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INDI Library v1.8.3 Released (02 Jan 2020)

Minor monthly bugfix release with a new RainbowAstro mount driver and improved pier side simulation.

Dark frame with 450D

2 weeks 11 hours ago 1 week 6 days ago by Kai.
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Dark frame with 450D #49124
Hi,
Does the EOS 450D have an internal shutter? Can I take a dark frame with EKOS without dust cover?

Kai

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1 week 6 days ago
Kai
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Dark frame with 450D #49180
I think the Eos 450D has an internal shutter. It is a Canon DSLR.
As I understand it, Ekos capture take a dark frame without the need to use a dust cover. Is that correct?
I have taken a dark frame and the fits file is also in the directory "~/.local/share/kstars/darks". But it is not a dark frame. It is a light frame! What am I doing wrong?

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1 week 3 days ago
Herrhausen
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Dark frame with 450D #49316
You have to cover the lens in order to take a dark frame.

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1 week 3 days ago
Kai
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Dark frame with 450D #49325
Hello Herrhausen,
thanks for your information.
I would like to create the dark frame remotely if possible.
Can the internal shutter not be used for the dark frame?
The EOS 450D can generate a dark frame itself for noise reduction and process this with the current image.
Should it not be possible to use this function in Ekos?
If the EOS 450D has an internal shutter it can be used for a dark frame. Is the internal shutter not usable for the 450D?
Kai

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1 week 3 days ago
Herrhausen
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Dark frame with 450D #49328
In order to use this function your camera would have to provide it. As I see it (I might be wrong!), the 450D's dark frame is used internally only to process a corresponding light frame "on the fly". AFAIK only the calibrated light frame is saved/exported. So this is not a limitation of Ekos but rather the camera. Should you find any information that would suggest otherwise, please let me know!

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1 week 3 days ago 1 week 3 days ago by Kai.
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Dark frame with 450D #49334
I was playing around with gphoto2.
I got a remote dark frame with following settings:
Switch to bulb mode => gphoto2 --set-config shutterspeed=0
Take a remote dark frame => gphoto2 --set-config bulb=1 --wait-event=0s --set-config bulb=0 --wait-event-and-download=2s

How am I gonna make this work with Ekos? I use gphoto2 lib in Ekos for my EOS 450D.

later addition: Ok, I made a mistake. The dark frame must have the same exposure time as the light frame. 0s is too short!!!

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