Anyone use AUTO ISO

I sometimes use Auto ISO for Birds in Flight, setting the shutter and aperture manually.

Is it me? Probably. The intervening years have probably messed with my memory.

You see, I can't help feeling that the ISO setting on my 7D doesn't replicate the old film speeds, usually being less sensitive than I remember. As an example, I remember thinking ISO400 was about as fast as I ever needed to go. I remember using ISO800 just once and, when I did, it seemed like I could shoot in the dark. Using ISO800 on the 7D doesn't seem all that fast.

Is it me?

I would if it worked in M mode like the 7D. (I have 5D2)

If I use it in Tv mode, the camera will often choose to stop down rather than use a lower ISO which is rarely what I'd want.

I love auto ISO. But its too bad my 50D limits it to 1600.

Steve of Cornubia wrote in post #11914340
Is it me? Probably. The intervening years have probably messed with my memory.

You see, I can't help feeling that the ISO setting on my 7D doesn't replicate the old film speeds, usually being less sensitive than I remember. As an example, I remember thinking ISO400 was about as fast as I ever needed to go. I remember using ISO800 just once and, when I did, it seemed like I could shoot in the dark. Using ISO800 on the 7D doesn't seem all that fast.

Is it me?

It's just you.

You probably were not attempting things that are now possible with digital relative to low light.

vk2gwk wrote in post #11913470
With the 5D2 and sufficient light you can go to ISO 3200 or even 6400 without getting so much noise that you cannot get rid of it in PhotoShop ARC.

+1 use it most of the time, the ISO latitude of the 5dm2 works well with auto iso.

I used it when I first got my T2i, but turned it off after a week.

I find figuring out the "correct" ISO the easiest thing.

muusers wrote in post #11914389
I love auto ISO. But its too bad my 50D limits it to 1600.

My 50D goes to ISO 3200 ...

I use it almost all the time! Why not let the camera do some work. I adjust if I feel it's nesassary, but belive it or not, a 1500.00 camera does a pretty good job. If your my age, you kind of think of ISO as film speed!!

I use it in Manual on my 7D. I wish i could set exposure compensation and that auto iso would go to 6400. Why can't we have these things?

vk2gwk wrote in post #11913470
I use AUTO ISO when shooting "fast action" (like flying birds, sports and the like) where I need sufficient depth of field and a fast shutter speed (like 1/1000). With the 5D2 and sufficient light you can go to ISO 3200 or even 6400 without getting so much noise that you cannot get rid of it in PhotoShop ARC.

Invertalon wrote in post #11913757
I have mentioned this a few times already, but I really wish we had an option to use exposure compensation in manual, when ISO is set to "auto".

I enjoy shooting manual with auto ISO, but it sucks we can't set EC like we can in other modes... I generally like to add +1/3 or +2/3 to expose to the right generally, but in manual it will balance out the ISO only to "0" with whatever metering mode you select.

They need to add a Tv/Av priority mode, with auto ISO that allows EC!

JeffreyG wrote in post #11914093
I use auto ISO on the 1D Mark IV in any situation where I would previously have used Av or Tv. This would be any situation with rapidly changing incident light conditions. Most commonly this would be a stage show or a day with broken clouds.

artyman wrote in post #11914335
I sometimes use Auto ISO for Birds in Flight, setting the shutter and aperture manually.

I agree with all the above. I use it in sports when I want a specific shutter speed and aperture.

I also agree on EC. I would love to be able to add 1/3 or 2/3 of a stop when using auto iso. Sometimes the camera simply meters it too low, specially when working with snow.

I don't know why anyone would want to use auto-ISO unless they had no understanding of how cameras work.

Well actually I do... Most people set ISO to 1/3rd stop increments, which makes changing it significantly take a lot of clicks. Therefore ISO becomes a chore and people give up and just use auto-ISO.

I started using full ISO stops about 6 months ago and so far I am loving it. Makes using the camera way easier.

Here is my process in a non-controlled environment and when without flash:

First I set my AV to what I want since that is usually most important.
Then I set my shutter speed to slightly faster than what I really want.
Then I do a quick exposure check against something in the environment that is close to 18% gray and in the lighting that most of my subjects should be in.
Then I raise my ISO (In full stops) until exposure is close to balanced.
Then since I like my exposure a tad to the right I lower my shutter speed 1/3rd or 2/3rd stops.

If during this process I am not happy with my resulting ISO setting (usually 3200 on 5d2, 800 on 7d), I may try and lower my AV and my shutter speed even more to get back to balanced exposure.

After that while taking shots in that environment I check my exposure if at all possible before each shot and adjust shutter speed to get the right exposure if I need to. If I don't have time to adjust the shutter speed though it is usually alright because 1/3rd or 2/3rds under or over isn't too bad when you have ISO under your control.

I find that auto-ISO works well when I'm taking action shots....such as soccer....and it is partly cloudy....tough to have a constant ISO when the light conditions keep changing.

Other than that, it's manual ISO all of the time for me.

I've recently switched to Auto ISO after years of shooting non-auto ISO...I just felt like I couldn't possibly give up control and "let the camera decide for me". Hell, I might as well put it green box mode, right!

Well, it does a pretty dang good job of doing it and like mentioned above, is one less thing to worry about in changing light conditions when I'm more concerned about shutter speed and aperture.

Use it a lot for action, love it!

Auto ISO