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fixedint.lua: Astrophotography oriented script for long exposure + timelapse

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Offline reyalp

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Is there any limitation of maximum exposure time?
Yes. The time is measured in microseconds. A bit over 2000 it overflows what fits in a signed, 32 bit integer.

Generally speaking, you are probably better off stacking instead of using such long exposures anyway.
Don't forget what the H stands for.

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Offline reyalp

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Discussion of diplsay/sensor off stuff split to https://chdk.setepontos.com/index.php?topic=13319.0
Don't forget what the H stands for.

Interval of 60s (TV=5s) is a limited as well?
M100 100a, M3 101a, 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), 2*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 reyalp

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Interval of 60s (TV=5s) is a limited as well?
That looks like a bug, thanks.

I haven't tested yet, but I think you can work around this by changing

hook_shoot.set(10000)
to
hook_shoot.set(10000+interval)
Don't forget what the H stands for.


hook_shoot.set(10000+interval)
Thanks, it helps for this condition…

I made another run with Interval of 60s and TV=30s. One run with ‘Disable Canon Dark Frame’ and one without. The different between each shoot was always 60s. I would expect, when Canon does Dark Frames, the different between each shoot would be a little bit higher than 60s.

Than I went to the Canon menu. The M3 has a menu to switch noise reduction on for TV > 1s. Default was auto. I set it to On.
After I set it on, I got always the hockutil timeout error. Independent if I run with ‘Disable Canon Dark Frame’ or without. Even with TV=20s I got the error.


M100 100a, M3 101a, 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), 2*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 reyalp

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I uploaded version 1.3. The main change is that you can now set it to start a specific clock time. I've found this works quite well for satellite passes. If the time is more than a minute in the past, it uses the next day, so you can schedule shots after midnight.

You can also specify zoom and focus distance (subject to the usual CHDK SD override caveats) so the camera can sit in playback mode until it's time to shoot.

The interval issue in comment #22 above is also fixed.
Don't forget what the H stands for.

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Offline reyalp

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One thing this script is useful for is taking multiple images for stacking. Attached sx710 single frame, and median of 60 frames sharpened with RL deconvolution

Bonus:
All the frames as video https://app.box.com/s/v82uw098vi0wwi1gpreiqibfnj6248xh
Don't forget what the H stands for.

 

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