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Topics - clkdiv

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I need the Shutter signal of the camera to sync some external gear to the camera, but the sync shall only run while the camera records. As far as I can see the "shutter" signal runs all the time, also when NOT recording? Is there a way to achieve what I need? Thanks!



I don't understand the segmented mode together with "disable ring buffer". I would like to record e.g. exactly 1000 frames then automatically stop recording. For that I set Record Mode to "Segmented", Record Length to 1000 frames, Number of Segments to 1. The display now show "Segmented size 1000 frames.

Now I thought camera would start recording to the one and only segment and then, when buufer is filled, stop recording, because "disable ringbuffer" is checked. But instead the camera records and records until I stop recording, still "ringing" the buffer.

What am I doing wrong here?

Thank you so much!

Software Dev / How to communicate with the camera via C#
« on: February 13, 2022, 02:51:51 PM »
Hello nice girls and guys and so on...

I need to automatically download frames from my Chronos 2.1 and also maybe want to set some adjustments. Now I know there is the web interface, but I would like to code it in C#.

Now I wonder what`s the best way to go? I suppose I would have to talk via REST API? If so, can anyone give me a hint where to start, or did anyone ever talk to the camera in such a way and have a snippet of code for me to start with?



Chronos User Discussion / Can't find the 2.1 LUT thread, please help!
« on: January 19, 2022, 02:07:21 AM »
Hello, I remember that there was a LUT table for the chronos 2.1 posted here somewhere. SInce I don't have a color chart, I would like to try with that.

Can someone point me to the thread, I can't find it.

Thanks a lot! Martin

today I wanted to try a resolution I never tried before and I could not make it work. I tried 832x456 @ 5682 fps and got some really ugly fast moving stripes at the left side of the display, which appear in the footage too. After fiddling a while it turned out that all of the resolutions with 832 width have the same problem.

I attached three of the recorded frames, the stripes are visible in each frame. The problem appears only at this resolution. Restart, black calibration and changing gain won't change anything...

Do you encounter this on your 2.1 too? Help is really appreciated. Thanks! Martin...

General high-speed discussion / Upscaling footage
« on: July 12, 2021, 03:27:30 PM »

now that I got the sweet spots for my camera (thanks to mklinger) I tried higher frame rates to see whether the footage afterwards can be upscaled without becoming ugly.

So I tried some different approaches, but in the end I came up with two workflows that might work. Maybe this is of use for somebody, so:

1. Using Adobe camera RAWs new feature "Super Resolution", which will convert an existing DNG into a new DNG with twice the resolution while keeping the RAW data intact. Actually it bakes the upscaling recipe into the DNG. So one doesn't loose the overhead from the RAW. Unfortunately only Adobe Software can deal with theses enhanced DNGs. When scaling up a 1152x648 frame to 2304x1296, the "enhanced" DNG can be read with DaVinci, but it stays at 1152x648. So going the Adobe way the workflow is a) grade and enhance (new super resolution) the DNGs e.g. from within Lightroom, then b) export these enhanced DNGs from Lightroom as 1920x1080 TIFF sequence.

2. Grade and export the DNGs from within Lightroom without "super resolution" to TIFF, then let e.g. Topaz Gigapixel AI do its job upscaling to 1920x1080.

I attached a PSD with three layers: one from Gigapixel, one from Lightroom Super Resolution, and one from the original  DNG to TIFF without scaling. Although Gigapixel is a somewhat over the top with sharpening, I will stick to it.

There is something to mention, too: The "Enhance Photo" function does a very good job on Moiré. Look at 200% at the roof in the background, there were no vertical roof joints, it is Moiré! GigaPixel simply enlarges it, while "Enhance photo" addresses it quite well. So maybe even when using GigaPixel or equivalents for upscaling, you might want to use Adobe Camera Raws "enhance photo" additionally before exporting.

Have fun!

Software Dev / Feature request: Toggle Input for IO2
« on: July 03, 2021, 12:56:59 AM »
Hello, I wonder if it was possible to get a toggle function for IO2. At the moment this is available only at IO1, BNC, this makes a setup unnecessary clumsy.


General high-speed discussion / Fixed pattern noise removal
« on: June 20, 2021, 02:05:40 PM »

I wonder if someone has some tips to get rid of fixed pattern noise, anyone having a good worklflow?


Hello girls and guys.

I succeeded making the camera map a shared SMB folder on my notebook. But I wonder, if it is possible also to do this the other way round? Make the Notebook map a storage at the camera?


Also: The card for the OS has two partitions: A very small one with some boot stuff on it, and a  big one I can't access from within windows 10. Anyone knowing how to access the larger partition, when having the card in the card reader?


Hello, thanks for reading this.

The record mode called "live slow motion" would be useful for me, but only if it could be triggered by either an external trigger or the web interface. Both is not working. Only the "real" red record button allows using this mode. Is there anything I can do about that?

And, btw., same thing with the "live record mode" that automatically records h264 @ 60 fps additionally to the slow motion. That would be useful too...

Thanks. Martin.

Hello, today i recognized a strange ghost shadow caused by a bright object within the frame. I shot a clip where water drops move towards the camera and sometimes the bright sun makes the drop burn out to pure white. That's normal. But every time such bright drop passes the cameras view, the drop causes a ghost shadow. See the attached clip, please.

Does anyone know whats going on there?

Actually I recognized this before when I had a scenery with strong contrast: At the left side of the image I had some trees and at the right side a bright sky with a meadow beneath. So the lower half of the image was more or less evenly lit, trees to the left, meadow to the right.  But the upper half of the image had much more dynamic range: at the upper left the trees (dark) and at the upper right the bright sky. This strong contrast caused the upper half of the trees being much darker than their lower half, the trees were completely unevenly lit.

On my Chronos 2.1 I would like to grab the Frame Sync Output at the BNC to feed it into an Arduino. For visual feedback, I tried very slow 3 fps on the Chronos to toggle an LED.

But the output of the Chronos is always high, it simply is closed and doesn't do anything. Someone any advice?


Hello nice girls and guys and in-betweens...

I am running a 2.1 color and wonder if there is any chance to have a histogram? While searching, i remember the some months ago released software with a more modern GUI, as mentioned here. Did that have a histogram?

And another question: Is it possible to have a crosshair on the screen to align the camera as good as possible?

Thanks! Martin

Chronos User Discussion / FFPMEG: Fastest conversion of DNG to MP4
« on: November 08, 2020, 06:55:21 AM »
Hello! I am shooting in RAW and tried to convert the RAWs to H264/MP4. Now FFMPEG is really fast on that: On my old I7 with 6 cores it converts with 55fps. This is because it uses the GPU.

Unfortunately the output is dark and greenish, but at least I have a fast glance of what happened while recording.

When converting the DNG to TIFF first and then putting them together into a MP4, everything is "normal": White balance, colors, black level.

Does anyone have any experience converting DNGs directly into a video using the GPU?

Thanks! Martin

Chronos User Discussion / Saving over network: Speed question/issue
« on: October 23, 2020, 08:48:57 AM »
Hello nice girls and guys.

Just a quick question: I am shooting quite much with my 2.1 and it would be nice to have the camera save as fast as possible over network (smb). I wonder if it is possible to make that as fast as to eSata/SSD, which I also have connected? Where are the limitations?


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