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Chronos User Discussion / Re: Introducing Chronos 2.1 HD!
« on: April 26, 2019, 01:47:52 PM »
Yup thread was somehow broken before, no I can fullfill my lust for reading new forum posts 
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77
Chronos User Discussion / Re: Introducing Chronos 2.1 HD!
« on: April 05, 2019, 02:14:48 PM »
Sounds and looks great. Nice to see some user-requested improvements.
Will the preorder include a lens or just the camera?
Will the preorder include a lens or just the camera?
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Chronos User Discussion / Re: Problem saving No storage device found
« on: April 03, 2019, 10:11:51 AM »I have forgot to insert the SD card several times, luckily only one shot was lost.Please don't do this, if it would block the recording. It's better to insert a storage device afterwards than loosing a shot because the recording got delayd/siterrupted/whatever by a popup warning!
Quick idea: a popup message if recording is started without an active storage device?
Instead maybe add an icon indicating if no storage is inserted
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Software Dev / Re: Software V0.3.1 full release
« on: April 01, 2019, 09:13:46 AM »
Great news, I will test it right now!
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Chronos User Discussion / Re: Problem saving No storage device found
« on: April 01, 2019, 09:13:24 AM »
Also as long as your video is still in memory and nothing else works you could use the HDMI output and capture it there somehow, if needed frame by frame.
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Chronos User Discussion / Re: First production shoot with the camera - notes/requests
« on: March 26, 2019, 09:16:51 AM »A big request for future firmware would be the ability to pinch and zoom on the screen to enlarge objects to make focusing a little easier, plus maybe a "temporary max exposure" button to brighten the image temporarily for focusing purposes without resetting the resolution/framerate.I second that! Great idea and it would be sooo handy!
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Software Dev / Re: Control the camera from a pc
« on: March 08, 2019, 02:01:01 AM »
Remote Control (From a PC or possibly any browser) is planned and will be available with one of the next sowtware updates, we just need to be patient and wait for the devs here
As for two cameras with a delay: have you tried to adjust the pre-trigger values on the second camera? It should work for the BNC input, but I'm not sure about the other ones.
As for two cameras with a delay: have you tried to adjust the pre-trigger values on the second camera? It should work for the BNC input, but I'm not sure about the other ones.
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Chronos User Discussion / Re: Time Stamps
« on: December 27, 2018, 02:55:55 PM »As far as I recall the timer changes depending on the trigger method which is used for the specific shot. You used the default variant where the trigger marks the end of the sequence and therefore the camera counts down towards the zero point, which was the trigger time. You could switch this around and the counter will count up as you'd expect.
BTW:
It would be nice, if the time stamp would show the time 0.000 (+ whatever exposure time you set) at frame number 1 and for the last frame +4.xxx sec for example. In the moment it shows minus 4.xxx seconds and goes to zero at the last frame. Just my personal opinion but... I would like it the other way.
For example: If I film something fast... like an explosion... And the action starts at second 2.986085 I can see that it would take for example 10 frames and end at second 3.032764 or so... So I can very quickly see that all this happend during roughly 0.05 seconds.
It's just a nicer more normal way (at least for my brain) to see something start at a positive time (or zero) and ends at a later time / bigger number instead of something starts at second minus 1,013915 and ends at second minus 0,967236.
However changing the trigger method just to affect the on-video counter would not be wise.
For now I suggest manual editing of the files if you need a different display (various examples of how to do this were already posted on the forums). In future versions of the camera software we should get more advanced options to specify what gets overlayed, maybe even a counter-direction setting.
I agree on the scale of the overlay. It should be added as extra on the lower resolutions.
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Chronos User Discussion / Re: Record Time
« on: December 20, 2018, 07:54:43 AM »
See page two of the spec sheet: https://www.krontech.ca/uploads/9/3/8/3/93836312/chronos_1.4_datasheet_rev_4.pdf
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Chronos User Discussion / Re: Bad Image Quality
« on: December 10, 2018, 10:57:27 AM »
Could you post a very small sample image or video of what you are experiencing? It might be easier to help you then. Also, try to do as Nikon1 said
Also: heres one of my very first videos: https://youtu.be/fsZ0ofxSuS4
Stock lenss(aperture opened as wide as possible), no settings changed, maybe not even black calibrated and a very cheap LED floodlight (similar to this one) You can see the light "flickering" as it actually changes intensity at about 50/60 or 100/120 Hz depending on design and your mains frequency.
If you can't get the image quality to be at least at that level, then there's most likely something wrong with your camera.
EDIT: here's a hint how much light you should have:
Also: heres one of my very first videos: https://youtu.be/fsZ0ofxSuS4
Stock lenss(aperture opened as wide as possible), no settings changed, maybe not even black calibrated and a very cheap LED floodlight (similar to this one) You can see the light "flickering" as it actually changes intensity at about 50/60 or 100/120 Hz depending on design and your mains frequency.
If you can't get the image quality to be at least at that level, then there's most likely something wrong with your camera.
EDIT: here's a hint how much light you should have:
As a rough estimate, for a color camera, you'll need about 7 lux per fps at f/2 and 360 degree shutter.
So at 4000fps, you'd need about 4000fps * 7 = 28,000 lux. If you want to run f/4, you'll need 4x as much light, so 110,000 lux which is about noon day sunlight
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Chronos User Discussion / Re: Question about Shutter Speed
« on: December 06, 2018, 11:32:09 AM »As far as i know, there is an Limitation on ANY Highspeed-Camera out there in the whole market, that the fastest shutterspeed must not be shorter than 1us.If there is such a legal speed limitation, it would most likely be due to ITAR. For example, thermal (IR) cameras are limited to be below 10 fps and/or 640 x 480 px to be exempt of ITA-regulations. So if you see any IR camera above those limits, the manufacturer got a specific permit from the US government to do so and the sales are very likely restricted to certain regions and so on.
There is some kind of limitation, and i was always interrested why that is... If it goes slightly faster than that on some of the Presets, i think its still kind of borderline ok for that.
If you want faster Shutterspeed, you need some kind of special permission and a good reason, why you would even need to have such a camera... (or just hack /Modify the firmware on your own...?)
.
Please dont quote me on that, this is just from what i heard other people say and as good as i could remember, i never did the acutal research myself.
.
I think i´ve seen someone of the Kron-Staff say here in the forum, that the chronos Camera itself ist capeable of way shorter/faster shutterspeeds per frame, but it is not enabled due to this (legal?) Limitation. If i remember correctly, the talk was about reducing the resolution to actually just a single Line of pixels at some kind of crazy framerate to create some kind of line-scan-camera. In such a mode the chronos should be able to push tons of frames (lines) per second...
#Edit: Sorry if Bad english BTW...
Now you might say what has this to do with equipment coming from countries other than the US (like Canada
)? Well they just claim world wide jurisdiction...I did not search for ITA-regulations regarding regular high-speed cameras, and honestly I don't want to dig into that rabbit-hole
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Software Dev / Re: Chronos V0.3.1 Beta - Updated Oct 15 2018 with beta-9
« on: October 24, 2018, 01:54:26 PM »re.yes but not a qt app. it will be a webinterface as I understand it
- Standalone daemon to operate the video system, with DBus API.
Does that mean we will get a QT app soon that runs on the PC to control the camera?
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Software Dev / Re: Chronos V0.3.1 Beta - Updated Oct 15 2018 with beta-9
« on: October 23, 2018, 10:42:50 AM »I am trying to update from 0.2, but it seems it can't find the update. When I try to backup the calibration data, it says "Error: no device is mounted to /media/sda" and if I try to update it says "No software update found".Seems like you are trying to update from a SD Card. This is not supported (yet).
In the Save settings it says the save Location is "/media/mmcblk1p1 (SD Card Partition 1)". I can save clips just fine to the card and they show up in the root directory.
The card was formatted in FAT32. The update file was extracted to the root of that card.
What am I doing wrong here?
You have to use the USB-Port on the side using a FAT32 formatted Stick. As mentioned above several users had issues so far. You might have to try more than one USB Stick.
Also: Don't try to use the USB-OTG port (the smaller one) – use the USB / E-SATA combined one instead.
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Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« on: October 18, 2018, 09:49:41 AM »
I was using Magnification in the sense most Binoculars are displaying it. But actually I don't quite know how that is specified then. Googling reveals "an object viewed through 10x magnification glasses appears 10x times closer" which is not the same as 10x larger one might think. Also I have a feeling there's quite a bit of marketing involved so not really a good measure.