Would it be possible to somehow override the ISO of a Canon G9 to 3200. Although the ISO control only goes to 1600 there is a special SCN mode of ISO 3200. If I use the override in CHDK the G9 seems to be pegged at 1600 i.e. I don't see a corresponding adjustment to shutter speed from a value of ISO 1600.
Using the SCN mode ISO 3200 mode produces a RAW that consist of a partial frame with 3 reduced images of different colours.
Not too terribly important but I just wanted to try some astrophotography stacking at ISO 3200 vs 1600.
By the way sub ISO 80 overrides seem to work ok at least shutter times adjust according but I have never tried any real shots at those values.
