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QHY128c Funny darks

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#1 Haggish59

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Posted 13 February 2018 - 05:25 PM

Hi,
Just got my new QHY128c in house, but then weather is of course bad ;-)
I have used the evening to test and take some dark frames, but then I was a little surprised when the dark frames were not uniform.
Have someone explanation about it. Is this normal?  The picture is at -20 deg C, 180s, gain 2200, offset 80

Attached Thumbnails

  • Dark_G2200_off80-00303.jpg

Edited by Haggish59, 13 February 2018 - 05:40 PM.


#2 GA-HAMAL

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Posted 13 February 2018 - 06:25 PM

A light got to the inside of the camera. scratchhead2.gif


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#3 Haggish59

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Posted 14 February 2018 - 12:19 AM

Thanks for the reply.

Maybe but how? it's in my dark observatory at night time.

But I'll try again tonight be sure.


Edited by Haggish59, 14 February 2018 - 01:16 AM.


#4 Haggish59

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Posted 14 February 2018 - 01:31 PM

You was right; a smal lamp was not turn off and there was a small light leak in my filterslider bow.gif


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#5 Haggish59

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Posted 18 February 2018 - 05:30 AM

Hello again,
I've found that there must be the EOS lens adapter (Canon EOS / M54 10mm Adapter (020071) that has a significant light leak. The light comes in between the shiny ring and the black, in the middle of the screws that hold them together. I'll add a picture that shows the light and one that shows the place. The 6 holes on the Center AngleAdjustment Ring (020002) will also cause false lights when they are not covered.

 

-Geir

Attached Thumbnails

  • IMG_5554.jpg
  • QHY-Adapters-Canon_Lens_Adapter-020071_600px__37312.1498222457.220.290.jpg
  • QHY367C3-S.jpg

Edited by Haggish59, 18 February 2018 - 06:58 AM.

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