SX170 porting - page 21 - DryOS Development - CHDK Forum
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SX170 porting

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Offline TMHKR

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  • Canon PowerShot SX170 IS (1.01a firmware)
Re: SX170 porting
« Reply #200 on: 27 / January / 2015, 16:41:01 »
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Quote from: BinMaster on 27 / January / 2015, 15:10:19
AV, TV, THE P, EVERYTHING SEEMS TO BE CORRECT, I THINK IS READY FOR AN ALPHA VERSION. UNLESS SOMEONE HAS FOUND SOME RARE THING BUT MY POINT OF VIEW THIS FOR LAUNCH.

The pre-alpha build for firmware version 1.01a has a bug in Override Av function. The Av values are weird, and need to be corrected:

2.88, 3.02, 3.46, 4.05, 4.44, 4.95, 5.57, 6.08, 31.36, -5.-14, 8.62, -9.-38, 26.93, 18.22, 32.51, 7.09, 10.66, -18.-76
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Offline waterwingz

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Re: SX170 porting
« Reply #201 on: 27 / January / 2015, 17:39:23 »
Quote from: TMHKR on 27 / January / 2015, 16:41:01
The pre-alpha build for firmware version 1.01a has a bug in Override Av function. The Av values are weird, and need to be corrected:
2.88, 3.02, 3.46, 4.05, 4.44, 4.95, 5.57, 6.08, 31.36, -5.-14, 8.62, -9.-38, 26.93, 18.22, 32.51, 7.09, 10.66, -18.-76
I've always wanted to own a camera that could defy the laws of physics with an  -f76 setting. Time travel might even be possible!
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Ported :   A1200    SD940   G10    Powershot N    G16
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Offline BinMaster

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Re: SX170 porting
« Reply #202 on: 29 / January / 2015, 08:54:25 »
forgiveness for the above, I was wrong about the values of AV, are wrong, those values are impossible.
-f76 ???
When I shoot raw, leaving some dots of color. it is due?  ???
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Offline TMHKR

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  • Canon PowerShot SX170 IS (1.01a firmware)
Re: SX170 porting
« Reply #203 on: 29 / January / 2015, 10:36:38 »
Quote from: BinMaster on 29 / January / 2015, 08:54:25
forgiveness for the above, I was wrong about the values of AV, are wrong, those values are impossible.
-f76 ???

I'm just waiting 1.01a firmware port to continue with testing. After the weird Av values are corrected, it should be released to Autobuild so more people can test it further. Note that it will probably be the new CHDK 1.4.0 version, and not the currently stable 1.3.0.

According to SX170 manual, available Av values are:  3.5  4.0  4.5  5.0  5.6  5.9  6.3  7.1  8.0

RAW, Av values, and bracketing via custom timer (equally exposed photos) were the biggest problems of this port, or at least the biggest ones I encountered so far. There could be some other minor bugs too, but this should reach Autobuild soon.

As for the color dots in RAW you mentioned, they are probably hot (stuck) pixels. I had few of them too, but I always shoot at lowest ISO.
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Offline BinMaster

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Re: SX170 porting
« Reply #204 on: 29 / January / 2015, 13:14:06 »
Quote from: TMHKR on 29 / January / 2015, 10:36:38
According to SX170 manual, available Av values are:  3.5  4.0  4.5  5.0  5.6  5.9  6.3  7.1  8.0

with CHDK can achieve greater aperture so not us guide us precisely the manual.
I would go below the 2.88 would be great, hopefully this limited only by software rather than hardware.
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Offline waterwingz

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Re: SX170 porting
« Reply #205 on: 29 / January / 2015, 13:38:53 »
Quote from: BinMaster on 29 / January / 2015, 13:14:06
Quote from: TMHKR on 29 / January / 2015, 10:36:38
According to SX170 manual, available Av values are:  3.5  4.0  4.5  5.0  5.6  5.9  6.3  7.1  8.0
with CHDK can achieve greater aperture so not us guide us precisely the manual.
I would go below the 2.88 would be great, hopefully this limited only by software rather than hardware.
There are reports that CHDK can cause some cameras to use slightly smaller opening ( larger F-stop number ) than what the Canon firmware provides.  The resulting image quality is reported to be quite bad.   

There is virtually no chance that CHDK can get a larger opening ( smaller f-stop number ).
« Last Edit: 29 / January / 2015, 15:18:50 by waterwingz »
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Offline srsa_4c

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Re: SX170 porting
« Reply #206 on: 29 / January / 2015, 15:59:29 »
About Av: I would recommend using parts of the sx160 port, as far as I know these two models have the same optical unit. aperture_sizes_table[] in platform/sx160is/shooting.c ...

edit:
attached code_gen'd patch for 100a and 101a
« Last Edit: 05 / February / 2015, 16:47:05 by srsa_4c »
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Offline TMHKR

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  • Canon PowerShot SX170 IS (1.01a firmware)
Re: SX170 porting
« Reply #207 on: 30 / January / 2015, 07:29:38 »
Quote from: srsa_4c on 29 / January / 2015, 15:59:29
About Av: I would recommend using parts of the sx160 port, as far as I know these two models have the same optical unit. aperture_sizes_table[] in platform/sx160is/shooting.c ...

Yes, the only differences between SX160 and SX170 are firmware and battery. I hope nafraf reads this. :)
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Offline srsa_4c

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Re: SX170 porting
« Reply #208 on: 05 / February / 2015, 10:55:33 »
Test builds for 100a and 101a. Time limit: 7 days. Source patch is attached to my previous post above. *Note that the test builds are CHDK 1.4 builds.

Changes:
- I have removed a RAW processing delay, I'd like to know whether the RAW/DNG file naming and file contents are still fine.
- I have added an extra ISO override hook for the 101a build, because it was enabled for the 100a port (and nafraf's camera is 100a).
- I have replaced the aperture table with the one from the sx160 port. Does this fix the Av override values?

So, if possible, please test
- photo overrides (including Av)
- RAW/DNG: file naming

Also, somebody please run the TEST/ISOBASE.LUA script, and post the result.


edit: old builds removed
« Last Edit: 06 / February / 2015, 16:38:58 by srsa_4c »
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Offline TMHKR

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  • Canon PowerShot SX170 IS (1.01a firmware)
Re: SX170 porting
« Reply #209 on: 05 / February / 2015, 15:54:03 »
Quote from: srsa_4c on 05 / February / 2015, 10:55:33
Test builds for 100a and 101a. Time limit: 7 days. Source patch is attached to my previous post above. *Note that the test builds are CHDK 1.4 builds.

1.01a firmware:

- Override Av values:  3.60  4.10  4.72  5.26  5.67  6.08  6.35  7.12  8.00  8.98  10.07  11.31  12.69  14.25  16.00

- DNG files and numbering:  DNG files opened in Photoshop CS6. Photos and numbering are OK, there is some barrel distortion and vignetting (the photos were taken at full wide-angle).

- ISOBASE.LUA script:

*** STARTED ***
BASE=200, set
CAM_MARKET_ISO_BASE 200
press any key to exit
*** FINISHED ***

(bracketing via custom timer still doesn't work, it only works in continuous mode)
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