ISO 3200 and Spot Metering on your Canon 400D
Yesterday, while looking for a way to do Time Lapse with a Canon 400D I came across CHDK where a bunch of guys hacked away some cool stuff “that you can load onto your camera’s memory card to give your camera greatly enhanced capabilities”. Unfortunately CHDK software is targeted at PowerShot series, so there’s no official software available for the EOS 400D. However, thanks to the knowledge generated by the community, a hack was created for the 400D that gives you access to ISO 3200 and Spot metering amongst other things.
How cool is that!
I tried it and it works flawlessly.
It’s all explained on this forum or this one. There’s even a side by side comparison of the 3200 ISO between the 400D and the 40D.

