Set Max ISO on 5DII and 5DIII

I'm expereimenting with shooting in AV mode (heretofore strictly a M shooter) & would like to know, is there a way to set a limit for ISO on both the MKII & MKIII? Is there already a default max ISO on both or either in AV?

You would need to set the ISO to Auto, which can be done in any of the top dial shooting modes. I have a 5DIII and personally avoid going over 12,800.

Go into the settings, you can set all that in the "ISO speed range", not sure if its available on the mark ii though

Found it on the MKIII but not the MKII

Just curious why you are sooting auto iso in av mode?

I just downloaded the manual to the mkII. It looks like Auto ISO will use a range of 100-3200 in greenbox, CA, P, Tv, and Av mode. I don't see anything about limiting the range like the mkIII can so.

gonzogolf wrote in post #16711626
Just curious why you are sooting auto iso in av mode?

I have also start experimenting with Av lately. Auto ISO is definitely the best way to go.

I have Av, min ss set and +1 and 2/3 EC dial in.

It's almost bullet proof.

kin2son wrote in post #16711642
I have also start experimenting with Av lately. Auto ISO is definitely the best way to go.

I have Av, min ss set and +1 and 2/3 EC dial in.

It's almost bullet proof.

And thats better than a fixed iso how? You are surrenering control of both SS and ISO, why not fix the ISO and only have one wildcard?

Auto ISO is definitely the best way to go because sometimes the shutter speed needs more room to play with and a fixed ISO means it cant always meet the metering demand (ESPECIALLY if you need a +1 compensation without having the shutter speed go too slow, like 1/10 or slower is completely useless sometimes when im handholding and shooting people).

on the mark iii you can set minimum and maximums for iso and ss, so it's quite bulletproof indeed. If you shoot models like I do they are constantly moving and the shutter speed needs to be faster sometimes to freeze motion/blur and having a set ISO can prevent that when the light drops

We do this on the mark iii because the noise is SO clean at 1600 and 3200 that even if the processor needs to choose that high of an ISO to retain a fast shutter speed, its perfectly okay to do so. It's quite relieving to be able to trust the camera in this sense

edit: if you are shooting landscape or something that doesnt really need high shutter speed then you totally dont need auto iso, but if you shoot models/people professionally you dont have time to fiddle with the iso every other shot

thedcmule2 wrote in post #16711667
on the mark iii you can set minimum and maximums for iso and ss, so it's quite bulletproof indeed.

I just wish I could set the min SS higher than 1/250. I like to shoot at 1/500 for freezing action.

gonzogolf wrote in post #16711650
And thats better than a fixed iso how? You are surrenering control of both SS and ISO, why not fix the ISO and only have one wildcard?

How is it a wildcard? If you know how to read and set your metering you can get very accurate results using auto ISO and Av. Using MF glass I frequently use Av and auto ISO, I'd say 80% of the time. It's convenient and accurate, the most I ever feel the need to adjust in post is plus or minus .20 for exposure in LR. I find that Auto ISO is implemented much better in Av than it is in M since you can also control your exposure compensation, which you can't do in M mode on anything but the 1DX.

gonzogolf wrote in post #16711650
And thats better than a fixed iso how? You are surrenering control of both SS and ISO, why not fix the ISO and only have one wildcard?

Because the camera will always pick the lowest ISO required with auto ISO.

Why fix the ISO for unnecessary noise/risk of not meeting your min shutter speed?

EverydayGetaway wrote in post #16711750
How is it a wildcard? If you know how to read and set your metering you can get very accurate results using auto ISO and Av. Using MF glass I frequently use Av and auto ISO, I'd say 80% of the time. It's convenient and accurate, the most I ever feel the need to adjust in post is plus or minus .20 for exposure in LR. I find that Auto ISO is implemented much better in Av than it is in M since you can also control your exposure compensation, which you can't do in M mode on anything but the 1DX.

Its a wildcard, perhaps you are more comfortable with word variable, but the camera is picking two of the 3 variables of the exposure triangle.

gonzogolf wrote in post #16711785
Its a wildcard, perhaps you are more comfortable with word variable, but the camera is picking two of the 3 variables of the exposure triangle.

Not really, it's picking them with your approval. If you don't like the settings it's showing, you simply dial in exposure compensation, which even that I rarely have to do.

EverydayGetaway wrote in post #16711750
How is it a wildcard? If you know how to read and set your metering you can get very accurate results using auto ISO and Av. Using MF glass I frequently use Av and auto ISO, I'd say 80% of the time. It's convenient and accurate, the most I ever feel the need to adjust in post is plus or minus .20 for exposure in LR. I find that Auto ISO is implemented much better in Av than it is in M since you can also control your exposure compensation, which you can't do in M mode on anything but the 1DX.

You can simulate M with EC and auto-ISO on some of the newer cameras, if your desired Av value is wide-open, by:

1. Setting the camera to Tv-priority
   
2. Setting the camera to the highest ISO you're willing to use
   
3. Setting the custom function for exposure safety shift with ISO