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A590IS porting...

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Offline 73113

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  • Canon Powershot A590 IS
Re: A590IS porting...
« Reply #130 on: 23 / October / 2008, 06:27:41 »
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Should I try existing scripts like MD with this build?

edit: can't get optical zoom for video to work. (101b, zooms normally)
« Last Edit: 23 / October / 2008, 06:58:29 by 73113 »
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Offline gho

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Re: A590IS porting...
« Reply #131 on: 23 / October / 2008, 06:56:21 »
Quote

Its disabled for the moment. Someone should report if this camera has iris diaphragm and/or ND Filter..


Hi, I am not sure, but I guess the 590is has a diaphragm, because it offers a relatively wide range of apperture values from f2.6 to f8.0. This is one of the reasons why I bought this camera.

Edit: This is just a wild guess, how can we check?

Edit2: I just had a close look at the lens at longest focal lenth while changing the light conditions. It looks like an iris diaphragm with 6 blades. Cool!
« Last Edit: 23 / October / 2008, 07:03:15 by gho »

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Offline fe50

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Re: A590IS porting...
« Reply #132 on: 23 / October / 2008, 07:10:59 »
Quote
Edit2: I just had a close look at the lens at longest focal lenth while changing the light conditions. It looks like an iris diaphragm with 6 blades. Cool!

Yes, normally you should see the iris, e.g. with using a strong pocket lamp...
...a ND filter is only swinging in or out, you can hear it clicking & you'll see only one rapid change when looking to the lens...

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Offline 73113

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  • Canon Powershot A590 IS
Re: A590IS porting...
« Reply #133 on: 23 / October / 2008, 07:15:52 »

Edit2: I just had a close look at the lens at longest focal lenth while changing the light conditions. It looks like an iris diaphragm with 6 blades. Cool!



lol just came back to say this! I'm pretty sure I saw it  :P
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Re: A590IS porting...
« Reply #134 on: 23 / October / 2008, 07:34:12 »
unfortunately i cannot format my 4 gb card using fat 16, the camera doesnt give me this option, and when i try to format it with the computer (windows xp) via usb card reader it only gives me the option fat 32 (no fat 16 available).
can someone help, please?

Re: A590IS porting...
« Reply #135 on: 23 / October / 2008, 07:36:34 »
unfortunately i cannot format my 4 gb card using fat 16, the camera doesnt give me this option, and when i try to format it with the computer (windows xp) via usb card reader it only gives me the option fat 32 (no fat 16 available).
can someone help, please?

Try this

Bootable SD card - CHDK Wiki

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Offline gho

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Re: A590IS porting...
« Reply #136 on: 23 / October / 2008, 07:52:10 »
Compared the Canon manual focus indicator with the DOF Calculator values. In the macro range it seems to be 5 cm off (Canon: 10 cm/ CHDK: 15 cm, Canon 5 cm/ CHDK: 10 cm).

Edit:
This is no surprise as the a720 focusses at 10 cm minimum.
« Last Edit: 23 / October / 2008, 08:03:08 by gho »

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Offline whim

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Re: A590IS porting...
« Reply #137 on: 23 / October / 2008, 08:32:49 »
@gho

not sure, but try playing with the setting in:

Main Menu -> OSD Parameters -> DOF Calculator -> Subject Distance from lens

if activated, this makes (all ?)  subject distances in CHDK
relative to front of lens instead of sensor (or backplane, not sure)

wim


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Offline ma_jk

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Re: A590IS porting...
« Reply #138 on: 23 / October / 2008, 08:41:22 »
about the iris/nd filter.

I was also trying to hear a "click" for the Nd filter swinging in or out. well, there was none!  :P
But at the same time, if you shoot the same picture with both filter settings, you obtain two different results.

anyway, im on a train right now  :) this evening ill post another build with filter disabled / iris enabled (and hopefully, the sources)

edit: and no theres so SDHC support at the moment...

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Offline gho

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Re: A590IS porting...
« Reply #139 on: 23 / October / 2008, 08:50:42 »
@whim
Changing the settings there did not make much of a difference. Is the distance read from DryOS or calculated seperately?

These are just minor issues, I am quite happy with the port.

I will do some more checking and post what I found. There is also some little thing with the zoom factor values.

As far as I can see, aperture and ISO values are ok.



« Last Edit: 23 / October / 2008, 08:52:20 by gho »

 

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