Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

QHY128c Funny darks

  • Please log in to reply
4 replies to this topic

#1 Haggish59

Haggish59

    Lift Off

  • -----
  • topic starter
  • Posts: 16
  • Joined: 07 Dec 2017
  • Loc: Norway

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

GA-HAMAL

    Ranger 4

  • -----
  • Posts: 389
  • Joined: 18 Aug 2014
  • Loc: Poland

Posted 13 February 2018 - 06:25 PM

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


  • psandelle likes this

#3 Haggish59

Haggish59

    Lift Off

  • -----
  • topic starter
  • Posts: 16
  • Joined: 07 Dec 2017
  • Loc: Norway

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

Haggish59

    Lift Off

  • -----
  • topic starter
  • Posts: 16
  • Joined: 07 Dec 2017
  • Loc: Norway

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


  • psandelle likes this

#5 Haggish59

Haggish59

    Lift Off

  • -----
  • topic starter
  • Posts: 16
  • Joined: 07 Dec 2017
  • Loc: Norway

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.

  • GA-HAMAL likes this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics