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Messages - BiduleOhm

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1
Chronos User Discussion / Re: Let's talk LENSES!
« on: October 14, 2018, 02:27:57 AM »
There's also the ones who don't have any electronics inside (they're called DC iris; the one you posted is called video iris) and the camera do all the job, they have a 4 pins square connector instead of the mini-DIN like connector; 2 for motor and 2 for feedback (and both are coils like in a galvanometer so be careful with what you power it).


2
Chronos User Discussion / Re: Let's talk LENSES!
« on: October 14, 2018, 01:44:52 AM »
This kind of lense usually take a 9-12 V power and the composite video signal. In short they look at the average level of the video signal to know the luminance and open/close the iris. You can see in the photo of the datasheet it's the case here and you even have the color of the wires matched with what they do. So by sending a 0 to about 1 V DC voltage at the video input you should be able to control the lense iris.

I plan to test this when I get this lens (thanks for posting the link BTW ;)) and post a simple schematic if you want to do the same.

3
Software Dev / Re: Chronos V0.3.1 Beta
« on: October 10, 2018, 11:01:40 AM »
Did you format the drive?

If yes, which file system did you chose?

4
Software Dev / Re: Updating the UI: Network / Remote Control Screen
« on: October 03, 2018, 01:09:58 AM »
For SSH, we can restrict logons to the 192.168.x.x subnet. This subnet is not publicly routable, so it isn't accessible from the internet at large.

AFAIK you can route anything to anything.

5
Chronos User Discussion / Re: Cheap SD cards class 10
« on: October 01, 2018, 12:48:35 PM »
Be very careful with (micro) SD cards, there are chinese clones everywhere and they just copy the specs on the website but the card will never meet them...

Personally I only buy good known model/brand from reputed sources and I never had any problems.

6
Software Dev / Re: Updating the UI: Network / Remote Control Screen
« on: September 28, 2018, 04:10:49 AM »
I prefer the v4 because the only difference seems to be the text "Visit the [...] for remote control" which is a bit useless (we all know what to do with an URL) and use interface real estate.

7
Chronos User Discussion / Re: Chronos 1.4 Footage Thread
« on: September 24, 2018, 06:14:36 PM »
I should have used quotes, sorry. The second part was for Nikon1.

8
Chronos User Discussion / Re: Chronos 1.4 Footage Thread
« on: September 24, 2018, 01:06:56 PM »
Very nice video ;)

Well 75 mm with a crop factor of 3.9 is 292 mm so your estimated 300 mm was very close :D

9
Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« on: September 23, 2018, 03:41:59 PM »
There are some good Star-Tracking Mount you could built on your own and get solid results, even with high-Resolution-DSLR´s.

Yes, arduino and raspberry pi are making things like that pretty easy now.

People have done stuff like that and did exposures of multiple weeks on an simle sheet of plain white office paper with an pinhole. The Sun in frame and all the light beeing projected all the time trough the lens onto the paper will "Burn" /bleach the image into the Paper and it will remain visible.

I didn't know this method existed, very interesting, thanks for the info :)

I seriously never thought i could get hyped by the idea of using an highspeed-camera for timelapse, astro- /night-Stuff and Pinhole Lenses, but this is just an crazy cool idea.

Yep, I thought about doing timelapses with the Chronos because you can do interesting/weird things like non-regular intervals for example (and I love the irony of doing a really slow thing with a very fast camera... ;D), but I never thought about astro-photography.


10
Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« on: September 23, 2018, 08:36:20 AM »
Unless there's something I missed there shouldn't be any limit (new crazy idea: make a photo with an exposure of weeks or months...). I think the first limitation would be software crashes but the Chronos shouldn't have this problem even for multiple days exposures.

But you'll need a very good mount to track what you want with no smearing.

11
Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« on: September 23, 2018, 07:24:39 AM »
Actually if you use the mode where the trigger controls the shutter you should be able to do really long exposures, far more than 10 seconds AFAIK.

12
Software Dev / Re: Updating the UI: Network / Remote Control Screen
« on: September 22, 2018, 01:53:34 PM »
Of course it should not be the only element in your security, it's just a very simple way to avoid the majority of attacks.

13
Software Dev / Re: Updating the UI: Network / Remote Control Screen
« on: September 22, 2018, 06:53:24 AM »
For SSH I think you need to add a field for the port because leaving the SSH server on port 22 is not a good idea (the vast majority of automated attacks by bots are on the default port, if you can change it you avoid 95 % of them).

14
Chronos User Discussion / Re: Power Supply
« on: September 17, 2018, 11:51:47 AM »
The original one is a 19 V 2.1 A PSU made by Delta, model ADP-40KD and is pretty small for its power (something like 3 * 4 * 10 cm).

But any power supply of 40 W or more and between 17 and 22 V with a 5.5/2.5 positive tip barrel jack (all info is from the camera's datasheet) is compatible.


Edit: it's this one: https://www.digikey.fr/product-detail/fr/delta-electronics/ADP-40KD-BBBM/1145-1139-ND/5250423 ;)

15
The main problem is in the debayering method but the last firmware update (0.3.0) has greatly improved it (but 99.9 % of the videos on the internet are videos from before the update was available).

The raw data is very good since the beginning: http://forum.krontech.ca/index.php?topic=132.msg1115#msg1115

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