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Messages - Simon

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Software Dev / Re: Chronos V0.4.0 Beta - Debian and Networking
« on: April 28, 2020, 10:09:51 PM »
Trying to find if I have the latest stable build installed - but can't see the matching between the downloadable images (e.g. chronos-voyager-20200410.img.xz) and the build number displayed in the About screen (0.4.0-beta38), nor anything in the List Packages screen, nor in tags in Github. What's the trick? Thanks.

Software Dev / Re: Chronos Cam App open source build discussion
« on: November 20, 2017, 11:54:56 PM »
That's great news and looking forward to trying it. I'm on Mint 17 which is based on the ubiquitous Ubuntu 14.04 so will let the forum know if all good.

Chronos User Discussion / Re: F-stop when using lenses from 35 mm camera
« on: October 07, 2017, 01:49:23 AM »
As far as how it looks to the sensor though, won't that 28 mm f/4 lens on a Chronos collect the same light (noise) and have the same depth of field as a 112mm f/16 lens on a 35mm? As in the resulting image taken on a 112mm f/16 on a 35mm body would look the same as a 28 mm f/4 lens on a Chronos?

Chronos User Discussion / Re: C moutn adapotor
« on: October 06, 2017, 10:01:08 PM »
I have a fotodiox C to EOS adapter and the same thing happened to me (and I freaked out until I saw the adjustment screw David talks of) that allowed me to rotate the lens.

Chronos User Discussion / Re: F-stop when using lenses from 35 mm camera
« on: October 06, 2017, 09:56:01 PM »
Hi - crop factor affects both focal length and f-stop - so f/4 on a 35 mm sensor will look like f/16 on the Chronos' sensor.

Chronos User Discussion / Re: Trigger by application
« on: September 26, 2017, 03:39:14 AM »
I (and possibly Tretee, another owner who's using the camera for a similar purpose) would like to be to able to save raw frames out to a network share for PC processing.

Chronos User Discussion / Re: Let's talk LENSES!
« on: July 15, 2017, 07:40:36 PM »
I'm hoping to get away with my Canon lenses - a 17-35/2.8L, 70-200/2.8L. 

Bought a Fotodiox C to EF adapter - nice quality. All I need now is the camera.

Also have a 17-85 Macro that was chucked in for free with a 2nd hand body I once bought because its electronics would fail and lock the body - glad I kept it.

I will be mainly analysing the strike of a golf ball and prelim calcs showed me the 17-35 will be good. The minimum focusing distance of 0.42m shouldn't change because of the crop, but the crop factor magnification is a godsend in making that golf ball occupy more pixels, so more accurate measurements can be taken.

Like ExaltedDuck, I believe the light gathering performance won't be affected by the crop - sure less total light will hit the sensor but each sensor pixel will still get the same exposure as it would have if the sensor was full frame.

I have done macro work before taping the 17-35 backwards to the 70-200, but depth of field is just too small for anything moving. I had the center of a fly's eye in focus, the outer parts way out of focus it is that small.

Software Dev / Re: GPL Source Code
« on: July 06, 2017, 05:15:40 AM »
Of all the open source projects I've been involved in, and that's a lot, I can't say I've ever come across someone keeping core improvements to themselves. It's of course in everyone's interest to advance the product. So I think you're imagining something that just doesn't happen.

There are plenty of cameras with this openness - including slow motion - the iPhone 6 & 7 the most notable with thousands of open, closed, free and paid apps modifying the camera. The Chronos simply gives the opportunity to write software on a camera with higher frame rates and/or resolutions. I definitely wouldn't have purchased it without access to the app development environment.

I'm talking substantial specialist apps in the camera when I talk about retaining source code; complicated image processing algorithms say for analyzing cell division or sports analysis, not simple apps like a color histogram which have no IP behind them, take a few hours to knock up and have general appeal.

Software Dev / Re: GPL Source Code
« on: July 05, 2017, 02:26:03 AM »
Yes, it goes without saying it's David's ultimate decision. Posts are always opinions - we're only here discussing considerations, and also learning in the process.

Anyone choosing to run a slowmotion youtube channel or blog is commercially benefiting from David's work if successful. They have paid $2500+ for David's work and are heavily advertising the camera, so much so David forwent the $2500+ for a bunch. So giving back I don't feel applies. Other sorts of commercial work - it's all a case by case thing.

A quick scan through Qt's licensing suggests David will have a Qt commercial license, so although some Qt libraries or third-party libraries will be GPL/LGPL, the actual app won't be GPL/LGPL.

LGPL still requires one to give access to the library and usage. Great for protection of algorithms, but still I wouldn't wish some commercial entity to freely use my work.

Similarly I totally agree with David not exposing his serious IP unless it's under appropriately secured and priced.

Software Dev / Re: GPL Source Code
« on: July 04, 2017, 07:41:05 AM »
For trivial mods that would take just as long to copy as to write from scratch - GPL no problem.

But for any app with serious IP, GPL discourages sharing with the community due to having to share the source code. That same IP I could be using in another commercial product, filing a patent for, or simply don't wish unscrupulous companies to discretely use in commercial products.

Apps with serious IP also have the capability of people specifically buying the camera because of the app.  Many of those apps won't happen if the source has to shared. Apps won't be freely offered if a MIT license or like has to be purchased.

Software Dev / Re: GPL Source Code
« on: July 02, 2017, 11:40:04 PM »
Oh, I didn't read your post properly. Sorry about that.

Software Dev / Re: GPL Source Code
« on: July 01, 2017, 05:06:21 PM »
Does anyone know where the part of the source that are GPL'ed are available anywhere yet for earlybird owner who have their cameras?

I hope it won't be GPL, but rather MIT - where did you read that, Ceriand?

The stretch goals Wifi dongle & Android live viewing will help a lot here too, as the more expensive smartphones have screens that are visible in strong sunlight. That's the problem with things like the sunshield - they only rid the brighter objects being reflected on the screen. Our pupils are still constricted outside unless we go the full drape over the head.

My eyesight sucks and I am wondering if anyone has tried to hook up an external monitor to their camera?   I film everything in bright sunlight and
it can be difficult for me to just verify if I have focus, etc.  ideal for each shot.

HSC seems to be quite pleased with the sunshade:

Chronos User Discussion / Re: 2nd battery
« on: June 19, 2017, 02:48:07 PM » found that particular battery had good life too - see

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