What are the advantages of using 1/3 stops in ISO for example in 60d over 600d?
Thanks!
It all depends on how they are obtained.
Canon cameras have two kind of ISO:
- "Native ISOs" (or Full stops)
- "Digital ISOs" (1/3 or 1/2 stop)
Digital ISOs are obtained from Native ISOs by applying a positive (-> more noise) or negative ( -> clipping) gain. IIRC this happens before saving the picture into .CR2 or .JPG
A1ex definitely knows more than me on this subject though.
An interesting read that should help you decide what ISO value is good for you: http://magiclantern.wikia.com/wiki/ISO
So the best thing to do is to use full stops right?... ;)
In photo mode, yes
In video mode you should prefer ML ISOs
Ok Thank you. but for example in Canon EOS 60d if i choose the iso to 160 is it digitally gained?
Yes, ISO 160 is achieved with digital gain. In this case it will be negative digital gain. The base ISO would be 200 and ML will apply a negative gain of -0.3EV to achieve ISO 160.