Setting aperture value on low-end compacts + manual zoom - Hello, I'm a NEWBIE - HELP!! (Newbies assistance, User Guides and thank you notes) - CHDK Forum
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Setting aperture value on low-end compacts + manual zoom

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Offline vihar1

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Setting aperture value on low-end compacts + manual zoom
« on: 13 / August / 2008, 08:19:14 »
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I have an A460 and would like to change aperture values.

Can I do it with CHDK? If not, or not possible on such cameras is there a way to trick it somehow? I have read about certain ND but I do not really know what it is.

Is there a way to set focus manually?
« Last Edit: 13 / August / 2008, 08:29:34 by vihar1 »
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Offline PhyrePhoX

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Re: Setting aperture value on low-end compacts + manual zoom
« Reply #1 on: 13 / August / 2008, 08:32:08 »
you can both set aperture and focus manually on the a460.
an ND filter is only built into the smaller cameras such as the ixus series, so don't worry about that.
you can change aperture/focus both via script or via CHDK configuration directly.
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Offline vihar1

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Re: Setting aperture value on low-end compacts + manual zoom
« Reply #2 on: 13 / August / 2008, 08:42:03 »
What I found in CHDK menus is Ev and bracketing and so on but I did not find Av override settings. I use Allbest's latest release. Maybe I wasn't attentive enough?

Can anyone tell me how can I use the mentioned features?
« Last Edit: 13 / August / 2008, 08:47:54 by vihar1 »
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Offline Microfunguy

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Re: Setting aperture value on low-end compacts + manual zoom
« Reply #3 on: 13 / August / 2008, 08:47:55 »
Quote from: vihar1 on 13 / August / 2008, 08:42:03
I did not find Av override settings.

that is not in the menus because the A460 does not have an aperture.

You can force the ND filter in/out but that only affects exposure, not depth-of-field.

You do not have any control of depth-of-field on IXUS cameras.


David
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Offline Hacki

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Re: Setting aperture value on low-end compacts + manual zoom
« Reply #4 on: 13 / August / 2008, 08:51:44 »
Quote from: Microfunguy on 13 / August / 2008, 08:47:55
that is not in the menus because the A460 does not have an aperture.

You do not have any control of depth-of-field on IXUS cameras.

The A460 is not of the Ixus series.

The aperture override should be in the "Extra Photo Operations" menu, and its called "Override Aperture Value"





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Offline vihar1

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Re: Setting aperture value on low-end compacts + manual zoom
« Reply #5 on: 13 / August / 2008, 08:53:14 »
Quote from: Hacki on 13 / August / 2008, 08:51:44

The aperture override should be in the "Extra Photo Operations" menu, and its called "Override Aperture Value"


But it isn't :( I have to check at home tonight but I am poretty sure about it.
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Offline Microfunguy

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Re: Setting aperture value on low-end compacts + manual zoom
« Reply #6 on: 13 / August / 2008, 08:54:39 »
Quote from: Hacki on 13 / August / 2008, 08:51:44
The A460 is not of the Ixus series.

I did not say that it was  :)

Quote

The aperture override should be in the "Extra Photo Operations" menu, and its called "Override Aperture Value"

No, because it does not have an aperture.

I have two A460's.







[/quote]
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Offline vihar1

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Re: Setting aperture value on low-end compacts + manual zoom
« Reply #7 on: 13 / August / 2008, 09:30:47 »
Quote from: Hacki on 13 / August / 2008, 08:51:44
The A460 is not of the Ixus series.

I did not say that it was  :)

I wanted to reply to a previous post, sorry :)

Quote
The aperture override should be in the "Extra Photo Operations" menu, and its called "Override Aperture Value"

No, because it does not have an aperture.

I have two A460's.


What do you mean it does not have have an aperture? Don't all the cameras have it? Or do you mean we can't set it manually? (see http://www.wrotniak.net/photo/snap/a460-rev.html, it mentions aperture as well)
« Last Edit: 13 / August / 2008, 09:35:40 by vihar1 »
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Offline Microfunguy

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Re: Setting aperture value on low-end compacts + manual zoom
« Reply #8 on: 13 / August / 2008, 10:18:09 »
Quote from: vihar1 on 13 / August / 2008, 09:30:47
What do you mean it does not have have an aperture? Don't all the cameras have it?

No.
None of the IXUS have an aperture, nor the A450,A460,A530,A550 or A560


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do you mean we can't set it manually? (see http://www.wrotniak.net/photo/snap/a460-rev.html, it mentions aperture as well)

That link actually says "For example, at the widest angle it will use either F/2.8 or F/8, and nothing in-between.

This indicates that the camera does not have an iris diaphragm, but just a swinging plate with a single opening"

He is not quite correct.

There is no swinging plate with a hole, just a 8x ND filter that swings in or out.

For optical reasons, the effective aperture of the lens changes as you zoom from wide-angle to telephoto, but that has nothing to do with an iris diaphragm.
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Offline vihar1

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Re: Setting aperture value on low-end compacts + manual zoom
« Reply #9 on: 13 / August / 2008, 11:30:54 »
Thank you for all the answers but I have one more.

What is ND manipulating good for? What does it do?
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