Messages

91

Chronos User Discussion / Re: Chronos 1.4 Footage Thread

« on: July 07, 2017, 06:45:55 AM »

Getting enough light is still an issue for me but the ping pong ball thing is on my short term list of things to do. I'm going to try to fire it this weekend a couple of times.

92

Chronos User Discussion / Re: Chronos 1.4 Footage Thread

« on: July 06, 2017, 03:21:32 PM »

How fast is Mach 1.3? Faster than a balloon: http://i.imgur.com/dATXGY4.gifv

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Chronos User Discussion / Re: Chronos 1.4 Footage Thread

« on: July 04, 2017, 06:35:05 PM »

I don't have any "video" but I do have a couple of GIFs http://imgur.com/a/glvVr

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Chronos User Discussion / Re: List of good (and bad) SD cards

« on: July 03, 2017, 01:55:54 PM »

I have been using a "SanDisk Ultra Fit 128GB USB 3.0 Flash Drive (SDCZ43-128G-G46)" almost exclusively and out of a hundred recording I have only had a couple write failures but they may have been related to what I was doing (still trying to figure d a way to replicate the problem). Otherwise it's very fast and the slim form factor makes it very convenient.

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Software Dev / Re: "Missing" the out point when saving.

« on: June 24, 2017, 05:08:17 AM »

Awesome, thanks for the info. I am using a "SanDisk Ultra Fit 128GB USB 3.0 Flash Drive (SDCZ43-128G-G46)" which has been working well until now but I do have a bunch of non-Chonos crap on the disk as well. I'll see if clearing it out makes a difference.

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Software Dev / "Missing" the out point when saving.

« on: June 23, 2017, 01:08:45 PM »

When saving files I have had the camera miss the Mark Out point a couple of times.

I set my in and out, set 30fps for the output file frame rate and then hit save, the camera goes through its saving sequence but it passes the Mark Out point and if I am not paying attention it will wrap around back to the beginning of the recording (see image below). Aborting after the camera has passed the out point causes it to become unresponsive (I haven't caught it before wrapping around yet), powering off then on gets it going again. The saved file is unplayable in VLC  (I haven't tried any creative methods of extracting frames).

Has any one else seen this behavior?

Passed the Out and wrapped around: http://i.imgur.com/rjJjoKZ.jpg
Note the Current frame, Mark In and Mark Out.

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Chronos User Discussion / Re: Chronos 1.4 Footage Thread

« on: June 20, 2017, 08:20:14 PM »

All three of these shots were with a 135mm f2.8 from the 70's. The softness in the first two is from having the aperture wide open and having a lot of glare from behind and beside the subject. The last clip shows off how sharp the Chronos 1.4 can be with the right lenses and lighting. Thanks David!


https://youtu.be/nwI2mGTo_gk

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Chronos User Discussion / Re: Chronos 1.4 Footage Thread

« on: June 20, 2017, 03:41:37 PM »

Video card that had an odd failure, causing it to catch fire on power-on

https://www.youtube.com/watch?v=MbCxC5N2mQM

I wonder if it is related to https://en.wikipedia.org/wiki/Halt_and_Catch_Fire.

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Chronos User Discussion / Re: Chronos 1.4 Footage Thread

« on: June 18, 2017, 07:57:57 AM »

I haven't seen any steady lines like those shown above but occasionally I have seen light/dark bands that will move vertically as the exposure time is adjusted. I'm not sure if they are associated with any particular resolution or frame rate but I'll see if I can reproduce it.

How about some electrical arcs crawling across and through wood:
http://i.imgur.com/zp64MPy.gifv
http://i.imgur.com/IfF5Kxe.gifv

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Chronos User Discussion / Re: Spotting

« on: June 09, 2017, 06:02:47 AM »

Out of curiosity, is it always the same pattern (a sensor fingerprint), if so you might be able to map them for your particular camera and make an adjustment mask that lets you make a quick and rough correction.

101

Chronos User Discussion / Re: Chronos 1.4c Remote Trigger Recommendations?

« on: June 04, 2017, 03:01:20 PM »

It looks like you would need an adapter to connect the 2 male 3.5mm jacks together. That trigger also looks to be the half-press/full-press type, depending on the pin-out it may trigger your Chronos on the half press rather than the full press (if that is an issue).

If you don't mind a little DIY you can make your own for under $20. I used a normally open push button, male BNC connector and a small project box. http://i.imgur.com/J9brdF7.jpg
There are commercially available BNC buttons out there but they tend to be expensive because they are intended for "professional" equipment, if they sold for less they wouldn't be professional enough.

Good luck!

102

Software Dev / Re: Initial feedback

« on: June 02, 2017, 07:13:47 AM »

I wanted to start by saying thank you, your camera is awesome! Better than the commercial system I have played with in the past as well as my old Casio.

I agree with most of the suggestions above and so won't repeat them. The one thing I think would be helpful to all user is an exposure histogram. I have been exposing as bright as possible then lowering untill there is no clipping but a histogram would make proper exposure a lot easier.

Other than that I had some jumpy footage but like your guide said it is likely related to my SD card and having bitrate set too high.

Thanks again!

103

General high-speed discussion / Re: First shots with the early bird camera!

« on: June 01, 2017, 03:28:28 PM »

It was bright enough to do some outdoor shooting today, good think I had plenty of cold beer.

https://youtu.be/Y0Nxhfqi9WI

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General high-speed discussion / Re: First shots with the early bird camera!

« on: May 29, 2017, 08:27:36 PM »

Very cool footage, I was hoovering it up as you started posting the other day.

This is literally the first thing I got it pointed at since opening the box. The bottle is full of steam which condenses back to water leaving a strong vacuum that then draws in the water, 800x420 @ 4k-ish fps. I still need to spend a lot of time practicing getting colour and exposure correct. I also need to replace my now-exploded home depot LED light, apparently they don't like 1.41x their rated voltage even for a short period of time.

https://www.youtube.com/watch?v=CRDdCLMIkvk