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SOLVED - Av settings in Manual

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Offline donw

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SOLVED - Av settings in Manual
« on: 18 / September / 2014, 22:13:45 »
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I read where aperture values can be set from 1 to 16.
Override setting is set to no
How is that done?
When in manual, there is only 2.8/8.

« Last Edit: 19 / September / 2014, 15:12:30 by donw »

Re: Av settings in Manual
« Reply #1 on: 18 / September / 2014, 23:45:47 »
I read where aperture values can be set from 1 to 16.
Override setting is set to no
How is that done?
When in manual, there is only 2.8/8.
Would help if mentioned what camera you have?

But I'm guessing its one of the many Powershots that do not have a user adjustable aperture.  What you see is the choice between having a Neutral Density filter in the light path or not having it there.

Note that the f-stop values displayed will changed with zoom position.   The calculation of f-stop is a function of focal length as well as len opening diameter.
Ported :   A1200    SD940   G10    Powershot N    G16

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Offline donw

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Re: Av settings in Manual
« Reply #2 on: 19 / September / 2014, 08:07:12 »
SX20 IS

Re: Av settings in Manual
« Reply #3 on: 19 / September / 2014, 10:01:56 »
SX20 IS
Thanks - that helps.  The SX20 (of course) has a user adjustable aperture.

Were you not able to find or use the Override Aperture menu entry in the Enhanced Photo Operations menu ?

http://chdk.wikia.com/wiki/CHDK_1.2.0_User_Manual#Override_Aperture
Ported :   A1200    SD940   G10    Powershot N    G16


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Offline donw

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Re: Av settings in Manual
« Reply #4 on: 19 / September / 2014, 11:39:47 »
Thanking you for your help.
The histogram is in the way. Found it however.
So, once it is set to an F-stop, it stays put. It is no longer adjustable... right?

How would you bracket +/- 1/3 stops?

Re: Av settings in Manual
« Reply #5 on: 19 / September / 2014, 12:29:53 »

So, once it is set to an F-stop, it stays put. It is no longer adjustable... right?
Correct. The setting in the CHDK menu will override each shot until you disable it or disable overrides.
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How would you bracket +/- 1/3 stops?
Use either the CHDK built-in "bracketing in continuous mode" function or run a bracketing script.
http://chdk.wikia.com/wiki/CHDK_User_Manual#Bracketing_in_Continuous_Mode
http://chdk.wikia.com/wiki/User_Written_Scripts#Bracketing

« Last Edit: 19 / September / 2014, 18:27:34 by waterwingz »
Ported :   A1200    SD940   G10    Powershot N    G16

Re: Av settings in Manual
« Reply #6 on: 19 / September / 2014, 12:31:15 »
Note that the Canon firmware will not be aware that you have locked the aperture and may not set the correct exposure as a result
Ported :   A1200    SD940   G10    Powershot N    G16

 

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