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Re: Monochrome D5100 and true dark current

PostPosted: Thu Feb 12, 2015 4:38 am
by Herra Kuulapaa
Here is the newest one.
Image

It has been taken with Nikon D5100 Monotec (cooled monochrome) with true dark current firmware.
4x15min each channel (Ha, OIII and SII). ISO1600 and sensor cooled to -5 °C. Scope is TS 65/6.5 quadruple.

Re: Monochrome D5100 and true dark current

PostPosted: Thu Feb 12, 2015 2:38 pm
by Simeon

Re: Monochrome D5100 and true dark current

PostPosted: Sat Feb 14, 2015 12:00 am
by astronomer
This image is simply awesome.

I haven't got a chance to try narrowband yet.

Re: Monochrome D5100 and true dark current

PostPosted: Sat Feb 14, 2015 11:44 am
by Fried Crispy
How is it that the sensor is cooled to -5 °C?

Could you show a picture of your camera in action?

Please, please, please??

Re: Monochrome D5100 and true dark current

PostPosted: Sat Feb 14, 2015 1:09 pm
by astronomer

Re: Monochrome D5100 and true dark current

PostPosted: Fri Feb 20, 2015 5:13 am
by Herra Kuulapaa

Dark Current -Temperature curve

PostPosted: Sat Feb 28, 2015 11:43 am
by astronomer
Image

Image

0.14eps @ RT
0.005eps < 0°C

Doubling temp:
4.8 > 10°C
6.8 < 10°C

I'd say this is much better than CCDs.

Re: Monochrome D5100 and true dark current

PostPosted: Mon Mar 02, 2015 7:47 am
by Herra Kuulapaa
More samples:
Image
Monotec D5100, 2h Ha, 1h O-III and 1h S-II, captured with true dark current firmware and BackyardNikon

Re: Monochrome D5100 and true dark current

PostPosted: Sat Aug 08, 2015 4:17 am
by Herra Kuulapaa
Just discussed about a possibility of using mono D5100 for the Orion nebula mosaic with one forum member and promised to post my example I took this March. It works rather well I think :handgestures-thumbupleft:

Image
Ha
Image
Ha,O,S narrow bands

It's not a mosaic due to the short focal length of my scope though, but you get the idea...

Re: Monochrome D5100 and true dark current

PostPosted: Sat Aug 22, 2015 3:23 am
by Hertog
A quick question regarding the dark current patch.
Would there be any gain in using the DC patch on an otherwise unmodified camera?

If I where to make a session (with varying temperature due to sensor use/ambient) with the DC patch enabled, no use of dark frames, would the stack contain more useful information or wouldn't I need to bother?

Of course there would be a ton of hot pixels, but PixInsight and dithering could take care of that.
Any info on that?

Thanks in advance,

Hertog