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Long exposure does not work with the dmk41

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Long exposure does not work with the dmk41 was created by Eric Magnien

Hi,
I have not had the opportunity to use my equipment for several months. Recently, i wanted to try my DMK41 camera with the latest version of kstars (on ubuntu Trusty). I realized that I could not do long exposures like before. I'm programming with EKOS ten seconds exposure, obviously, it lasted less than a second. Furthermore, I thought I could adjust the exposure time to 1/10000 second, which allows the DMK, but I can not go below 1/100 second. Besides, I do not know if adjusting to 0.01 (the current limit), the exposure really lasts 0.01. I use kstars 2.2.0 ppa version on ubuntu trusty tahr
9 years 11 months ago #1018

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Replied by Jasem Mutlaq on topic Long exposure does not work with the dmk41

You get the same result even if you use INDI control panel directly to take the exposure?
9 years 11 months ago #1023

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Replied by Eric Magnien on topic Long exposure does not work with the dmk41

Yes, same result :[img size=52.7ko]dl.dropboxusercontent.com/u/90434993/Cap...8%2021%3A07%3A21.png[/img]

30 seconds exposure => 0.009053 seconds
Last edit: 9 years 11 months ago by Eric Magnien. Reason: screen capture
9 years 11 months ago #1035

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Replied by Eric Magnien on topic Long exposure does not work with the dmk41

Despite the latest updates, it is impossible for me to do long exposures with my DMK
What is the difference between DMK CCD and V4L2 CCD drivers? Is it really the driver indi_v4l2_ccd the camera uses? Previously, I could choose between automatic or manual exposure on the INDI control panel, I think. It is no longer possible. Some other settings have also disappeared from the control panel.
Thanks for your help !
9 years 11 months ago #1089

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Replied by Jasem Mutlaq on topic Long exposure does not work with the dmk41

I just committed a rather trivial change that should fix this, please update libindi and let us know if it works.
9 years 11 months ago #1092

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Replied by Eric Magnien on topic Long exposure does not work with the dmk41

It's much better now, I can again make long exposures with ekos or indi control panel. Thanks !
However, I get erratic results in two cases: when there are digits after the decimal for exposure time (for example, 5.50 gives 5.063523 , 10.50 => 10.064609, 0.70 => 0.060172, etc.) either by Ekos or by the INDI control panel. I should avoid for now to pose below the second, and in general avoid digits after the decimal. Maybe a problem with the regional format management between commas and points in the numbers?
The second problem happens when I program a series of images. For example, ten images of five seconds:
2014-05-09T00:00:14: Capture of ONE frame (1 stacked frames) took 4.616194 seconds. 
2014-05-09T00:00:09: Capture of ONE frame (1 stacked frames) took 4.623662 seconds. 
2014-05-09T00:00:03: Capture of ONE frame (1 stacked frames) took 4.570533 seconds. 
2014-05-08T23:59:58: Capture of ONE frame (1 stacked frames) took 4.557049 seconds. 
2014-05-08T23:59:53: Capture of ONE frame (1 stacked frames) took 4.566814 seconds. 
2014-05-08T23:59:48: Capture of ONE frame (1 stacked frames) took 4.526086 seconds. 
2014-05-08T23:59:43: Capture of ONE frame (1 stacked frames) took 4.616735 seconds. 
2014-05-08T23:59:38: Capture of ONE frame (1 stacked frames) took 4.479772 seconds. 
2014-05-08T23:59:33: Capture of ONE frame (1 stacked frames) took 4.516213 seconds. 
2014-05-08T23:59:28: Capture of ONE frame (1 stacked frames) took 5.063938 seconds.
And five images of 20 seconds :
2014-05-09T00:11:03: Capture of ONE frame (1 stacked frames) took 14.386489 seconds. 
2014-05-09T00:11:23: Capture of ONE frame (1 stacked frames) took 19.428895 seconds. 
2014-05-09T00:11:43: Capture of ONE frame (1 stacked frames) took 19.519953 seconds. 
2014-05-09T00:12:03: Capture of ONE frame (1 stacked frames) took 19.574932 seconds. 
2014-05-09T00:12:23: Capture of ONE frame (1 stacked frames) took 19.560687 seconds.
But the exposure times that are displayed are perhaps not correct, if we refer to time intervals ?
9 years 11 months ago #1097

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