DX vs FX: High ISO shooting and DoF

Started Nov 25, 2012 | Discussions thread
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phiri
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DX vs FX: High ISO shooting and DoF
Nov 25, 2012

I currently use a D7000 with lenses 28mm f1.8G, 50mm f1.8G, 85mm F1.8G and 70-300mm VR. My aim is to add a D600 to make the most use of my lenses while keeping the D7000 for the 70-300mm VR. However one thing that confuses me and where I would like others to chime in is on the high ISO advantages and DoF.

Assuming that I use a D7000 and I get a good DoF with 28mm at F2. If I use a D600, my understanding is that I have to use F2.8 to have a similar DoF. Now that is a stop slower that requires doubling of the ISO. By doing this, is it not cancelling the advantage of the FX in terms of high ISO? Assuming that the D600 has one stop advantage over D7000 in high ISO, will this not equalise itself if Dof is to be equalised? I am still getting the D600 but just wanted to know how best to maximise output.

This is snapshot I took today of my son at Iso 5000. Of course the light was even so not the most difficult situation for the camera.

 phiri's gear list:phiri's gear list
Nikon D7000 Nikon 1 J1 Nikon D600 Nikon AF-S Nikkor 70-300mm f/4.5-5.6G VR Nikon AF-S Nikkor 50mm f/1.8G +6 more
Nikon D600 Nikon D7000
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