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Shutter and ISO Limit vs Override

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Offline enricong

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Shutter and ISO Limit vs Override
« on: 13 / December / 2012, 15:04:29 »
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Rather than an override, I'd like to be able to set a limit.  Is this possible?

I can override the shutter speed to 1/30 and every photo will be taken at 1/30.  Or I can set the ISO override to 200 and every photo will be taken at ISO 200.

However, if the camera wants to take a photo at a faster shutter speed, I would prefer it be allowed to.  I can manually disable the override, but sometimes I am taking photos and action situations.

So I'd like the camera to figure out what settings it wants to use, then if it wants to use a shutter speed that is slower than 1/30, I want it overridden.  However if the camera wants to use a faster speed, I'd like to allow that speed.
« Last Edit: 13 / December / 2012, 15:06:56 by enricong »
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Offline waterwingz

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Re: Shutter and ISO Limit vs Override
« Reply #1 on: 13 / December / 2012, 17:39:23 »
Quote from: enricong on 13 / December / 2012, 15:04:29
Rather than an override, I'd like to be able to set a limit.  Is this possible?
I think that I have both good new and bad news for you.

First the good news.

If you look at the Custom Auto ISO menu,  there seems to be enough setting to allow you to do what you want.

Now the bad news.

I don't believe I've seen any documentation on how the Custom Auto ISO function actually works.  These posts by tsvstar explain some if it :

http://chdk.setepontos.com/index.php?topic=7284.0
http://chdk.setepontos.com/index.php?topic=8467

But you would probably really need to read the code to chart out all the interactions.   And should you do so, the CHDK community would be grateful if you could produce a clear summary of what you learned.
« Last Edit: 13 / December / 2012, 17:57:53 by waterwingz »
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