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Astrophotography and Sketching >> DSLR & Digital Camera Astro Imaging & Processing

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WhitenerJ
professor emeritus


Reged: 02/06/12

Loc: Waxahachie, Texas
M78 issues!! new
      #5657387 - 02/01/13 11:38 PM Attachment (35 downloads)

I took 2 hours worth of 4 minute subs of M78 tonight and stacked them together in DSS. I did a fast rough stretch in PS and I'm having an issue with rays (lines) from what seems to be bright stars off the field. The same thing happened to me when I shot my Horsehead Nebula. Something about the 3 bright stars in the belt of Orion. Even though they are not in my image they seem to cast rays or lines into the image. Take a look at the upper right corner of the image at the blue rays and also some more lines coming down from the top. What can I do to get rid of this? I'm using an Orion EON 80mm scope with a Canon T2i modded. Also using an Astro Tech FF and IDAS light pollution filter. This normally does not happen.

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Sean13
sage


Reged: 11/17/12

Loc: North Platte, Nebraska
Re: M78 issues!! new [Re: WhitenerJ]
      #5657440 - 02/02/13 12:21 AM

A dew shield might help keep their glare off the lens better. Same thing happens to me when I photograph without a dew shield.

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Lightning
sage


Reged: 07/04/10

Loc: Canberra, Australia
Re: M78 issues!! new [Re: Sean13]
      #5657680 - 02/02/13 08:14 AM

Sounds like the perfect job for an empty Pringles tube.

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WhitenerJ
professor emeritus


Reged: 02/06/12

Loc: Waxahachie, Texas
Re: M78 issues!! new [Re: Sean13]
      #5657694 - 02/02/13 08:39 AM

But my dew shield is extended out all the way. This does not always happen except in certain areas.

Jason


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WhitenerJ
professor emeritus


Reged: 02/06/12

Loc: Waxahachie, Texas
Re: M78 issues!! new [Re: WhitenerJ]
      #5657725 - 02/02/13 09:02 AM Attachment (15 downloads)

BTW here is a closeup.

Jason


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fco_star
Carpal Tunnel
*****

Reged: 12/13/10

Loc: Texas, Midland
Re: M78 issues!! [Re: WhitenerJ]
      #5658916 - 02/02/13 08:56 PM

have you try to disable the live view while you are taking the pictures?

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nofxrx
Vendor (HyperCams & Mods)
*****

Reged: 07/12/05

Loc: Palm Bay,Florida
Re: M78 issues!! new [Re: fco_star]
      #5660881 - 02/03/13 11:06 PM

That is actually a very good point/question Francisco, but most times the LiveView/LCD will leave a "glow" like effect in the image, almost exactly like Amp Glow would look like..
Since these are clearly 'streaks'/rays coming from the very bright nearby stars(assuming), I would not think it is an issue with LV..but hey, anything is worth a shot. imho..

Jason, I would try a longer dew shield to see if that helps..
Or maybe it has something to do with the LP(IIRC it is pretty heavy/bad where you live..?)...

Cheers, and good luck!


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