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Third repair attempt fails

agitater

Toronto, CA
4527 posts

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"RE: Third repair attempt fails"

agitater Gold Member Donor Ribbon awarded for his very generous support to the Fundraising Campaign 2014 Nikonian since 18th Jan 2007
Thu 31-Jan-13 06:03 PM

>The methodology is not about testing the efficiency of the
>whole AF system in real life situations. It is about testing
>wether or not, on the simplest possible target, phase
>detection produces front or back focusing.

I understand your approach. What I'm suggesting is that I believe the simplification is largely counterproductive because I think it inherently prevents the chosen sensor (which is part of a larger system) from functioning most effectively (as a fundamental part of the larger system) for the application dictated by your methodology. Some AF system experts should chime in here I think.

>If the camera is not successful at properly focusing such a
>target, it's a clear sign there is a problem. You cannot hope
>to get good results in real life situations like you describe
>if the camera cannot even handle ideal conditions. It's just
>step zero in the troubleshooting strategy.

My point is that the condition you set up in your methodology is not in fact ideal. I believe that isolating a target to provide, effectively, a single data registration point for the AF system, does not reflect the engineering or software design approach of the AF system. The AF system is designed to work best, as I understand it, when provided with significantly more target and proximal data than is provided when using your method.

>Here is what I would recommend to people about the whole fine
>tuning business:
>
>1) Just use your camera without worrying about it. If you get
>a high percentage of pictures in focus, everything is fine. No
>need to shoot targets. Out of focus images will happen, no
>system is 100% accurate and the number of bad images will
>decrease as you will gauge better how you system behaves.

Well said.

>2) If you systematically get out of focus images, it is either
>you that has poor technique or your camera needs to be
>checked.

Very well said again.

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This is a hot, active topic! Third repair attempt fails [View all] , johno Silver Member , Tue 25-Dec-12 02:58 PM
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