Messages

121

Chronos User Discussion / Re: Chronos 1.4 Footage Thread

« on: May 10, 2022, 06:59:54 AM »

Lowest officially supported Framerate on any Resolution is 60fps.
 It DOES allow you to go way lower than that, but it gets really unstable, and unreliable, also Image Quality gets very bad at anything lower than 30 or 20 fps usually, and Black-Calibration stops working at certain settings, or just wont work at all for really low Framerates.  Lowest Framerate i been able to capture anything worth showing to anyone with was 5fps on the Chronos 2.1, but that shot had to be HEAVILY edited to look like that (not really useful in Real Life, but i like to know and Test the Hard and Soft Limits of my Gear anyways, even if it gets a bit Ridiculous at times; Especially with a Camera that lets you set just whatever Framerate you want basically. Software Limits you to 1.00fps as a minimum, if i recall correctly though, but it gets basically unusable way before you would even get that far, so that is a fair Limit. As Said Earlier, officially supported is anything at 60 or more Frames A Second up to the Maximum Framerate Limit, the Camera Sets According to your Set Resolution.).
 See: https://forum.krontech.ca/index.php?topic=597.0
 for that.
 Anything between 1000fps and like 240fps (which quite a bunch of Mainstream Cameras can shoot in HD or better these Days) is however very usable, and good to have for things, that just look too slow or boring in full 1kfps or more; or where Light is limited, it can allow you to increase the Exposure time per Frame just enough to still get a very high Quality Image.

122

General high-speed discussion / Re: DNG Raw Chronos 2.1-HD

« on: May 06, 2022, 03:23:26 PM »

Kein Problem, gern geschehen. Viel Spass damit und viel Erfolg!

123

Chronos User Discussion / Re: Poll - Please Vote: Which Lens Mounts do you want for the Chronos?

« on: May 06, 2022, 03:22:18 PM »

Been almost a Year now, voting and this Thread will be closed on 12th of May. So, if you want put a vote until then, as long as you still can.

124

Chronos User Discussion / Re: Resolution other than in manual

« on: May 06, 2022, 03:17:26 PM »

 [...] 1 Mio fps thread.
 [...]
 

 *100k.
 A Million would be a bit optimistic for the Chronos.
 Though the 1.4 sensor can in Theory do some very high Framerates ( https://forum.krontech.ca/index.php?topic=94.0 ), 1 Million FPS is currently only possible on very few Cameras on the Market (very much Upper Price Bracket of Highspeed-Cameras)

125

Chronos User Discussion / Re: Resolution other than in manual

« on: May 01, 2022, 06:12:13 AM »

Pretty much this Question has already been discussed here:
 https://forum.krontech.ca/index.php?topic=661.msg4594#msg4594
 .
 While you can set custom Resolutions, like written here, if anything you would want to reduce the Vertical Resolution below 96px Height, as you probably wont gain any more maximum Possible Framerate from lowering the Horizontal Resolution.
 The 2.1 Sensor itself, According to Datasheet Should be capable of doing quite a bit higher Framerates than the Current Firmware with the Preset Resolutions would allow, but i have not yet seen someone Reporting he got it to work.
 For the 1.4, there is a Workaround/ Firmware Mod described in the Linked Post above, but for the 2.1, you would probably need to do a bit more work on your own on the Firmware.
 I am not able to do that and also lack the Time to figure out how to do that, and still waiting myself for someone to post some detailed steps to follow, to get higher FPS on the 2.1.
 If you are able to get something to work, please post in the Post above, would help a bunch of people out, i assume.

126

Chronos User Discussion / Re: Post Chronos 2.1 clips here!

« on: May 01, 2022, 12:40:17 AM »

Uploaded a DNG Sequence of some Length here a While ago (210 RAW Frames Straight out of Camera, including 1 Shot from a Color Checker for Color Reference), but will delete them soon. So, if anyone is interested in downloading them, do so soon, otherwise they are gone.
 Can be found here:
 https://forum.krontech.ca/index.php?topic=734.msg5143#msg5143

127

General high-speed discussion / Re: DNG Raw Chronos 2.1-HD

« on: May 01, 2022, 12:34:16 AM »

@ivandan: Hi there, u still alive? Been more than 6 Weeks since i posted the DNGs, still got no answer, if you where able to download them yet. Will Delete sometime soon, if i dont hear anything back.

128

Chronos User Discussion / Re: Boot failure after OS update

« on: May 01, 2022, 12:29:18 AM »

in that case i would try to contact [email protected] about the issue, see what they say. But if urgent, you will usually get to them quicker, if you just give them a Call while their Business Hours:
 https://www.krontech.ca/contact-us
 Can sometimes take quite a bit until they answer mails for some Reason, but you usually reach them fairly well on the Phone, i heard.

129

Chronos User Discussion / Re: USB otg Ethernet support

« on: May 01, 2022, 12:21:07 AM »

@stumask:
 Hi, could you provide any more info to how it is connected exactly (i assume Ethernet via some Router to an internal Ethernet Port on the PC?), PC Hardware/ OS and what Browser you are using?
 Could very well be a Problem with using some kind of very outdated Browser Version or something.  I dont know about anyone actually reporting any kind of similar Issue caused by an old Browser Version with this camera, but seen Plenty Problems with some Websites personally when used with old Versions of some Browsers, which are no longer Supported or lacked some needed Features for the Webpages to work properly.
 .
 Screenshots would also help in figuring out, what is going on, i guess.

130

Chronos User Discussion / Re: Sigma 600mm Lens On Chronos

« on: April 26, 2022, 03:43:02 PM »

@Nikon1 I wonder if utilizing a tilt shift adapter would help increase DOF?

you mean on the Mirror Lens or on my 100-500 Zoom?

131

Chronos User Discussion / Re: Long-term sustained capture (1TB of data) to SB or and network?

« on: April 24, 2022, 01:07:36 PM »

Probably a good Idea to get a Capture Card that does MJPG output for this Application (intraframe-only compression. see: https://en.wikipedia.org/wiki/Motion_JPEG ), as H.264 and such are all interframe Compressed, and would very likely Cause you a lot of Trouble with Analysis of small, fast Moving Particles. HDMI should only Compress the Color Space, and MJPG would then add a Layer of JPG Compression to every Frame, but Given High Enough Bitrate Output of the Capture Card, that should be very High Quality Footage Output.

132

Chronos User Discussion / Re: Long-term sustained capture (1TB of data) to SB or and network?

« on: April 24, 2022, 12:49:08 PM »

Have you had a Look at the "Live Slow Motion" Record Mode yet?
 [see Page 76 of the Manual: https://www.krontech.ca/wp-content/uploads/2021/09/RE-PDEV-10009-Chronos-User-Manual-Full-Software-Version-0.7.0.pdf ]
 If "Playback Loop Time (seconds)" is Set to "60" and "Playback Rate (fps)" is set to"60"; "Loop Record Mode" to "Continuous", that would allow you to Record 3600frames of Highspeed Footage every Minute and Play it Back over HDMI until it starts to record another Short bit of Footage a Minute Later, and so on, will work indefinitely as long as the Camera has Power.
 If you set the Resolution to 640x360px on the 2.1; that would allow you to capture a Short bit of Highspeed Footage at 7135fps, and output it over HDMI until it Captures again every Minute. That would be a bit more than a Half Second worth of Highspeed-Footage every Minute.
 Only thing you would need additionally would be Some HDMI Capture Card, that can Keep up with FullHD and 60fps, which most should be able to do.  About as Close to your Requirements as you are Going to get with the Chronos i assume, and that should give you a Reading for Whatever Measurements/Analysis you are going to do, and you can also Record the HDMI from the Capture Card to Permanent Storage, to just look at the Footage Later on, that would result in 8 Hours of Footage for 8 Hours of Analysis/ Run-Time.
 Only Drawbacks i see, is that you need to figure out how to tell the Analysis Software you are running; whenever the Jumpcut to the Footage that is Played back via HDMI is, which is Recorded a Minute Later, to get Accurate Datapoints (Could also just set a timer that goes off every Minute in Software, and Trigger the Start of that Timer approximately on your own, then Just dont use a bunch of the Frames when it Jumps, to allow for some Timing Error between you hitting the Trigger and the Actual thing).
 Also, that would be Compressed Footage to some Degree (HDMI Output is not bad Quality Though. For Sure not as good as good as Straight DNG-Output, but could be enough for your Application? idk, never ran Real Time Image Analysis myself...).
 .
 If thats Your Requirements, i would at least Try that, HDMI-Capture Cards are really affordable and you could even play around with the Playback Loop time to get a Readout / Data-Point every 30 Seconds or something else.

133

Chronos User Discussion / Re: Long-term sustained capture (1TB of data) to SB or and network?

« on: April 20, 2022, 06:50:11 PM »

Thinking about this, this Freefly Camera came back to my mind ( https://freeflysystems.com/wave ), cause still way cheaper than the Other Cameras i Mentioned.
 That one does Sustained Recordings directly to NVME SSDs. Minimum Horizontal Resolution is 2048px Wide, and at Image Height of 160fps, you would be able to Capture 7861fps, Record Time Limited only by SSD Size, according to them.
 But still, if my Math is right, that would only give you about 27,7 Minutes of Recording Time for a 1TB Big SSD and a bit less then an Full Hour on a 2TB SSD. Pretty Limited Resolution Settings on that Camera. To be Fair, that is pretty impressive just in Terms of Pixel Throughput directly to Permanent Storage alone (Most Consumer Cameras wont even Shoot 30 or More Minutes of Continuous Video in 60fps because of Legal Limitations), but still far from the 8 Hours you are trying to Shoot in a Single Shot. They Quote a Price of 12,1k$ on their Site, which would be worth at least looking at in my Opinion, if you really Consider Getting something like that. Not Really Long Term Sustainable Recordings though, but at least somewhat Sustained for like an Hour or Two, given that Camera would even work with 4TB SSDs (Which i am not sure about, from a quick look, they do only Mention 2TB SSDs on the Specifications, but did no detailed Research on that. Do some Research your own, before you Buy!).

134

Chronos User Discussion / Re: Long-term sustained capture (1TB of data) to SB or and network?

« on: April 20, 2022, 03:11:23 PM »

Apart from Asking myself whatever you would even do with 10,8 BILLION FRAMES (=about 13,9 Years Playback time at 25fps...?) worth of Footage (50 Days worth of 8 Hours per Day of 7500fps Footage), i can only agree with mklinger.
 The Chronos (and most other "Classical" Digital Highspeed-Cameras) Are not even Remotely Able to keep up with more than a Few Seconds or at best Minutes at a time Sustained Capture at Framerates of 7500fps.
 Thats Mainly because there Needs to be Plenty Of Real-Time Processing to be done to even be able to pull all That Data from the Sensor and put it somewhere it could be read from later on.
 Usually on most Highspeed-Cameras this is solved by just doing absolutely minimal Processing to the Data, and basically just dump Raw Sensor Data on the Fastest Memory you could fit in there for Reasonable Money.
 The Amount of RAM in the Camera itself is then usually also what limits your Recording Time. On the Chronos 2.1, Thats 8 to 32 GB, depending on Configuration.
 Streaming Video via Network or A Live View Video via HDMI on this Camera is only meant as a Preview, and will always be compressed, and very Limited Framerate, as it is just not possible to Push that Amount of Data via a Usual HDMI or Ethernet Connection.
 Streaming that Framerate to Memory would be Highly Limited by Processing Power and Speed of the Memory, and Processing Power on the Chronos Cameras is Fairly Limited, for one, they Try to make affordable Highspeed-Cameras at Krontech, also the Cameras are Limited in Space and Power Consumption.
 .
 So in Short, not even Remotely close to ever happen on a Chronos 2.1 Camera, and the Majority of Highspeed-Cameras with comparable Specifications.
 .
 If you for some weird Reason actually need to get this done the Way you described, and really capture Continous 8 Full Hours 7500fps Footage per Day for two Month in a Row, you need a Completely Different Beast of a Camera.
 What you then need are Highspeed-Cameras Specifically designed to STREAM the Footage Uncompressed.
 Those work Completely Different from the Kind of Highspeed-Camera the Chronos is, as they are Plugged directly into the PCI-e Slot of a Very Powerful Desktop Computer (or any other Connection that is able to Carry the Needed Amounts of Data on a minimal Processing Overhead), which takes Care of Processing all the Data, and Writing it to Permanent Storage, like a Fast SSD. The Camera or rather Sensor Unit in this Case, Just Throws RAW Sensor Data at the Computer, without any much Further Processing or saving.
 This Can also be done with Frame-Grabbers using Camera-Link on some Cameras or other Systems, but as far as i know, the current highest Performance Systems in this Direction Just Streaming the Uncompressed Sensor Data to Proprietary PCI-e Cards, and Basically make a Sensor unit and a Full Desktop-Computer into a Camera.
 These can then record as long as there is Free RAM on the PC, or until your SSD is full, Depending on whatever you end up getting (there are Computers with more Than 1TB of RAM around these days) and what you decide to save the Footage to.
 These Kinds of Highspeed-Cameras however are also a Way different Ballpark in terms of Price. Was Hands on with some of those, and was able to Play around a bit, and its Pretty crazy what they are Capable of, but a bit out of my League, not only in terms of what i actually need (Would be nice to have for sure, but not worth or practical having to use a full PC and a Fat Mains Power Supply all the Time for me), but also Budget.
 .
 In case, you are actually considering to get something like this, the ones i know of here, might help you to get Started in looking for something that fits your needs, or maybe those are even something you would buy (did no in depth Research about what Exact Framerates and Resolutions these are able to Stream Maximum, but its about the Direction you are talking. Prices on Request only for Cameras Like this, also dont forget, that you will need a Dedicated High-End Computer to Run those usually, no internal Screen and no internal Batteries):
 .
 https://www.imaging-solutions.de/XSM.html
 https://www.imaging-solutions.de/OS.html
 (Had some Years ago Tested the Os 7 and one of the XStream Cameras Personally, and they actually Recommended me looking at the Chronos 1.4 (when the 2.1 wasnt released yet), ended up getting a 2.1, Which fits my needs pretty well.)
 Similar Product, i have not Tested or seen Personally:
 https://idtvision.com/products/cameras/xs-series-cameras/
 .
 .
 And Again, i dont know what you are trying to do, but also consider, that even if you had such a Camera including a PC to Run it, and enough Space on a Disk to Capture all that Length of Highspeed-Footage, that you then also need to Somehow Process all those Files.
 In my Opinion, it would be way Easier (also worlds Cheaper) if you tried to find a way to get away with just capturing small Sequences of those 8Hours you actually needed, which Probably would easily be Possible on the 2.1 as is. Also Much less Footage to Deal With and Store just overall. If you for some Reason have no way around capturing the Full 8 Hours in one Sitting at 7500fps, getting a way higher End and much more Specialized Camera would be pretty much the Only way to go, apart from some even more expensive and Intense Projects like mklinger Mentioned, of Syncing up some crazy Number of Cameras somehow (needs Lenses for each Camera also, not even talking about Mounting and Cables and a Way to control the Whole Rig, which is not just way more Work and needs a ton of Space, but would pretty sure also cost more than a Single Specialized Camera for described use-case).

135

Chronos User Discussion / Re: Sigma 600mm Lens On Chronos

« on: April 17, 2022, 10:53:20 AM »

I got a Exakta 100-500mm 5.6-8 for like 30 to 40€ incl. Shipping, a Converter to Nikon (native Canon FD-Mount), and a 3x Teleconverter some Years ago, because it was Aparently Broken according to Seller (which is really was not, pretty good working Condition).
 .
 Its Acceptably sharp on my D500, but certainly good enough for the Chronos 2.1 Resolution. Like Solscud007 with his Mirror Lens, i absolutely wont complain for the Price i got it for. Has served me Well, when i needed it, and so far has Performed well enough that i could not justify replacing it with something more Modern.
 .
 Was Thinking about getting something like those new 50-500mm or 150-600mm Lenses, but Price is way too much for how much use / Improvement over what i already have, i would get out of it (use that Range of Focal Length somewhat rarely in comparison to all my other Lenses), and they are also pretty bulky and Heavy in Comparison to carry around every Day. The Exakta i have is still far larger than a 500 or 600mm Mirror Lens, but for being a Zoom, its reasonably Compact. 75mm Diameter; 250mm Long (will extend up to 340mm long at full Zoom and close Focus); 1490g. very Comparable to a 70-200mm 2.8 DSLR Lens in Weight and Size, bit longer but Slimer.
 .
 Just looked up the Price these Currently go for, and seems like ~250 to 300€; which i am not too sure about, if i would have bought it at that Price. Up to 100€ pretty sure; up to 200, maybe if i Specifically Liked it for some Reason, but at 300 or more, i personally would probably have considered getting one of the earlier Mentioned Long Range Super-Tele-Zooms instead used, as its not much more money spend from there and much Sharper, also Faster Aperture.
 .
 Have to Say though, Zoom is pretty nice to have on such long Lenses, but much more Bulky and annoying To carry Around than a nice Mirror Tele.