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Chronos User Discussion / Re: SpaceX's Falcon Heavy launch shot on Chronos!
« Last post by Buddlich on July 08, 2019, 01:36:16 PM »
Isn't that just the normal Falcon 9 ... and a Delta 2?

Still awesome footage! *___*
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Software Dev / Re: Chronos V0.3.2 Beta - Updated June 25th 2019 with beta-6
« Last post by NiNeff on July 08, 2019, 10:50:05 AM »
Do the vertical bands and the increased noise level issues persist after performing a black calibration? Note that changing the framerate will cause a change in frame timing that may invalidate the black calibration. In particular, framerates above 1053fps at 1280x1024 will need a different black calibration from framerates below 1053fps.
They mostly disappear after back calibration, and I'm now actually unable to reproduce the really noticeable ones I got on the first tests. Maybe doting several black calibs helped.
As for the horizontal lines; There is a horizontal artifact that appears in the raw image that corresponds to timing of where the shutter signal changes relative to the frame readout. The line of the image where this occurs is normally corrected by the black calibration. However, if the shutter is changed after black calibration then the calibration data will no longer correct for this artifact. The result is that you will see one or two horizontal lines on the image that will persist until a new black calibration is performed. This issue has existed in all previous software releases of the Chronos.
Not really a problem though as I'm not intending to change the shutter during recording.
Another possible cause of horizontal lines that we are aware of when changing the shutter from the main window. If the shutter is changed in the middle of a frame it can result in a change in brightness partway through the image and this appears as bright flashes while changing shutter. However the issue should not persist for longer than a single frame.
While testing I never got bright flashes but sometimes completely black horizontal bands in the recording, but again understandable and not really an issue for "reasonable" usage. If i ever need to change the shutter during recordings it might be also achieved by changing the aperture and so on.

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Software Dev / Re: Chronos V0.3.2 Beta - Updated June 25th 2019 with beta-6
« Last post by foobar on July 07, 2019, 07:13:34 PM »
Do the vertical bands and the increased noise level issues persist after performing a black calibration? Note that changing the framerate will cause a change in frame timing that may invalidate the black calibration. In particular, framerates above 1053fps at 1280x1024 will need a different black calibration from framerates below 1053fps.

As for the horizontal lines; There is a horizontal artifact that appears in the raw image that corresponds to timing of where the shutter signal changes relative to the frame readout. The line of the image where this occurs is normally corrected by the black calibration. However, if the shutter is changed after black calibration then the calibration data will no longer correct for this artifact. The result is that you will see one or two horizontal lines on the image that will persist until a new black calibration is performed. This issue has existed in all previous software releases of the Chronos.

Another possible cause of horizontal lines that we are aware of when changing the shutter from the main window. If the shutter is changed in the middle of a frame it can result in a change in brightness partway through the image and this appears as bright flashes while changing shutter. However the issue should not persist for longer than a single frame.
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Software Dev / Re: Chronos V0.3.2 Beta - Updated June 25th 2019 with beta-6
« Last post by NiNeff on July 06, 2019, 02:16:22 AM »
Sorry for the delayed test, but here are my findings (just to be safe I let the cam warm up and did black calibration for all resolutions)

- in 0.3.2 b6 i now have vertical bands for the first time, never had them in any version up to 0.3.1 (images available on request).
- lowering the framerate while keeping the resolution the same dramatically increases the noise level. I'm not sure if this was always the case, but it seems new. I experienced this after doing a black cal on 1069 fps and with the lenscap still on then changing to 1000 fps.
- changing the shutterangle sometimes leads to horizontal bands on the display, haven't tried recording while changing the shutter yet.
- I really like the new util screen, especially for the storage!
- also had the full power fan on the first boot, now it seems to behave normally.
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Chronos User Discussion / Re: SpaceX's Falcon Heavy launch shot on Chronos!
« Last post by Cornflakes on July 04, 2019, 05:49:39 PM »
That is awesome!
I've been a space geek since the 1960's, now I'm a slo mo geek.
Question: is the blue Danube recording public domain? My biggest problem with posting my YouTube videos is selecting music that's not copyrighted with the associated problems if it is

From personal experience, youtube actually has a database built into it that will show you the copyright protection of most music/songs that are "officially" uploaded to it.
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Chronos User Discussion / Re: SpaceX's Falcon Heavy launch shot on Chronos!
« Last post by Cornflakes on July 04, 2019, 05:48:32 PM »
Impressive!

How close did you place these cameras?

I wasn't there but I can imagine they where zoomed-in quite a bit! You can't get too close to active rockets  ;D
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Chronos User Discussion / Re: SpaceX's Falcon Heavy launch shot on Chronos!
« Last post by Fyodor on July 04, 2019, 03:18:37 AM »
Impressive!

How close did you place these cameras?
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That is awesome!
I've been a space geek since the 1960's, now I'm a slo mo geek.
Question: is the blue Danube recording public domain? My biggest problem with posting my YouTube videos is selecting music that's not copyrighted with the associated problems if it is
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Chronos User Discussion / SpaceX's Falcon Heavy launch shot on Chronos!
« Last post by Cornflakes on July 03, 2019, 12:56:18 PM »
Spectacular footage of the last launch that happened on June 25 when SpaceX launched it's 24 satellites into orbit. Check out what we captured in slow motion!

https://youtu.be/PaooERICNaE


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Chronos User Discussion / Re: Corrupted SD card
« Last post by Prehistoricman on July 02, 2019, 11:19:20 AM »
That's unfortunate. Thanks for the advice, I will buy another.
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