I downloaded CHDK yesterday and did some tests with aperture override on my G9. Smallest out-of-factory aperture is F/8, with CHDK it is F/11. It does work fine, giving me greater depth-of-field which is useful in macro photography which I'm doing. What surprised me however, was that exposure times are not right. I'm in Av mode (aperture priority). Usually (without CHDK) the camera takes the right exposure times, but with CHDK it doesn't. Pictures are much too dark. Even with +2ev over exposure they are too dark. What is causing this, and how can I correct for it?
Greetings, Koen van Dijken
Edit: working with max. zoom, raw, ISO 80.