Astrophotography Time Lapce using CHDK - blog post - page 2 - Creative Uses of CHDK - CHDK Forum
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Astrophotography Time Lapce using CHDK - blog post

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Offline zeno

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Re: Astrophotography Time Lapce using CHDK - blog post
« Reply #10 on: 18 / August / 2009, 07:24:44 »
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Chop the "p//" out of the html link and it works (at least it does for me)
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Offline guysoft42

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Re: Astrophotography Time Lapce using CHDK - blog post
« Reply #11 on: 22 / August / 2009, 06:18:24 »
Quote from: Hacki on 18 / August / 2009, 07:24:27
The link in the first posting is broken. It should be http://guysoft.wordpress.com/about/videos-of-sky/
Ok, that will explain other posts, fixed.

Quote from: reyalp on 16 / August / 2009, 19:10:54
I'd guess you had dark frame subtraction off.
Yes, I am not sure how to do a darkframe. Do you know what settings I should put on the camera to make one? I could add it to the script for next time.
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Offline reyalp

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Re: Astrophotography Time Lapce using CHDK - blog post
« Reply #12 on: 22 / August / 2009, 18:12:02 »
Quote from: guysoft42 on 22 / August / 2009, 06:18:24
Yes, I am not sure how to do a darkframe. Do you know what settings I should put on the camera to make one? I could add it to the script for next time.

You can set canon darkframe subtraction auto, off or on using set_nr (0,1,2 respectively). Note that this will take a darkframe after each exposure, doubling the time required to capture each image, and halving your actual coverage of the sky.

You could also take a darkframe manually (by covering the lens) and subtract it in post processing. You'll probably want to work in raw or DNG if you do this.
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Offline guysoft42

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Re: Astrophotography Time Lapce using CHDK - blog post
« Reply #13 on: 01 / September / 2009, 07:30:06 »
Quote from: reyalp on 22 / August / 2009, 18:12:02
You could also take a darkframe manually (by covering the lens) and subtract it in post processing. You'll probably want to work in raw or DNG if you do this.
Isn't it possible to make a script that will create a darkframe (without using your hands)?

Also, do you have a way to automatically batch process raw .CRW files? I did not find any tool for this.
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Offline reyalp

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Re: Astrophotography Time Lapce using CHDK - blog post
« Reply #14 on: 01 / September / 2009, 19:07:47 »
Quote from: guysoft42 on 01 / September / 2009, 07:30:06
Quote from: reyalp on 22 / August / 2009, 18:12:02
You could also take a darkframe manually (by covering the lens) and subtract it in post processing. You'll probably want to work in raw or DNG if you do this.
Isn't it possible to make a script that will create a darkframe (without using your hands)?
Not yet.

Quote
Also, do you have a way to automatically batch process raw .CRW files? I did not find any tool for this.
There are some command line tools that understand CHDK CRW.  dcraw for example. You could easily make a shell script/batch file to do bulk processing.
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