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Topics - rdemyan

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Chronos User Discussion / Heavy lenses
« on: January 22, 2021, 01:15:31 PM »
The Chronos 2.1 is heavy.  I want to attach a Nikon 80-200 mm F2.8 lens, which at almost 3 pounds is even heavier.  Based on weight, a tripod collar should be used on the lens which means that the 2.1 will be unsupported except at the screw threads between the camera nd the lens.

This sounds tenuous at best.  Any suggestions?

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Chronos User Discussion / Magnification changes as FPS changes
« on: December 09, 2020, 12:39:13 PM »
Can someone please help me understand how the magnification changes as the FPS changes. I think that a FPS setting of 1280 x 720 on the Chronos 2.1 color camera means that the frame is 1280 (pixels??) wide by 720 high.  Is my thinking here correct?

If I change it to 1280 x 240, then the image is magnified because the vertical  height is reduced.  Is that correct?  If correct, there should be a fair amount of magnification.  Is there any way to calculate the amount of magnification?

If I reduce the width from 1280 to say 640, then does that also increase the magnification in addition to any magnification increase due to decreasing the height?

I need to get a lot of magnification because I'm doing macro filming of sprays. Right now the extension tubes have the lens too close to the subject and it keeps getting very wet.

Any help is appreciated.

Thanks.

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Does anyone know why the color Chronos 2.1 won't show a live view if the analog gain is greater than 6 dB?

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Anyone know how to control the digital gain from the camera's webpage?  There is a way to control analog gain, but I haven't been able to find a way to control digital gain.

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Chronos User Discussion / Why the vertical color bands
« on: November 17, 2020, 01:14:27 PM »
Hi:

I'm starting to use my color Chronos 2.1 and I'm having trouble with  color vertical bands. The bands are much worse when I lower the exposure time.  Because I'm using the camera for scientific purposes, I need to use a low exposure time around 50 microseconds.  But I still get the bands at higher exposure times although not as strongly. Is there something I can do to get rid of these?

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Chronos User Discussion / Playing back high-speed video
« on: October 14, 2020, 12:32:56 PM »
Hi All:

I just got the Chronos 2.1 last week and it is pretty cool.  But if I film something say at around 5000 fps in .mp4 format, how do I play it back?  If I use something like AVS video editor, I can only slow the speed down to .05.  I'm not sure what the speed is then.  0.05 of what?  It does seem like the higher the filming fps, the slower, in a relative sense, it plays back at a specific speed setting in the desktop software.  Ultimately my question is, how can I tell people who view my video what speed they are actually seeing, because it doesn't seem to be the speed that the video was filmed in.

Thanks.

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Is it possible to have the Chronos 1.4 color version film in black and white by adjusting a setting on the camera itself?  Yes, I understand that the color version doesn't have quite the sensitivity or resolution as the monochrome version, just wondering if it is possible.

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Chronos User Discussion / Desktop software to playback chronos videos
« on: July 25, 2020, 05:13:17 PM »
I'm a complete newbie with video.  I just shot my first video with my Chronos 1.4.

I'm looking for easy to use desktop software which will playback the videos that I shoot.  I'm not sure how this works since there are many individual files in each of the folders.  So software which maybe allows me to select a folder and then the software will "play" all of the files at a selected speed?

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Chronos User Discussion / Static IP Address
« on: July 25, 2020, 08:02:49 AM »
I just received the 1.4 and am playing around with various aspects.  I would like to be able to use the web interface, however, out in the field I will not have an internet connection.

I thought that simply plugging the camera into the network connector of my computer would bring up the web page (after entering an IP address).  However, unlike a router, the IP address provided for the mini USB connection does not work when using a network cable.  Would assigning a static IP address solve this problem?  If so, how does one do that?

Also, has anyone run into the problem of attaching the camera to a computer running Windows 10 via a mini-USB causes Windows 10 to crash.  This has happened five times.  After Windows 10 restarts, the camera can be seen on the web page and operated from there.  However, if the connection is lost or a thumb drive plugged into the camera, Windows immediately crashes again.

With a network cable plugged into a router CONNECTED TO THE INTERNET, there are no crashes and the webpage readily comes up and is connected to the camera.  But I won't have an internet connection in the field.

Thanks for any help.

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Chronos User Discussion / Macro Video
« on: July 14, 2020, 08:30:27 PM »
I would like to do some macro work with  the monochrome version of the 1.4 (which I should receive any day now).

Will the following lens work?

computar C-Mount 13-130mm Varifocal Lens

Listings say that it is compatible with 1/2" cameras and uses a C-mount.  I assume the 1/2" is the sensor size, but I'm not sure.

Thanks.

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What is the sensor size of the 1.4 Monochrome version?

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Chronos User Discussion / Extracting still images
« on: April 25, 2020, 07:15:52 PM »
I am thinking about purchasing a Chronos camera.  I need super slow motion video, but I also need 1 microsecond still images.  I have emailed Sebastian at Kron and he replied as follows:

"I think the best method of extracting a still image from the camera is by saving the file as cinemaDNG.  This will create a folder on your card containing a number of still adobe dng images that can be opened as a single image in your preferred photo post processing software or as a video sequence in your preferred NLE software by importing the whole folder.

One note when saving cinemaDNG files on the camera, they are much more data heavy (h.264 is up to 60Mbps, cinemaDNG is 1258Mbps) and the save time will be much longer.  I recommend using a SSD if you wish to save cinemaDNG files since the transfer rate is much faster than the SD card."

Has anyone tried this?  How good is the resolution of the image.  Another choice I have is to try  to buy a Vela One flash (as low as 0.5 microsecond), but they are not producing flash units at the moment.  I feel confident that the Vela one will provide a very good image, but I thought I should maybe consider the Kron cameras since I would like to have super slo mo video as well.

Any advice is appreciated.  Thanks.

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