Well in my boredom of the day I was trying to explain ISO to someone so I did this quick comaparo that I figured I would post on here. Forever I have been telling people about the power RAW and that my favorite thing about them is the ability to overexpose on purpose in order to lower noise levels in post. Anywho on to the boredom. Here's the first shot, looks decent for a 30D @ 3200. Over exposed by a stop and brought back in ACR + 25 noise reduction. 3200 and exposed right on the money (according to the meter ) did not really have to do anything in post except add the same +25 noise reduction. 3200 and underexposed and "recovered" with same + 25 NR Things were going good so I stepped it up a bit. ISO 3200 +1 stop and bumped the aperture to f4 from f2.8 and even better. Today's lesson was brought to you by the letter H.