Which ISO speed

[HoboSyke]

HI all. Just a question regarding ISO speed and action photography.

If its bright and sunny and im shooting some sports photography what ISO would I pref use? Shooting on a 20D ? Using burst mode (5 frames a second) ?

I shot the last ones on ISO 200. Could I use ISO 100 for those? Being bright and sunny ect? :greenpbl:

 

[ksmattfish]

As long as you have enough light to get the shutter speed you need with the aperture you've chosen there is no reason why not. In bright sun a good exposure for ISO 100 at f/8 is going to be around 1/400th to 1/800th of a second.

I can't even tell the difference between ISO 100 and 200 on the 20D. The only reason I ever use ISO 100 is to get less DOF or a slower shutter speed.

 

[Artemis]

Id say 200 - 400, just incase, but to be honest Matt above is perfectly right, ISO is made for every single different situation, and can not be applied before hand...

 

[DocFrankenstein]

ISO 100 does give you extra 2-3 values in shadows when you process raw.

Use whatever gives you high enough shutter speed.