[nathanm]

Is there such thing as a camera where you set your desired shutter speed AND ƒ-stop and the camera dynamically adjusts the ISO sensitivity to get the correct exposure?

[nathanm]

Yes, it's called TAv mode.  Ever heard of Google?

[nathanm]

Look, I'm sorry...sometimes I like to throw out questions to the forum instead of just looking it up.

[nathanm]

Okay, but don't let it happen again.

[JohnR]

Who?

Or more to the point... why?

[thunderbrick]

The answer to why is who.  Nuff said?   

[low.pfile]

I have to say "Don't knock it till you try it."

Seriously.

Initially, I never turned on "Auto ISO" on my D700, because I know how to adjust the ISO to get the shutter speed range I need when on Aperture Priority mode, but after reading some discussions I decided to give it a try. For me, it is a very useful feature. Just set the lowest acceptable shutter speed and maximum ISO allowed.....once the metering measures an exposure below that shutter speed is kicks up the ISO to give you the same exposure. Today, the D700 and many new digital cameras have very impressive sensors, the high ISO are . That said, this mode isn't necessary for still life, landscape and studio work, but is very advantageous for candids,  street, and documentary shooting, where the lighting can change instantaneously. The latter is what I like to shoot.

On the D700, I can set one of the discrete function buttons (programmable) to be the toggle for this feature on or off. 2 presses and done.

I had only used Auto ISO in Aperture Priority but just realized this week that it works in Manual mode as well, as Nathanm asked.

[Wind Chaser]

Letting the camera make some choices is one thing, but ISO is too sacred for AI. 

[low.pfile]

Letting the camera make some choices is one thing, but ISO is too sacred for AI.

^^^ yep, that is what I used to think too, prior to the D700. so many cameras have great results with high ISO. the low ISO, shiny glossy uber-realism shots are boring to me. besides I actually like a bit of grain character to my images.
I just want to capture the moment.
and it can always be switched off.

[low.pfile]

As stated I've only recently experimented with Auto ISO on the D700. Today I happened to have my camera with me so I did a quick experiment.

I have a few sample shots taken from my office, through a dirty double window. using Auto ISO in manual mode. The manual exposure mode preset settings were  ISO 800(overridden), 1/500s, and then cycled through the apertures:

above is a thumbnail of 100% crops

[Click here] for all of the samples here including full size 100% crops

BTW, No image editing eg. noise reduction, sharpening on these images.

cheers, ed

[Goosepond]

I guess I'm dense. I shoot manual with my Canon body.

I don't understand auto ISO w/manual?

Gene

[nathanm]

When I was trying to shoot at the Roger Waters show I was wishing for this mode.  Basically I wanted to leave the lens wide open but use a fast enough shutter speed and then let the camera adjust the ISO.