Canon 5D MK III Auto ISO Query

mugsandb

mugsandb

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Andy
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I quite often shoot in TV and have recently started to use the Auto ISO option on my Canon 5D MK III. I have noticed that the camera consistently uses the lowest F stop but with an ISO to suit the shooting conditions. Is this the normal way for the camera to do things or am I able to get it to choose a higher F stop to give me more depth of field?
 
You can set the both the shutter speed range and/or the aperture range in the menu so just limit the maximum aperture to something that will be suitable for the depth of field that you're looking for.

Bob
 
Thanks Bob, I didn't know that.
 
Hi Bob, I've found the menu that will allow me to limit the shutter speed, but I can't find a limiter for the aperture. Do you know which menu it is under?
 
You will soon discover 5dIII auto ISO won't allow you to set exposure compensation so it is pretty much useless until (well, IF) we get a firmware update addressing this issue.
 
I have to apologise, it looks like the 5D3 is slightly behind the 1Dx in this respect although I think you might be able to achieve what you're aiming for by setting "Safety shift" to Tv/Av.

Bob
 
In what way does it give more control? The way I understand it, I'm in effect giving my camera permission to over write the shutter speed I have chosen to get the shot it thinks I want. Forgive me if I've misunderstood it.
 
Why dont you just put the camera in manual,pick your aperture and shutter speed to suit the occasion and let auto ISO do its thing.I do this with my 6D and it works fine
 
Thanks Michael, I had wondered if that would work. It just seemed too simple!
 
mugsandb said:
Thanks Michael, I had wondered if that would work. It just seemed too simple!
Click to expand...

...but the problem is that you can't set exposure compensation on the 5dIII and that rather limits your options.......I'm really surprised there wasn't a firmware update as there was with the 1 Dx....and the 7D2 has it from the outset.
 
Surely pressing the shutter half way and turning the jog wheel on the back of the camera will allow exposure compensation?
 
mugsandb said:
Surely pressing the shutter half way and turning the jog wheel on the back of the camera will allow exposure compensation?
Click to expand...

Feel free to discuss that with a Canon rep
 
My mistake, sorry. I had accidentally moved to AV instead of Manual.
 
Not only can you not dial in exposure compensation, but worse than this it also does not have AE lock when you press the shutter button half way with auto ISO in manual. This means even a small recomposure once the focus is locked can lead to wild inaccuracies in exposure. There is no logical reason Canon should have done this, and both issues could be easily fixed in firmware but they just don't seem bothered.......
 
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