Gear Talk > Technical Support

functional ISO

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pete22230:
I have a 30D and I find that my "functional" ISO maxes out at around 400 and sometimes even less depending on the shot / subject.  I'd love to (plan to) move up to a current generation body but am a bit confused regarding the "functional" ISO capabilities.  I know the current cameras have incredibly high ISO capabilities but how high can they truly be routinely used in ambient  and low ambient light before grain becomes an issue.  Since all my lenses are full frame I'd love to go the 5DIII route ($$$$) but might also consider a 7D (mkII ?).  Love to hear any opinions on capability vs. reality.  Cheers

Chris Geiger:
With the 5D3 I am really happy with ISO 6400 and can use 12,800 for some images. Here are some examples at 6400...

x1n30:
With my 60D I find that as much as possible I prefer to stay below 800, though 1600 and maybe even 3200 would probably be useable for web (though DR at 3200 isn't too pretty). 6400 and 12800 are pretty much just for messing around and emergencies.

SteenerMe:
7D is only gonna get you to the 800iso range. Seeing you have the lenses a 5D is prob the way to go. Newer the version the better.

Waterdonkey:
5D III without a doubt.  I moved from the 30D to the 7D and was blown away with the detail but the noise was something to deal with and I guess that is what you are grappling with when you say "functional" ISO.  Now I have the 5Dm III and, well look, you can shoot well into 3200 iso and not have to edit too much to clean the little things.

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