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CHDK for longtime timelapse

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Offline dolomiti_timelapse

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Re: CHDK for longtime timelapse
« Reply #110 on: 24 / February / 2022, 05:38:52 »
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Regarding direct sunlight on the sensor: the sun now shines for a good hour every day direct onto the sensor without permanent damage.

For the past few weeks I have been shooting the sunrise where the sun shines directly into the camera lens and onto the sensor. I'm using the G1X with 20% zoom. The aperture is open to the maximum. And I didn't have any temperature issues. Attached is a plot of the temperature history.
There are a few things to note:
-Only early morning sun shines directly into the camera lens.
The sun only shines on the sensor in the winter months, not in the summer, as the sun then disappears to the left out of view.
The winter months are very cold here (-15°C), and even with the camera under the roof, the temperature where the camera is located is between 15°C and 20°C.
The camera is behind a double glazed window (so I guess the UV rays are absorbed by the glass of the window?).
I had no problems with the temperature (overheating) and no burns or permanent damage to the sensor.

The sunrises with direct sunlight in winter are not so nice, but in summer, when the sun shines more from the left, the valley is well lit. Since I want to leave the recording period throughout the year the same (always adjusted to the according sunrise time), I think it is better so if even in winter at the end of the sunrise timelapse the sun shines.
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Offline blackhole

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Re: CHDK for longtime timelapse
« Reply #111 on: 24 / February / 2022, 07:50:44 »
Quote from: dolomiti_timelapse on 24 / February / 2022, 05:38:52
Regarding direct sunlight on the sensor: the sun now shines for a good hour every day direct onto the sensor without permanent damage.
Be careful and with the temperature of the optics, plastic parts can deform very easily.
I have collected a lot of destroyed optics over the years due to the influence of heat. All my glass filters for observing the Sun have cracked from the heat, in fact today I find it hard to believe that they once advised people to use this type of filter.
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Offline c_joerg

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Re: CHDK for longtime timelapse
« Reply #112 on: 24 / February / 2022, 14:42:05 »
Quote from: dolomiti_timelapse on 24 / February / 2022, 03:08:55
But what will be the pointer for the the G1X 100e for the call_func_ptr. Have you once tried it with your G1X 100e?
It's been a while but that should be the call
G1x 100e


Quote from: dolomiti_timelapse on 24 / February / 2022, 05:38:52
Regarding direct sunlight on the sensor: the sun now shines for a good hour every day direct onto the sensor without permanent damage.
I always look at your time lapses and don't think it's critically, especially when it's in the time of sunrises and sunsets. I do this a lot too and have never had any problems. I would never do that in the midday sun. With the G1x, however, I always use the built-in ND filter.
« Last Edit: 25 / February / 2022, 00:11:20 by c_joerg »
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M100 100a, M3 121a, G9x II (1.00c), 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), S45,
Flickr https://www.flickr.com/photos/136329431@N06/albums
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Offline dolomiti_timelapse

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Re: CHDK for longtime timelapse
« Reply #113 on: 24 / February / 2022, 16:36:03 »
Quote from: blackhole on 24 / February / 2022, 07:50:44
Be careful and with the temperature of the optics, plastic parts can deform very easily.
I have collected a lot of destroyed optics over the years due to the influence of heat. All my glass filters for observing the Sun have cracked from the heat, in fact today I find it hard to believe that they once advised people to use this type of filter.

At which temperature do you think the plastic parts in the optics can deform?
Do you know the type of plastic Canon uses for powershot zooms?
Do you think the temperature in the plot is high enough to cause damage?

My knowledge was that the operating temperature is up to 40°C so the camera should handle some internal heat over 40°C?
« Last Edit: 24 / February / 2022, 16:41:36 by dolomiti_timelapse »
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Offline dolomiti_timelapse

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Re: CHDK for longtime timelapse
« Reply #114 on: 24 / February / 2022, 17:07:18 »
Quote from: c_joerg on 24 / February / 2022, 14:42:05
It's been a while but that should be the call
G1x 100e
Code: [Select]
call_func_ptr(0xff32eb08)

I tried in the ptp GUI
Code: [Select]
=call_func_ptr(0xff32eb08)and
Code: [Select]
=call_event_proc'System.Create' p=call_event_proc('AllocateMemory',4) return call_func_ptr(0xff32eb08,p),p,peek(p)and in the cmd i tried the comand:
Code: [Select]
chdkptp -c -e"exec con:call_function(0xff32eb08)"
and all 3 let the camera crash.  :(

Quote
I always look at your time lapses and don't think it's critically, especially when it's in the time of sunrises and sunsets. I do this a lot too and have never had any problems. I would never do that in the midday sun. With the G1x, however, I always use the built-in ND filter.

Yeah, sometimes there are timelapse worth watching.

Yes I always use the ND filter too. And since the temperature sensor of the optics says it never goes over 50°C (normally it maxes out at around 40°C) it should be fine. 8)
« Last Edit: 24 / February / 2022, 17:09:54 by dolomiti_timelapse »
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Offline reyalp

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Re: CHDK for longtime timelapse
« Reply #115 on: 24 / February / 2022, 19:16:57 »
Quote from: dolomiti_timelapse on 24 / February / 2022, 17:07:18
Quote from: c_joerg on 24 / February / 2022, 14:42:05
It's been a while but that should be the call
G1x 100e
Code: [Select]
call_func_ptr(0xff32eb08)
That's definitely no the right address, it points at at string. I think you want 0xff42bce0, and to use code like the example in https://chdk.setepontos.com/index.php?topic=13916.msg146690#msg146690

Code: [Select]
=call_event_proc'System.Create' p=call_event_proc('AllocateMemory',4) return call_func_ptr(0xff42bce0,p),p,peek(p)
That will return
1) the return value of function  0xff42bce0, which is the size of the xml
2) the value of the pointer allocated with AllocateMemory (not used here)
3) The value stored at the point, which is the address of the XML.
To read the value out, you use rmem in the link with the #3 as the address and #1 as the size, like this (but with whatever numbers you got)
Code: [Select]
rmem 1079217376 2912 -f=caminfo.xml

edit: Just for clarity, the above address is for g1x 100e, based on being the first function called from GetCameraInformationData_FW which is ff32e354

« Last Edit: 24 / February / 2022, 19:37:32 by reyalp »
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Offline blackhole

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Re: CHDK for longtime timelapse
« Reply #116 on: 24 / February / 2022, 21:08:06 »
Quote from: dolomiti_timelapse on 24 / February / 2022, 16:36:03
At which temperature do you think the plastic parts in the optics can deform?
Do you know the type of plastic Canon uses for powershot zooms?
Do you think the temperature in the plot is high enough to cause damage?

My knowledge was that the operating temperature is up to 40°C so the camera should handle some internal heat over 40°C?
I don't know what kind of plastic Canon uses, but if you point the lens directly at the sun, the temperature will rise very quickly, certainly over 40 ° C. You have probably tried to light a match or a piece of paper using a simple lens, ignition occurs at a temperature that the camera certainly cannot withstand. The lens in the camera is much more sophisticated and will produce a high temperature faster. If you read the "Safety Precautions" section in the user manual, you will see that Canon warns of possible sensor damage in this case.
If you see the Sun in the frame, it does not mean that the lens is facing directly at the sun and that there will always be damage.
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Offline c_joerg

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Re: CHDK for longtime timelapse
« Reply #117 on: 25 / February / 2022, 00:16:31 »
Quote from: reyalp on 24 / February / 2022, 19:16:57
That's definitely no the right address, it points at at string. I think you want 0xff42bce0, and to use code like the example in https://chdk.setepontos.com/index.php?topic=13916.msg146690#msg146690

Hmm, I found it in a script on my pc called G1x_CamInfo.lua. So I must have used it at some point. Maybe for the G1x 101a?

Quote from: dolomiti_timelapse on 24 / February / 2022, 16:36:03
At which temperature do you think the plastic parts in the optics can deform?
Do you know the type of plastic Canon uses for powershot zooms?
Do you think the temperature in the plot is high enough to cause damage?

The question is also at which point are the temperatures measured and what does that say. Here are examples where the sensor temperature of a camera in the car repeatedly went up to 80 degrees.

My G1x sometimes has 70 degrees sensor temperature when I do time-lapse with it.



« Last Edit: 25 / February / 2022, 00:27:12 by c_joerg »
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Offline c_joerg

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Re: CHDK for longtime timelapse
« Reply #118 on: 26 / February / 2022, 06:16:34 »
Quote from: c_joerg on 25 / February / 2022, 00:16:31
Hmm, I found it in a script on my pc called G1x_CamInfo.lua. So I must have used it at some point. Maybe for the G1x 101a?

Looks like there was a script for 101a. On the 100e it crashes.
Unfortunately, I lent my 101a to check that.
Sorry for the inconveniences  :(
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M100 100a, M3 121a, G9x II (1.00c), 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), S45,
Flickr https://www.flickr.com/photos/136329431@N06/albums
YouTube https://www.youtube.com/channel/UCrTH0tHy9OYTVDzWIvXEMlw/videos?shelf_id=0&view=0&sort=dd
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Offline dolomiti_timelapse

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Re: CHDK for longtime timelapse
« Reply #119 on: 28 / February / 2022, 02:51:23 »
Quote from: c_joerg on 26 / February / 2022, 06:16:34

Looks like there was a script for 101a. On the 100e it crashes.
Unfortunately, I lent my 101a to check that.
Sorry for the inconveniences  :(

No problem, thank you very much for your help!
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