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Messages - tesla500

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196
Do all the 1/4" mounts have helicoil inserts or just the bottom/side one? I know that was going to be a feature, I'm unsure if it made it to the final production.

Just the bottom as that's the most commonly used one.

197
Chronos User Discussion / Re: SD Card Speeds
« on: June 28, 2017, 10:17:21 AM »
The SD interface is limited to 48MHz @ 4-bit, so cards above 24MB/s are of no benefit. I've had good luck with normal class 10 cards (10MB/s). Higher speeds may be beneficial later when RAW saving is available, but there doesn't appear to be any benefit for compressed saving, except maybe if you turn the bitrate up very high.

I've had poor experiences with pretty much all USB drives, they just don't seem to have good or consistent write speed. The one drive that seems to work reasonably is the Sandisk Cruzer Glide. Portable hard drives seem fine, I haven't had any saving problems with those.

David


199
Software Dev / Re: "Missing" the out point when saving.
« on: June 24, 2017, 11:50:58 AM »
I would try an SD card, I've experienced far more problems with USB drives than SD cards.

200
Chronos User Discussion / Re: Chronos 1.4 Footage Thread
« on: June 23, 2017, 11:44:04 PM »
Lauri from HPC/Beyond the Press took what is currently my favorite thing ever shot on Chronos:

https://youtu.be/U8R0txBYayg?t=288

I love how the garbage can changes color for a few hundred microseconds before breaking and reverting to the original color.

201
Software Dev / Re: "Missing" the out point when saving.
« on: June 23, 2017, 11:41:00 PM »
That is known to happen when the card becomes completely full during save, and potentially if the card doesn't have enough write speed. It seems quite rare though, if you find a way to reliably duplicate it, let me know!

202
Chronos User Discussion / Re: Chronos 1.4 Footage Thread
« on: June 19, 2017, 05:41:26 PM »
Video card that had an odd failure, causing it to catch fire on power-on

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

203
Chronos User Discussion / Re: 2nd battery
« on: June 19, 2017, 02:26:02 PM »
Yes, any EN-EL4a type will work.

Edit: We've since found out this is not true. There are two common versions of the EN-EL4A (other than the very expensive legitimate Nikon ones). When buying batteries, look for ones that have a grey connector, rather than black, and have a glossy case. These are the good quality ones.

Example of good battery here, and a bad one is shown here. The bad ones are very tight in the case, and sometimes won't insert properly or make proper contact.

204
Chronos User Discussion / Re: Chronos 1.4 Footage Thread
« on: June 18, 2017, 03:09:22 PM »
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

Nice gifs dude! I want to make one of those but scared I'll shock myself to death. Want someone who knows what they are doing to make me one lol.
Anyway here is a video of what's going on guys - https://www.youtube.com/watch?v=n7jFQWE8b28&feature=youtu.be

In the first part I just lower the aperture to make the lines more visible, there is one permanent dark line, one lighter line, and then the bugged shutter line.
After the text, I am simply moving the shutter to show the moving line bug.
Help? It sort of makes lower resolutions unusable currently.

I had one sensor that had a problem like this, but it was quite obvious, I sent that sensor back to Luxima for evaluation and am waiting to hear back. This camera may have a similar problem but not as bad. I'd like to swap your camera out for another one and investigate the issue, especially to figure out a way catch these problems in production.

205
Software Dev / Re: Dev. environment components
« on: June 17, 2017, 01:21:33 AM »
You'll want to know Linux, C/C++, and the QT framework for GUI development, and the Gstreamer/Openmax video framework for the video saving functionality

206
The softness is due mainly to the lens, followed by the demosaic algorithm. The shot you picked is one of the sharper ones, and is limited more by the demosaic than the lens I believe, especially for the duck in the center. The ones at the edge are more focus limited due to the lens, and possibly motion blur. The current bilinear demosaic does introduce some softness. A much sharper AHD demosaic is on the roadmap, and of course with RAW saving the demosaic is up to the user in post. It will never be as sharp as the monochrome camera however, some loss of sharpness is intrinsic to Bayer filter cameras, but with a good demosaic it can be almost as good as mono for most shots.

207
Chronos User Discussion / Re: Chronos 1.4 Footage Thread
« on: June 16, 2017, 01:45:40 PM »
Did you do a black cal?

208
Chronos User Discussion / Re: Macro lens suggestions
« on: June 16, 2017, 12:41:46 AM »
Generally the prime lenses (lenses that don't zoom) are good for macro shots, In fact, all the lenses listed in the accessories section of the store except the 12.5-75mm zoom are good, and will focus down to about 15cm or closer. With some macro spacers or extra macro rings, you can focus right down to 0cm in front of most of the lenses.

The 12.5-75mm zoom lens can also be used for macro shots, while zoomed out, using the 1 or 2mm spacer rings. It's not quite as sharp as you'd get with a prime though. The full 5mm macro ring will put the focus point inside the lens body so that's not particularly useful :P You can also make your own spacers quite easily using sheets of plastic or cardboard. Due to how the optics work, when zoomed in, the macro rings have far less of an effect.

For testing, you can partially unscrew the lens from the camera, being careful it doesn't fall out of course. The backfocus ring can also be used to get macro functionality, just don't unscrew it more than about 2 turns. You can also just hold the lens manually in front of the camera to get an idea how many macro rings you'll need.

For those wondering what the spacer/macro rings do, when you move the lens farther away from the sensor, it will focus closer than normal, and vise versa.

209
Chronos User Discussion / Re: How Long Does Black Calibration Take?
« on: June 13, 2017, 04:43:19 PM »
Sounds like a RAM problem, I've sent you an email with further instructions.

210
Chronos User Discussion / Re: How Long Does Black Calibration Take?
« on: June 12, 2017, 11:09:54 PM »
Flashing vertical lines definitely isn't normal, you should get a normal image once the camera is booted. If you're not getting a proper image, we'll swap your camera out for another one.

Boot the camera, then press record, and one second later press stop. Got into playback mode, how many frames does it show have been recorded? This will be displayed on the center of the button area on the right.

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