Took a couple of 'grab' shots while on two walks in the park. Decided to try high ISO on my Pentax just to see the results. Had no tripod, so had no choice, in any event. The reflection is shot about ISO 400, if I remember correctly; the other image is just a point and shoot at about 1600 ISO, F4, and the camera would not focus electronically, so I had to quickly switch to manual. My poor eyes! Hard to tell where the focus is. I don't think I will be using high ISO too often, except for a certain look.