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G11 porting

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Offline KaLi

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Re: G11 porting
« Reply #380 on: 19 / February / 2010, 04:58:07 »
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I tried to manually activate/deactivate the override values via HalfPress+DOWN (or HalfPress+UP = G7)... but both procedures didn't work.

Is this a bug? Or is this feature set to other key/button combinations for the G11?
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Offline fe50

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Re: G11 porting
« Reply #381 on: 19 / February / 2010, 05:02:11 »
Quote from: KaLi on 19 / February / 2010, 04:50:03
but I guess, this is conform to the chdks manual. There is written, that also the exif info would be wrong = set to the maximum value, which are just plausible for the camera.
If I take photos with 1/100k they are very dark -- therefore, the Tv is much higher than 1/4000... but to know the real Tv, one has to take test shots under constant lightning conditions with different TVs.

to know exactly the override values, you could display them with chdk in the display.
Yes.
The Canon firmware only knows the "own", Canon values; the Canon OSD shows the nearest known value, e.g. the max. available Canon Tv value.
Since the Canon firmware also writes the EXIF data, it's the same with the those values.

But there are also some useful informations in the EXIF meta data area: the camera writes some CHDK-overwritten (real) values to the EXIF makernotes...

To handle the EXIF data (and also view/edit the makernotes there), there's Phil Harvey's great  ExifTool.
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Offline fe50

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Re: G11 porting
« Reply #382 on: 19 / February / 2010, 05:07:59 »
Quote from: KaLi on 19 / February / 2010, 04:58:07
I tried to manually activate/deactivate the override values via HalfPress+DOWN (or HalfPress+UP = G7)... but both procedures didn't work.

First check whether Disable Overrides is set to OFF,
then try other half-press key combinations, e.g. half-press + left (Ixus series)...

With the correct key you'll see NO OVERRIDES on the OSD...
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Offline thanh

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Re: G11 porting
« Reply #383 on: 19 / February / 2010, 05:19:38 »
"Yes. The Canon firmware only knows the "own", Canon values; the Canon OSD shows the nearest known value, e.g. the max. available Canon Tv value.
Since the Canon firmware also writes the EXIF data, it's the same with the those values."

Yeah, although the canon firmware is able to display correctly higher apertures when I use the override aperture function - e.g. the canon firmware will display an aperture of 11 , when without chdk running too, it can't get that slow.

The Tv values displaying using the OSD are correct (i.e. the overrided values e.g. 1/10,000), but the exposure seems to be exactly the same for 1/100k as 1/4k, with the same ISO and Av. Will try that exif tool and report back ..
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Offline thanh

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Re: G11 porting
« Reply #384 on: 19 / February / 2010, 05:28:13 »
Have looked at the exif data using the above tool, and it seems that the Tv has maxed out at 1/4,000 on all the shots I took, even when the override was set to a much faster value. Any ideas?
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Offline KaLi

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Re: G11 porting
« Reply #385 on: 19 / February / 2010, 05:29:21 »
Quote from: fe50 on 19 / February / 2010, 05:07:59

First check whether Disable Overrides is set to OFF,
then try other half-press key combinations, e.g. half-press + left (Ixus series)...

With the correct key you'll see NO OVERRIDES on the OSD...

Okay... that solves the Problem ;-) -- I should have read the manual more carefully

Could this override on/off mapped to some other key/button combinations (maybe as function in one of the chdk menus)? The ring/quadbutton is not easy to press with half pressed release button; especially under circumstances like darkness or cold and clumsy fingers. The two buttons above the ring/quadbutton have no function while the release button is half pressed.
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Offline KaLi

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Re: G11 porting
« Reply #386 on: 19 / February / 2010, 05:40:00 »
Quote from: thanh on 19 / February / 2010, 05:28:13
Have looked at the exif data using the above tool, and it seems that the Tv has maxed out at 1/4,000 on all the shots I took, even when the override was set to a much faster value. Any ideas?

I guess, one has to use the Tv-mode (on dial) to use the override values. I just tried Tv and Av overrides and set M on the dial. That worked... I just took a photo with 1/1000 and f2.7 ... 1/4000 and f2.7 via override (and not set via the Canon own settings).


Just in the moment I wanted to try 1/8000 and f2.8 (and look if the picture is visibly darker) my battery gave up ... that brings me to the question: Is the last battery readout saved somewhere (in some hidden debug data)? It was something between 7V and 6.7V ... I would like to know the exact value for battery calibration.
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Offline thanh

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Re: G11 porting
« Reply #387 on: 19 / February / 2010, 05:49:46 »
Ah Sorry, just remembered one more thing - I can override Tv for values lower than 1/4k, but anything faster that doesn't work. It's the fast speeds that I'd like access too
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Offline fe50

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Re: G11 porting
« Reply #388 on: 19 / February / 2010, 06:03:17 »
@thanh:
Quote from: thanh on 19 / February / 2010, 05:19:38
Yeah, although the canon firmware is able to display correctly higher apertures when I use the override aperture function - e.g. the canon firmware will display an aperture of 11 , when without chdk running too, it can't get that slow.
Often the Canon firmware tables contain values which are not available from the Canon settings, e.g. ISO values lower than 80 or 50...

Quote from: thanh on 19 / February / 2010, 05:28:13
Have looked at the exif data using the above tool, and it seems that the Tv has maxed out at 1/4,000 on all the shots I took, even when the override was set to a much faster value. Any ideas?
+
Quote from: thanh on 19 / February / 2010, 05:49:46
I can override Tv for values lower than 1/4k, but anything faster that doesn't work.
Maybe it's an issue known on some newer cameras, the "Extended Ev" issue...
E.g. on the SX10, the fast speed shutter overrides need to be set different to other cameras in the CHDK code...
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Offline fe50

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Re: G11 porting
« Reply #389 on: 19 / February / 2010, 06:10:03 »
« Last Edit: 19 / February / 2010, 06:12:15 by fe50 »
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