iso

iso5000

iso 800

iso400

iso 50

flash

Well ISO is really helps you to take good pictures in the dark and you could get the persons face clearly. The more ISO you put in it the more you light that you get in the picture. Well in the ISO 50 has less light so the picture is dark. Well I think ISO is better then flash because the flash focus more on the person but the ISO lets you see everything else. You have to be careful by not moving and so the picture could come out clearly.