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Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« Last post by Sael on October 17, 2018, 03:15:15 AM »
While not suitable for it, decent results can be gotten from the Chronos. Because the noise gets worse as you below 60FPS that's the lowest I went. The lens is a Tamron 150-600mm F/5-6.3. Video recorded at 600mm F/6.3, Moon at 60FPS, and mars at 500FPS.
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Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« Last post by Nikon1 on October 17, 2018, 03:01:28 AM »
@tesla500
Ok, that is good to know.
.
@BiduleOhm
Well, the moon is actually quite a bright object in the Sky. If you want to do some deep Sky-Object Photography you will have to deal with far less bright objects in the Sky.
Also i guess that image of the moon was shot on the Kit Lens @75mm...? Based on the Size... Dont know what apperture tho, could be anything from 1.2 (Rather unlikely that NiNeff used 1.2 on that) to like 11...?
As far as Sensitivity of the Sensor goes, i found in side-By-Side testing with my Nikon1 that the Base-Gain (Gain 0) is about as sensitive as ISO 160 or 200 and the highest available Gain-Setting should be compareable with ISO 3200 as far as Sensitivity goes, but i havent tested that side-By-Side for the higher Gain-Values for verification.
While it is possible to use 1.2 on something like the Kit lens, if you want something longer (Like Telescopes), you will get appertures of 5,6 or below. Also most Lenses Wont perform best when wide-Open, so you will need to Stop most of them down a bit to get good image Quality. And if you simply expose your image Longer then, i guess Noise will get even Worse.
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Software Dev / Re: Chronos V0.3.1 Beta
« Last post by tesla500 on October 17, 2018, 12:25:57 AM »
Is there something else missing from the CinemaDNG tags? Even Photoshop cannot open the files. No previews in macOS.
I'm having no trouble with the new beta 9 and Photoshop CS5 now.
TIFF files open with no issues. CinemaDNG does not open in Davinci Resolve or in Photoshop CC 2019. Even Lightroom CC 2015 does not want them.
And yes I'm using beta 9.

Could you upload a problem DNG file here so we can investigate?
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Software Dev / Re: Chronos V0.3.1 Beta
« Last post by Johnny on October 17, 2018, 12:08:50 AM »
Is there something else missing from the CinemaDNG tags? Even Photoshop cannot open the files. No previews in macOS.
I'm having no trouble with the new beta 9 and Photoshop CS5 now.
TIFF files open with no issues. CinemaDNG does not open in Davinci Resolve or in Photoshop CC 2019. Even Lightroom CC 2015 does not want them.
And yes I'm using beta 9.
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Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« Last post by tesla500 on October 16, 2018, 04:44:34 PM »
The noise you're seeing here is actually just dark noise. Black cal won't work below about 60fps, so what you're seeing is an uncalibrated image. Try doing a black cal at 60fps then changing to 10fps.
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Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« Last post by BiduleOhm on October 16, 2018, 02:39:21 PM »
Well... with a lot of averaging (like hundred of frames) it's maybe possible.

I guess the thing is as the sensor is very sensitive you don't need the multiple seconds exposure (as your test at 10 fps proves it) so you can do a lot of shoots in a relatively short amount of time and average them to have a better SNR. I'd say to also test at a higher framerate (something like 20 or 30 fps for example) to see if it improves things, or not... (I don't know if the SNR is the same at 10 fps and 30 fps so I guess only a test will answer that).
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Software Dev / Re: Chronos V0.3.1 Beta
« Last post by NiNeff on October 16, 2018, 11:54:14 AM »
Is there something else missing from the CinemaDNG tags? Even Photoshop cannot open the files. No previews in macOS.
I'm having no trouble with the new beta 9 and Photoshop CS5 now.
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Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« Last post by Nikon1 on October 16, 2018, 11:41:50 AM »
Thanks NiNeff for trying and Posting that.
I guess DDR is Right, too much noise.
If the Camera would be stupid cheap like around 100$, it would be worth try modify it and Cool the Sensor down really cold. that COULD help somewhat with the noise. But at that price point i wouldnt risk that.
I guess you CAN get something remotely "useable" form it in such low-Light-Long-Exposure Situations but nothing really super high Quality.
But since it is not intedended for anything like this, i am Not surprised at all with exposures that long.
.
Keep in mind that your usual DSLR or astro-CCD-Camera on the other hand canīt even remotely touch the 1000+++ fps of the Chronos but will perform Better in Low Light /Crazy Long exposure :)
There is an tool for every job!
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Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« Last post by NiNeff on October 16, 2018, 11:32:41 AM »
I did some tests now using 10 fps as the "long" exposure which is still really short compared to the usual seconds or minutes normally used for astrophotography or videos.
The Chronos is not suitable at all for this task.
See the attached still of the moon. The noise is not some sort of JPEG-artifact but inherent to the camera. I tried my best to let the cam warm up and did a black cal just before this shot.
Also, here's a really blurry video of mars taken also at 10 fps:
https://youtu.be/g-L_JynwLPc
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Software Dev / Re: Chronos V0.3.1 Beta
« Last post by Johnny on October 16, 2018, 09:57:06 AM »
Thanks so much for the excellent feedback! We've tried to fix the reported issues with an updated the beta, please see the first post for a link to the updated camUpdate-v0.3.1-beta-9-geb319ea.zip installer package. To give a brief description of what has changed since the beta-4 package:

Notable Features:
  - Redesign of the white balance window, including a new dialog to edit the color matrix.

Minutiae:
  - Add crosshairs to the white balance window.
  - Add Qt stylesheet to improve focus visibility.
  - Main window exposure now shown in microseconds and shutter angle.
  - Jog wheel now adjusts exposure logarithmically, or by degrees when pressed.
  - The 'close' button on the soft keyboard now applies the entered text.
  - Reorganization of the soft keyboard to include a negative key.

Fixed Bugs:
  - Black ares of the UI become transparent after an HDMI hotplug.
  - HDMI hotplug while on the playback window would revert to live display.
  - Add missing ColorMatrix1 and CalibrationIlluminant1 tags to CinemaDNG files.
  - Fix possible crash of the video system when aborting a file save.
  - Fix possible carsh of the UI when rapidly aborting and re-starting a file save.
  - Fix color correction math so that saturating the image sensor tends towards white.

Also, some bugs that were introduced in beta-4 but now fixed (not mentioned in changelog.txt):
  - Monochrome TIFF now pads the pixel values with least-significant zeroes.
  - H.264 bitrate setting was being ignored and defaulting to 0.25 bpp.

Is there something else missing from the CinemaDNG tags? Even Photoshop cannot open the files. No previews in macOS.
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