BebuLamar

If you shoot manual and use auto ISO and use the same aperture and shutter speed that you used with ISO64 then the camera would also choose ISO64.
When you have the camera picked high ISO because you think now you can set f/22 and 1/8000 as I want and the camera will take care of the exposure. It does and has no choice but pick an extremely high ISO.

joer Loc: Colorado/Illinois

Auto ISO. When shooting fast action in manual and in changing light, you can fix the aperture and shutter speed and the camera will maintain exposure. Indispensable for BIF and sports.

In A and S it also works. It kicks in when you hit the range limit in the setting. Ex: shutter fixed in S, aperture floating to match lighting, aperture out of range, ISO kicks in.

Every setting in the camera has it's uses at some point. Modern cameras react in milliseconds, humans don't. The key is knowing the limitations of your camera.

Architect1776 Loc: In my mind

Interesting, manual with auto ISI? Isn't that shooting auto?

Sidwalkastronomy Loc: New Jersey Shore

Thanks to all for some great advice. I see a big reason for auto iso is changing light conditions.
I don't shoot that much in those conditions but I'll explore auto when I do. I want to try to get humming bird photos this summer and they go in and out of sun and shade in the trees and auto iso would be perfect for that as my shutter would be fixed for depth of field and speed is fixed to catch them is a short shutter and the third leg of the triangle would be to float the ISO. I'll experiment with my camera to see how high to set the upper limit to keep noise exceptable.
Thanks for the help

mikeroetex Loc: Lafayette, LA

Neither of you are wrong, but that doesn’t automatically make you correct. My impression is that you are both arrogant snobs who feel your technique is the only right way to achieve a desired result.
If all I ever shot was landscapes and portraits in non-fluid lighting situations, I’d have no need for auto-ISO.

However, I didn’t pay thousands of $$ in modern cameras to make a poor shot, wasting my time because I was too slow to roll the SS or f-stop wheel.

As long as you are down on Auto-ISO, what’s your next gripe? People who use autofocus or don’t use a handheld light meter?

BebuLamar

I don't need anything fast but I do have to spend thousands of dollars for my camera because if I want the camera without the auto ISO feature I would have to spend thousands more.
People tend to say if you buy a camera with a lot of automation and you don't use them you waste your money but if you insist on buying camera without the automation you would have to pay more.

Sidwalkastronomy Loc: New Jersey Shore

Do many use hand held meters now with the many exposure choices inside these new cameras. I have many squares to pick and multiple patterns so I don't see how a hand meter could beat that.

BebuLamar

I have 3 good meters but even in the old days I rarely bring them with me when I go out and shoot. Even when I used a camera without the meter I still not likely to bring a meter with me. However, the meters are valuable for me. In fact they help me learn how to set exposure when I don't have any meter.
Also there is no meter built in the camera that can take incident reading.

Grey Ghost

This is a simple and straightforward explanation of the reason and benefit of using auto iso. I use it almost always and love it. Auto iso has allowed me to enjoy my photography even more. I also use Fuji and shoot jpeg 100% of the time. Having more fun shooting instead of spending all that time post processing.

Picture Taker Loc: Michigan Thumb

We all shoot different and the modern camera can handle us. The situations keep coming up and that is part of the challenge of photography.

par4fore Loc: Bay Shore N.Y.

When shutter speed and f stop are paramount auto ISO is the choice.

larryepage Loc: North Texas area

I occasionally use a handheld Pentax Spotmeter V that I've had for a long time. My experience is that the in-camera spot metering covers too big an area to be truly useful. Otherwise, the meters in my current cameras are at least as good (read that as accurate and usable) as anything handheld. I also still have a Minolta meter with an incident light dome, but rarely pull it out.

BobHartung Loc: Bettendorf, IA

IMHO auto-iso is primarily used in situations where there is expected to be motion (as in a bobbing Zodiac along the Antarctic Peninsula) and want to insure a fast enough shutter to avoid motion blur.

DirtFarmer Loc: Escaped from the NYC area, back to MA

I don't use auto ISO. I pick the ISO to fit the situation. If the ISO gets too high I get noise to an extent that it's hard to mitigate.

I don't use low ISO usually. When I first got a DSLR that had good low light performance I did some experiments to find out where the noise got to be a minimal problem. For my D3 it was about 800. I did not see any appreciable difference when I ran the ISO down to 100, and it sometimes limited the shutter speed I could use. So I used 800 for many things. But I do a lot of photos in poor light, so in my experiments I also tried to find out where the noise got to be more of a problem than I could easily mitigate. For the D3 that was around 10,000. When I got a D4 it was 16,000. D5 25,000.

So I estimate the best ISO to use in a particular situation. If I need a fast shutter I use a higher ISO. I'm usually using Aperture Priority to define the DOF the way I want it. If the light changes, I'll change the ISO. I do a lot of chimping so I can get a real-time check on my settings. When the light is changing I will err on the side of higher ISO.

jcboy3

No, it is shooting Manual mode with Auto ISO. The modes (Program, Aperture, Shutter, Manual) control the exposure (shutter speed and aperture). ISO settings are a separate thing, and you can set ISO or let the camera set it (Auto ISO) to get a proper image brightness.