ISO fixed 80 if exposure over 1 second (S100 and others?)

Effeegee

4

« on: 04 / September / 2013, 10:54:40 »

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I've begun exploring CHDK on my S100 (1.02a) both new to me. Canon fix ISO to 80 with exposures over 1 second - thwarting some uses e.g. low light intervalometer. My efforts to locate a solution or to use CHDK parameters to overcome this limitation have failed so far.

Is it possible? If yes, please can someone give me a pointer. If not, is it likely that CHDK developments will overcome this problem? I understand that it is a generic problem with models using the new CMOS sensor. IS this correct?

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reyalp

14079

Re: ISO fixed 80 if exposure over 1 second (S100 and others?)

« Reply #1 on: 04 / September / 2013, 12:52:29 »

It should be possible to override this using the ISO override option in the menu, or one of the ISO override functions in script. If it doesn't work, it may be a problem with that particular port.

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Don't forget what the H stands for.

nafraf

1308

Re: ISO fixed 80 if exposure over 1 second (S100 and others?)

« Reply #2 on: 04 / September / 2013, 13:48:17 »

Similar question posted to S100 porting thread, and instructions for test.
http://chdk.setepontos.com/index.php?topic=7887.msg87707#msg87707

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Effeegee

4

Re: ISO fixed 80 if exposure over 1 second (S100 and others?)

« Reply #3 on: 05 / September / 2013, 20:03:35 »

Thanks I seem to be on the right track now. My unfamiliarity with the CHDK OSD and settings led me to think I was not getting an override of the ISO. Now I have to come to terms with using it.

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