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Old May 24, 2008, 12:20 PM   #1
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Help me! I've been playing around with the AF Adjustmet feature of my K20D this morning, and I think I'm losing it. I can't tell which looks better now. Sometimes -5 looks better than -6, sometimes -7 looks better than -5. Sometimes -5, -6, and -7 looks almost perfect, other times they don't. I'm starting to think my eyes are playing tricks on me.

Looking at this image, should I adjust it some or leave it as is?
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Old May 24, 2008, 12:26 PM   #2
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Or does this one look better?
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Old May 24, 2008, 12:29 PM   #3
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And finally... this one?
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Old May 24, 2008, 12:35 PM   #4
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Here is it with no adjustment for reference.
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Old May 24, 2008, 12:46 PM   #5
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I don't see a lot of difference on my monitor, except that the left line of text does not seem as sharp as the one on the right; no 1 seems to have that line a little sharper.
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Old May 25, 2008, 10:56 AM   #6
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Interesting that there doesn't seem to have all that much difference between them all. Any change you moved the tripod, camera or chart between photos? Just had to ask, though I expect your answer to be no.

As far as that - all of them appear to meet specification (the focus line is sharp). Do you find the lens focusing off inreal-world situations? In your unadjusted picture it appears to be slightly front focusing, while all of the other pictures appear right-on.

P.S. What I'd probably do is set it for the least amount of adjustment that looks right to me and then go out and take a bunch of pictures, seeing if it really is better.

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Old May 27, 2008, 6:40 AM   #7
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Difficult question

What I see (hope others do so to)
nr1 - centered focus, 50% focus in from, and 50% focus behind
nr2 - more normal focus, less in front in focus than behind
nr3 - more like nr2 but more behind.
nr4 - more in front than behind.

normally when you look at dof charts, the focus area is less in front and more behind the target, so I would go for nr2 - (nr3 would be better than nr1 in my book)

just my 5€c

Ronny



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Old May 28, 2008, 9:46 AM   #8
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Hi,

If you are going to adjust it then I would say number 2. But myself, I would leave it with no adjustment.

Rudy
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