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Thread: AF Microadjustment, which way to go

  1. #1
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    AF Microadjustment, which way to go



    So which way to go, using lensalign to set the AF for my 24-70mm I can't decide which setting to use. I ran a series of 4 sets and this is the average. Each test was consistent.


    Plus 1 gives me 49 shots Front Focus, 18 shots On Focus and 17 shots Back Focus.


    Plus 2 gives me 25 shots Front Focus, 14 shots On Focus and 41 Back Focus.


    So should I go with Plus 1 which Front Focus's slightly more often.


    Or Plus 2 that Back Focus's slightly more often.


    Which would give the best results?

  2. #2
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    Re: AF Microadjustment, which way to go



    Is this at 24mm or 70mm?

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    Re: AF Microadjustment, which way to go



    70mm

  4. #4
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    Re: AF Microadjustment, which way to go



    Sorry just making sure this was at 70mm. Is there a reason you took 4 more shots with plus 1? I'd probably go plus 1.. I have heard, although not tested my self, that focus accuracy will change with hot/cold temperature changes.


    Its really hard to say. Where do you normally focus on a persons face? If you are focusing on anywhere other than their eye, I would go with the setting that has a stronger bias towards back focusing. If you focus on the eye then go the opposite. Hope I didn't get that backwards but you get the idea.

  5. #5
    Senior Member neuroanatomist's Avatar
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    Re: AF Microadjustment, which way to go



    In that focal range, DoF is unevenly distributed around the focal point - more is in focus behind the focal point than in front. So, I'd go with +1.

  6. #6
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    Re: AF Microadjustment, which way to go



    Thanks Guys


    I am going to go on with Plus 1 to see how it looks

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