A470 Porting - page 25 - DryOS Development - CHDK Forum
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A470 Porting

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Offline dcollier

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Re: A470 Porting
« Reply #240 on: 02 / September / 2009, 19:01:26 »
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 It seems that the Dark Frame Subtraction setting is ignored (101b).  I saw other cameras had that problem.  Can anyone else confirm?
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Offline cjdshaw

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Re: A470 Porting
« Reply #241 on: 14 / September / 2009, 20:34:59 »
When you override the ND filter to IN, the f stop stored in the file reads 3.0 (depending on the focal length) not 9.0
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Offline iceman

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Re: A470 Porting
« Reply #242 on: 19 / September / 2009, 04:51:27 »
Not correctly works "Override shutter speed" (102c). It is impossible to expose value more than 100. If to put "Value Factor" 100 and "Override shutter speed" 100 on the basic screen value 10000 is shown, but removes all the same 100 seconds a maximum. It is possible to correct it?
« Last Edit: 19 / September / 2009, 04:53:07 by iceman »
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Offline fe50

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Re: A470 Porting
« Reply #243 on: 19 / September / 2009, 06:51:39 »
Hello & welcome, iceman !
Quote from: iceman on 19 / September / 2009, 04:51:27
Not correctly works "Override shutter speed" (102c). It is impossible to expose value more than 100. If to put "Value Factor" 100 and "Override shutter speed" 100 on the basic screen value 10000 is shown, but removes all the same 100 seconds a maximum. It is possible to correct it?

100x100 = 10'000 seconds = ~166,67 minutes = ~2.78 hours exposure time - not possible on the A470, also such a long exposure time doesn't make sense.

The A470 CHDK version is limited to 64s exposure time (e.g. shutter speed [1] x value factor [64] ).
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Offline iceman

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Re: A470 Porting
« Reply #244 on: 21 / September / 2009, 03:29:34 »
Quote from: fe50 on 19 / September / 2009, 06:51:39
The A470 CHDK version is limited to 64s exposure time (e.g. shutter speed [1] x value factor [64] ).
Probably to remove this restriction? 2,78 hours certainly do not matter, and here at least 5 minutes very much even are necessary.
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Offline reyalp

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Re: A470 Porting
« Reply #245 on: 21 / September / 2009, 03:45:31 »
Quote from: iceman on 21 / September / 2009, 03:29:34
Probably to remove this restriction? 2,78 hours certainly do not matter, and here at least 5 minutes very much even are necessary.
This can be done, but it takes some work. See http://chdk.setepontos.com/index.php/topic,3461.0.html
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Offline scriptors

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Re: A470 Porting
« Reply #246 on: 23 / September / 2009, 03:37:12 »
If it's possible ...

i have more problem with autofocus on 'super macro' shot, it's possible to have one manual focus sistem ?

i not understand more about override focus 'distance'

thanks
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Offline dodald

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Re: A470 Porting
« Reply #247 on: 07 / December / 2010, 21:15:22 »
Sorry to resurrect an old thread, but can anyone tell me whether the A470 (101b) supports two partitions?

I have a 16gb SDHC card I'm trying to get auto-boot working on and the camera will not recognize the "large" partition.  (It will boot CHDK, but only from the "small" partition.

(I'm pretty sure I'm following all the instructions correctly, but I figured I ask so I don't continue to bang my head against the wall!)

For now, I'm manually starting CHDK using the "Update Firmware" option.
« Last Edit: 07 / December / 2010, 21:24:29 by dodald »
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Offline pixeldoc2000

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Re: A470 Porting
« Reply #248 on: 08 / December / 2010, 12:11:43 »
Quote from: dodald on 07 / December / 2010, 21:15:22
I have a 16gb SDHC card I'm trying to get auto-boot working on and the camera will not recognize the "large" partition.  (It will boot CHDK, but only from the "small" partition.
The purpose of the first smaller partition is to be able to auto-start chdk (canon firmware can only access smaller partition on boot be able to auto-start chdk). After chdk has startet it "hides" the first partition to fool canon firmware to use the second partition (store your images/movies there).
Its correct behavior chdk auto-boot only works if chdk files are on first partion.

Read http://chdk.wikia.com/wiki/Bootable_SD_card for more info.
« Last Edit: 08 / December / 2010, 12:29:34 by pixeldoc2000 »
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Offline whim

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Re: A470 Porting
« Reply #249 on: 08 / December / 2010, 13:59:50 »
Quote
Its correct behavior chdk auto-boot only works if chdk files are on first partion.

agreed in principle - but 'chdk files' appears rather subject to misunderstanding, so here's my attempt
to describe how I set my cards up (SDMINSTE.EXE helps Windows users to swap partitions)

Quote
+--------------+-------------------------------------------------------------+
| DISKBOOT.BIN |  PS.FIR or PS.FI2                                           |
|              |                       /CHDK      /DCIM                      |
| SDMINSTE.EXE |  SDMINSTE.EXE                                               |
+--------------+-------------------------------------------------------------+
<--FAT (12/16)-><-------------------------- FAT32 --------------------------->
    (bootable)

hope that helps,

wim
« Last Edit: 08 / December / 2010, 14:01:22 by whim »
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