Yesterday I was curious about my Canon 400 D metering, when I was browsing I found an interesting stuff, 400 D hack to get custom ISO from 80 to 3200 and spot metering. I was thinking, it it will broke my camera ?After long read and googling, this hack will not harm to my camera, the hack will only work on certain CF card that we custom it.

I use step that mention on CHDK 400 D wiki I did the step by step carefully and It work :)

Here My 400D screen shoot with ISO 3200 and spot metering