High ISO NR(User’s Manual: D300S page 259; D300 page 263)High ISO NR (High ISO Noise Reduction) lessens the effectsof visual digital noise in your images when you use ISOsensitivity (exposure gain) settings above ISO 800.Have you ever tried to watch TV while children are playing inthe same room? The louder you turn the TV, the louder thekids get, it seems. However loud the volume of the TV, thechildren laughing and running around degrade the pure TVsound you desire. There is a high child-to-TV noise ratio thatinterferes with your enjoyment of the program you arewatching. After a while, you figure out that there is a pointwhen you simply have to ask the kids to leave the room.Turning up the TV just makes them get louder and louder toovercome the TV sound.204
