I can not find the equivalent for all these settings.
Hi 2 = 25,600
Hi 1 = 12,800
0.7 = ?
0.3 = ?

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They are not full stops. Shoot a frame at each, and pull it into your software. It will tell you what it is.

I believe .3 is around 8000, and .7 is 10,000 or so. I did it when I first got the camera, but don't remember now.

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Webpage: http://www.ptfphoto.com

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I am rather perplexed that Nikon does not spell this (and other things)
out for us in their manual, spec sheets, and camera display.

I guess I will just have to shoot all the AutoISO settings
in the worst possible (cloudy day in dense Redwood forest) conditions
to find out what works best.

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You can think of these as 1/3 & 2/3 stops, and apply them to your photography without knowing more than that e.g. Increasing ISO from 6400 to Hi0.3 will allow you to increase shutter or stop down aperture 1/3 stop (1 click of the wheel if you're set to change in 1/3 stop increments).

Mathematically you can calculate this by simply Max ISO x 2^number of stops.

ISO 6400 * 2^1 (Hi1) = ISO 12800
ISO 6400 * 2^2 (Hi2) = ISO 25600

Assuming "0.3" is rounded from 1/3 and "0.7" is rounded from 2/3...

ISO 6400 * 2^(1/3) (Hi0.3) = ISO 8063
ISO 6400 * 2^(2/3) (Hi0.7) = ISO 10159
ISO 6400 * 2^(3/3) (Hi1.0) = ISO 12800
ISO 6400 * 2^(4/3) (Hi1.3) = ISO 16127
ISO 6400 * 2^(5/3) (Hi1.7) = ISO 20319
ISO 6400 * 2^(6/3) (Hi2.0) = ISO 25600

...much easier to think of these in stops and adjust shutter/aperture accordingly, then to try to calc, no? (unless you have Excel handy)

BTW I can't think of a much better day than shooting in a Redwood forest on a cloudy day!

Larry - a Bay Area Nikonian
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www.tempered-light.com

>
>BTW I can't think of a much better day than shooting in a
>Redwood forest on a cloudy day!
>Quote<<<

Yes there is a better situation and this shooting in a cool Redwood Forest on a hot day.
And a worst situation is one We face at an Equestrian Event:
inside a poorly lit barn that is open around the bottom.
The horses are too dark and the background to bright.
You have to be very careful not to just end up with silhouettes.

Here is the picture I just took at Hi2 or 25600 ISO
resized and saved at 82%

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Attachment #1, (jpg file)