Hi,
By shutter time range, I mean the shutter speeds, currently from 15 to 1/2,000 seconds. These are what I would like see expanded to 64 to 1/10,000 seconds, as CHDKplus allows. (When the mode selector wheel is set to Tv I can scan through the range of shutter speeds by using the left and right rockers on either side of the function button.) When I do this using CHDKplus I see values from 64 to 1/10,000 seconds (not 15 to 1/2,000 seconds as the unscripted camera allows) . Using CHDKplus, the camera's exif info registers everything slower than 15 seconds as 15 seconds, and everything faster than 1/2,000 seconds as 1/2,000 seconds; but the reality is quite different. CHDK plus clearly increases the cameras fastest shutter speed to considerably greater than 1/2,000 (on the fast end), and to much much longer than 15 seconds (on the slow end). The 64 seconds is probably 64 seconds. I have no way of measure if CHDKplus' entry of 1/10,000 seconds is accurate, or not.
Thanks for the explanation of how the camera chooses settings.
I find that when I set the CHDK Av to 4.0, and iso to 60, the camera's exif says 4.0 and 64. I'm pretty sure that the camera will accept iso values below 80. I have tried every Av entry from 10 to 80; and the ones 60 and below are darker than the camera's own setting of 80. what the lowest iso is, I really don't know; but I suspect 64 may be it.
The 'glitch', as I call it, happens when I want to view previous shots, while in CHDKplus. With the a590, viewing previous shots requires throwing a switch on the camera, which is there just for that purpose. That works fine, but I can only view the last image. When I try to view ones further back (which requires using the rocker to the left of the function button) I get kicked out of the review mode, and back into shooting mode. (If I want to take more picture, I can just continue with the switch in the review position.) Only when I'm out of CHDKplus and turn the camera of and on, does the review switch behave normally. Odd, but that's what it does. It's not a big deal though, because I can exit, and enter, CHDKplus by hitting the Alt button. I'm sorry if this sounds confusing. I've learned to work around this 'glitch'. I don't know of a better way to explain it.
Yes, a script that would allow me to access shutter speeds, longer, and faster, than what I presently can, would be great. If it could be made to work using the left and right rockers on either side of the camera's function button, the way that CHDKplus currently works (and as the camera normally works), would be nice.
Thanks again for your help.
...... john
