- Although it's noisier, I experimented with an ISO of 6400 on my basketball shots tonight. I was very impressed at the quality of the shots for such a high ISO. We were in the home gym which has bright lights for a gym. Using an ISO this high I was able to use shutter speeds of 1/500 sec and 1/640 sec. This really helps in getting the stop action of the game. I also think it will help tremendously in the darker gyms. If you click on the image you'll see a larger version of the photo and will see what I mean by the noise level. What do you think?