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Images of the orion nebula.

  • dave_lillis
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19 years 4 months ago #8200 by dave_lillis
Replied by dave_lillis on topic Re: Images of the orion nebula.

Those are superb image Dave! I'm really impressed!
When you said you used spacers, were they between the camera and the focal reducer or the focal reducer and the scope?


Thanks Michael,
Remember the post regarding the focal lengths in a SCT a few months ago, well i decided to do a little experimenting,

The first image had a flipmirror and adapter amounting to about 7 inches between the focal reducer and camera, the FR was flush up against the scope.

The second image had the FR on the other side of the flip mirror, placing it about 6 icnhes away from the tube with the camera a further 5 or so inches away from the FR, thats nearly a foot of parts hanging off the back of the scope.

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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19 years 4 months ago #8203 by michaeloconnell
Replied by michaeloconnell on topic Re: Images of the orion nebula.
Amazing that it made such an obvious difference.
Thanks for that!

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19 years 4 months ago #8208 by Keith g
Replied by Keith g on topic Re:
Dave, Wow! Those are 2 excellent shots, from the top drawer as they say.
To improve, all that i can suggest is obvious, wait until the next moonless night with no wind, try it again and see what happens :D

Keith..

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19 years 4 months ago #8210 by dmcdona
Replied by dmcdona on topic Re: Images of the orion nebula.
Dave - I am well impressed that you got such a super image with no darks/flats. That is some camera and scope setup you have!

A bias frame is the shortest possible dark frame you can take. You apply it to your darks - the temperature of the camera must be the same for the darks and the bias. The bias frame is used when the exposure times of your darks and lights (images) are different.

Enough of the mumbo jumbo - I really think you are onto a winner with that setup - can't wait to see more images from it - when the skies clear...

Masking is the way to go for the Trapezium as James says.

Cheers

Dave

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19 years 4 months ago #8211 by dave_lillis
Replied by dave_lillis on topic Re: Images of the orion nebula.
Keith , Dave,
Next time I'll do it more correctly by making dark/flat/bias frames,
Lets just hope that this weather doesnt last too long !!

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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19 years 4 months ago #8234 by Seanie_Morris
Replied by Seanie_Morris on topic Re:

To improve, all that i can suggest is obvious, wait until the next moonless night with no wind, try it again and see what happens :D

Keith..


He only has a few months left to try it Keith, I dunno, skies like that, the chances...

:P

Dave,
they are great shots of the Orion Nebula, super text book quality there!


Seanie

Midlands Astronomy Club.
Radio Presenter (Midlands 103), Space Enthusiast, Astronomy Outreach Co-ordinator.
Former IFAS Chairperson and Secretary.

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