Recent Posts

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91
Chronos User Discussion / Re: Lens/Camera protection
« Last post by tesla500 on April 17, 2018, 12:49:25 AM »
Hi Andrew,

I've had good luck Lexan and Acrylic. The biggest problem I've found is that it gets charged up with static electricity and readily attracts dust. Other than that, it is perfectly clear as long as it has the protective coating intact. Also, watch out for reflections, best not to have any light coming from behind the camera that could reflect off the shield and into the lens.

David
92
Chronos User Discussion / Lens/Camera protection
« Last post by ahaponek on April 16, 2018, 08:17:06 AM »
Hi all,

I'm going to be capturing some footage of scientific testing, and the client is using a BBs as the projectiles. I know these have a tendency to ricochet, so I am in the market for a way to protect the camera from things like projectiles, and small particles. Anyone know of anything out there?

I am using canon glass with the camera, so anything that fits the lenses exactly would be great (mostly worried about the front element). I initially thought a UV filter, but I'm not sure that would do much in a 'rouge-BB' scenario. I am open to other options.

I believe Mythbusters used LEXAN polycarbonate, but I have no experience with it. How would the clarity and image quality be shooting through it?

Do I just shoot with a telephoto and get as far away as I can? Would love to stick with my higher speed primes if possible, and I find a shorter focal length to be a bit more visually interesting.

Any other ideas?

Cheers!
Andrew
93
Software Dev / Re: Deploying camApp from Qt Creator
« Last post by Matom on April 15, 2018, 11:52:46 PM »
Dear David,

Thanks for your answer. I spent the last few weeks trying to understand how the pipelines work. And I agree that the learning curve is quite steep ;) I have the live image (8 bit/per pixel version) from the OMX pipeline now. So far, I did not manage to configure the Gstreamer pipeline.

Do you have a flowchart of the software? It would be a great help to see how the pipelines are connected and how the image is transported from the sensor to the screen.
94
Chronos User Discussion / Re: Anyone from Berlin?
« Last post by feklee on April 14, 2018, 11:57:51 PM »
No success so far.  :'(

Nobody from Berlin here?
95
Chronos User Discussion / Re: Chronos 1.4 RAW conversion tool - pyraw2dng
« Last post by tesla500 on April 12, 2018, 01:00:25 AM »
Hi Laura,

Try converting the raw file to DNG using the tool, DNG is just a specialized form of TIFF, image editors may be able to open the DNG as a monochrome 16-bit TIFF.

David
96
Chronos User Discussion / 5V TTL triggering circuit
« Last post by pstest on April 11, 2018, 01:44:54 PM »
Can the forum provide a circuit schematic or description for an external 5V TTL triggering circuit that has been I/F'ed between camera and PC?
If a S/W approach is available, please advise?
97
The event may have been brief if using Triggering Exposure where pulse duration is 1/frame rate.
Check the frequency of your TTL signal so < frame rate.
98
Chronos User Discussion / Re: transfer video to computer via code
« Last post by pstest on April 11, 2018, 01:38:01 PM »
David,
Can you also provide me with the script that monitors card for file update and then transfers file through network to PC?
Thank you,
pstest
99
Chronos User Discussion / Re: Chronos 1.4 RAW conversion tool - pyraw2dng
« Last post by lcombs on April 11, 2018, 06:30:30 AM »
Hi,
 
So happy with the camera update and the raw files we have now! For what we are working on though, we need BMP files...does anyone have any suggestions on conversion or any other ideas on how we could get there? Even a code in python or something?

Thank you :)

Laura
100
Chronos User Discussion / Re: Chronos 1.4 RAW conversion tool - pyraw2dng
« Last post by JamesB on April 10, 2018, 01:18:02 PM »
Great news, also would love to get the compressed RAW converter option soon as I have a list of clips that are just sitting there. It also makes for faster storage in the field, regular RAW just eats up cards for lunch. 

I am very happy with the RAW quality and after using it, H.264, as it is right now, is not worth it even for the speed.  Also with proper and often black calibration, most banding is taken care of.   

A 10-bit version of H.265 or a 4:2:2 H.264 variant with better demosaic algo would make this amazing for speed and quality. 

It would also be so cool if we could have a daylight balance preset for the WB. Maybe be able to save a previous WB in a file as balancing every time is an extra step.  Most of us either shoot in our studio or outside needing only 2 WB presets.  For a later build of course.   Great job so far David!
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