Recent Posts

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91
General high-speed discussion / Re: External Battery / 20V Power Bank for longer run time
« Last post by Sael on October 17, 2018, 06:45:57 PM »
The external battery I bought is this one off of amazon:
https://www.amazon.ca/gp/product/B01BLXY3B6/

It's handled things fairly well thus far, surviving being tossed around in my work bag and multiple coffee spills.. though it appears to have gone up in price by ~100CAD since I bought it..
92
Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« Last post by Sael on October 17, 2018, 06:36:57 PM »
@Nikon1 6 or 12dB, I don't remember... I did abuse levels correction to hide noise however, because it's a black background with a bright object you can crush the shadows and hide a lot of the lower intensity noise. Attached is an example without the crushed blacks. Nikon to c adapters and Canon to c adapters are available on ebay for ~$40-$60CAD.

@NiNeff 600mm on a ~4x crop makes for ~2400mm 35mm equivalent. "magnification" doesn't really make much sense in the photography world unless you have a reference point. Some camera lines use a times zoom, but that's relative to the widest view of the camera. The field of view of a lens is mainly dependent on the focal length and the sensor size. A 50mm lens on a 35mm "Full Frame" sensor (arguably the most common lens and format in the film days) has about a 40 degree FOV, 600mm on a full frame is about 3.4 degrees, and with the size of the sensor on the Chronos it would be about 0.85 degrees. I guess that would be 47x then? Or 4x compared to the widest the lens goes... (150mm)
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Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« Last post by Nikon1 on October 17, 2018, 11:20:29 AM »
@Sael: that mars video is actually really good, I guess you're using a magnification of about 250x to 300? Now I'll definitively need to hook up my telescope to the Chronos just for the fun of it
You could try just using Some Old Paper-Core from Toilet Paper or alike and A bunch of Tape for an Adapter if you want to go really ghetto and cheap with the adapter. Just cut it down to about the right Length and make sure you secure the Camera, so it wont drop down...
If you are patient enough and want to spend the Money there Should be Canon to C-Mount Adapters somewhere...i think?
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Software Dev / Re: Chronos V0.3.1 Beta - Updated Oct 15 2018 with beta-9
« Last post by GFE on October 17, 2018, 09:51:59 AM »
Thank you so much! :) So easy updating - and it work's - great!
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Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« Last post by NiNeff on October 17, 2018, 09:31:00 AM »
The noise you're seeing here is actually just dark noise. Black cal won't work below about 60fps, so what you're seeing is an uncalibrated image. Try doing a black cal at 60fps then changing to 10fps.
That's actually what it did. I first did a blackcal an then changed the FPS. as it was very bad, I did a second black cal at 10fps with no improvement, obviously.

@nikon 1: I don't remember the f-stop settings, but it was very closed. the exposure time was also way down to about 1% The moon is indeed very bright.

@Sael: that mars video is actually really good, I guess you're using a magnification of about 250x to 300? Now I'll definitively need to hook up my telescope to the Chronos just for the fun of it
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Software Dev / Re: Chronos V0.3.1 Beta - Updated Oct 15 2018 with beta-9
« Last post by BiduleOhm on October 17, 2018, 08:07:04 AM »
Just plug the USB stick in the USB (A) port of the camera (same port as the eSATA port actually), no need for OTG cable or other things.
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Software Dev / Re: Chronos V0.3.1 Beta - Updated Oct 15 2018 with beta-9
« Last post by GFE on October 17, 2018, 07:32:37 AM »
Hello, the new Software seems to be very interesting! I would like to test it too - in particular, I would like to connect an external monitor via hdmi, but I am not able to install it yet. That's why I ask for help: I use an adapter cable from usb mini male to usb A female, so I can connect an usb-stick directly to the usb-otg-connection socket of chronos 1.4. The used stick offers otg-functionality. but I have not succeeded so far that the stick is recognized as a usb drive! I also can't save the calibration data to the usb drive; the display shows always the message: "Error: no device is mounted to /media/sda1". What can I do?
Thank you for helpful answers!
Winfried
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Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« Last post by Nikon1 on October 17, 2018, 04:44:19 AM »
I was able to open and play it with VLC without any problems.
I tried again, and now i can open it. The other 3 Downloaded Files from the Same Video wont open in VLC or in AE CS6
While the noise is still quite strong for my taste on this shot with the moon, all things considered its still rather impressive for an camera which wasnt meant to do anything like this, especialy with the mars one at 500fps.
.
@Sael:
What Gain settings did you use on those? Propably Base-Gain (0) for the moon, but it propably has to be an higher Gain-Setting for the Mars one at that framerate?
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Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« Last post by BiduleOhm on October 17, 2018, 04:35:51 AM »
I was able to open and play it with VLC without any problems.
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Chronos User Discussion / Re: Moonlit stills, Chronos suitable?
« Last post by Nikon1 on October 17, 2018, 04:24:39 AM »
I downloaded the Video from the moon now 3 times but cant open any one of them... Dont know what that is all about. Maybe just my bad internet connection here.
But the Mars one is actually pretty impressive.
If the Noise gets so much worse below 60fps, then maybe just use 60fps or faster i guess...
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