AF-ON alternative buttons on D600/D610

Started Jan 30, 2014 | Discussions thread
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AF-ON alternative buttons on D600/D610
Jan 30, 2014

Short summary: this is about AF-ON assigned to DoF preview button or Fn button.

I'm deciding between D800 and D610. I have D90, but have played with friend's D3 (few weeks ago), D700 (yesterday) and D600 (long time ago). I know about most of differences, in fact I have wrote down my knowledge of differences here:

What I have started to appreciate is the AF-ON button on the D700. I have never used it on D90 where I rather rocked a lot with AF-MF lever as on D90 to decouple AF from shutter release. The AE-L/AF-L (in AF-ON mode) on D90 is too far left for comfortable one hand operation for me. With two hands, I can reach for it well enough, but with one hand holding the camera it is not right for me.

My D800 concern is with weight as flash and Sigma primes I have (50/1.4, 85/1.4) weight a lot (and there are some other concerns but this one is biggest). I have measured D700 with Sigma 50 and SB-600 and it was just over 2kg. D800 is lighter than D700 by about 90g, but D610 would be better by additional 150g. So I'm still investigating D610.

D600/D610 is similar in AF-ON use to D90. On both cameras the AE-L/AF-F button can work as AF-ON. But on both it is too far left from my ideal thumb position. I would likely use AF-ON on more on D610 than on D800 as AF coverage is worse.

I have however found out in D610 manual that AF-ON can be selected as function for DoF preview button or Fn button. Has anybody tried such combination? Is it more comfortable than AF-ON assigned to AE-L/AF-L button? Does it work for you?

For those who do not use AF-ON, here is a description of what it does on D700 and D800:

Nikon D600 Nikon D610
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