Hello:

I am a new Canon EOS 1Ds Mark III owner and would like to ask some questions about this camera.

I am an aerial photographer and plan to use my new camera as an aerial camera.

1) At what ISO level does the noise show up on a this camera?

2) What shutter speeds to compensate for vibration of the aircraft should I use for all focal lengths or my 24mm-70mm Canon Zoom lens?

3) What affect does the anti-vibration

3) At what ISO should I be to use the fastest shutter speeds of 1/500th and 1/1000 second? Will this setting give me undesirable noise?

Thanks

4) Is the 70mm end of the zoom considered a normal angle lens for this camera? Is that considered equivalent to a 50mm as a normal lens for a 35mm camera?

#1) At all levels if you look hard enough for it. How much is too much depends on you.
#2) What speeds worked for you in the past? Are you shooting from a helicopter or a Cessna?
#3) Virtually any ISO will work - depends on your aperture too
#4) A 70mm is a 70mm. Your camera has a full-frame imaging sensor (same area and aspect ratio to 35mm film).

You're going to find that the digital camera will behave much like your film camera.

Increase the ISO and you get noise, like with film you get more grain.
All films have grain, all digital images show noise if you look hard enough.
You'll have to shoot some test shots I think to see at what point you notice the noise, you should be OK up to 400 and perhaps 800 ISO.

The same shutter speeds that work on film ought to work on digital at the same ISO, I don't think you're going to get any surprises if you previously worked with 35mm.
Because the 1Ds mkIII has a 35mm film size sensor it should all look like the 35mm film cameras you're familiar with. So 50mm will be a normal lens just like with 35mm film.

If you have an Image Stabilised lens then I'd be interested to see images with it turned on and off, I've never done a shoot from the air, so I don't know many stops slower shutter speed you could use. It may be that grounds speed is the limiting factor, not vibration?

wow .... seems interesting shooting from an airplane .... id like to see that....