D600 . AF in tungsten light

Started Feb 7, 2013 | Discussions thread
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surrephoto Regular Member • Posts: 273
Re: Not to difficult

Your reply was somewhat too simplified for me to grasp, but I get what u're saying...

My question then, If we adjust the AF Sub-mirror, will this reduce the difference of focus in normal light & tungsten light?

Eg.

Before adjusting AF Sub-mirror

D600 + 14-24 @ 14 mm, f/2.8

5500k Light = AFMA -5

2800k Light = AFMA -18

After adjusting AF Sub-mirror

D600 + 14-24 @ 14 mm, f/2.8

5500k Light = AFMA +3

2800k Light = AFMA -3

Is this a possible scenario of such improvements in the difference of AFMA values? I do know that you can compensate for the difference by adjusting AFMA to a middle value (eg. -10 in case 1), but what I want to know is whether adjusting the sub-mirror will reduce the difference.

Mr Stijn of Nikon NL does not agree that a sub-mirror adjustment it will change the difference between the AFMA values in varying color temperatures.

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