #4
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Liveview really helps solve this problem.


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