A550 Porting... - page 10 - General Discussion and Assistance - CHDK Forum
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A550 Porting...

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Offline muttley

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    • A550 Porting
Re: A550 Porting...
« Reply #90 on: 20 / March / 2008, 11:07:28 »
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Quote from: ynaig on 18 / March / 2008, 20:27:14
f2.6 -> 277
f3.2 -> 308
f3.5 -> 336
f4.0 -> 388
f5.0 -> 439
f5.5 -> 480

good work Ynaig!  :)

well, p.c. #23 is ApertureSize

there is the current configuration for a550 (platform/a550/shooting.c) below:

Code: [Select]
const ApertureSize aperture_sizes_table[] = {

    {  8, 273, "2.6" },
    {  9, 288, "2.8" },
    { 10, 320, "3.2" },
    { 11, 352, "3.5" },
    { 12, 384, "4.0" },
    { 13, 416, "4.5" },
    { 14, 448, "5.0" },
    { 15, 480, "5.6" },
    { 16, 512, "6.3" },
    { 17, 544, "7.1" },
    { 18, 576, "8.0" },
};
it's seem all wrong  ??? ...and it's smaller set :blink:

now i don't have time for see better your result, sorry!!  :-[

thanks!
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Offline synthesilica

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Re: A550 Porting...
« Reply #91 on: 14 / April / 2008, 17:01:57 »
Hey there, been a while. I just remembered I haven't tested shutter speed. I decided to try chasing my monitor's scanlines.

Image on the right is at 1/2000, the specified limit and the image on the left is maxed out by CHDK


The real maximum shutter speed looks close to 1/4000 or 1/6000!! Canon never meant for their camera to be used this fast so be careful, forcing it that fast too often will probably break your shutter! I'll do tests again later to try and narrow it down.
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Offline Barney Fife

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Re: A550 Porting...
« Reply #92 on: 14 / April / 2008, 17:59:05 »
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« Last Edit: 22 / April / 2008, 17:46:08 by Barney Fife »
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Offline waterwingz

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Re: A550 Porting...
« Reply #93 on: 08 / February / 2014, 12:30:13 »
If you are the owner of an A550 we need your help improving the manual focus / subject distance override capability of CHDK.

Please read the instructions posted here < Link to Testing Instructions > and test your camera.

TIA.
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Offline nafraf

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Re: A550 Porting...
« Reply #94 on: 15 / December / 2014, 19:42:46 »
a550 patch: simpler loader code, remove autodetected entries from stubs_entry_2.S and stubs_min.S
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Offline koshy

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Re: A550 Porting...
« Reply #95 on: 15 / December / 2014, 20:51:07 »
Quote from: nafraf on 15 / December / 2014, 19:42:46
a550 patch: simpler loader code, remove autodetected entries from stubs_entry_2.S and stubs_min.S
Generally it works but you still cannot power on A550 using power button. Only via play button, but that was the case prior to this patch, too. So I guess the patch is fine.

We worked on the power on failure for this and three other cams elsewhere and did not get into finding the required information by trial and error as suggested here:
Quote from: srsa_4c on 20 / July / 2014, 16:58:36
Unfortunately, (to my knowledge) none of the Vx ports implement special support for boot-time mode detection. That means someone would have to find it (mostly trial & error), as it is different from the method used in DryOS cameras. Doing this without physical access to the cam would be very painful and slow...
« Last Edit: 15 / December / 2014, 21:00:54 by koshy »
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Koshy had a little ELPH which wasn't white as snow but everywhere that Koshy went the ELPH was sure to go. (actually an SD, but that detail ruins the rhyme...)
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