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M44 from Riberac

Started by MarkS, Apr 11, 2010, 23:29:39

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MarkS

I'm now home from my Easter break in France.

Here is the first image I took whilst down there.
Modified Canon 350D on Tak Epsilon 180ED (F2.8 with 500mm focal length) with 2" Baader IR/UV filter.
36 x 90sec exposures at ISO 800
Stacked, asinh range compression, then scaled by 2/3 in IRIS (to help disguise the elongated stars on the right hand side caused by the CCD misalignment)
Date taken: 5 April 2010



Non-cropped version is here:
http://www.markshelley.co.uk/webdisk/takm44_05042010.jpg

We had 6 clear nights out of 9 and I did some imaging on 4 of them.  

Mark

Mike

Very nice. But there are those strange rectangular stars again.
We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology. Carl Sagan

MarkS

I'm not quite sure what you mean Mike.

Do you mean that the bright stars (with the diffraction spikes) look rectangular?

Or something else?

Mark

Rocket Pooch

Quote from: Mike on Apr 12, 2010, 09:47:04
Very nice. But there are those strange rectangular stars again.

They are the thickness of the spiders, you get it on a VC200L as well.

Mark, I really like this picture, fantastic colours, little noise and nice little galaxies as well.....

Chris

Mike

Quote from: MarkS on Apr 12, 2010, 10:16:24
Do you mean that the bright stars (with the diffraction spikes) look rectangular?

Yes they look rectangular to me. It was the same on your other image.
We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology. Carl Sagan

RobertM

Have to agree with SD, the colours are really good and it's a lovely image.

Robert

MarkS


Thanks for the comments and thanks, Chris, for the explanation of the "rectangular" stars - the Tak spider is certainly very substantial.

Mark

Mike

I might expect a square look,  but why rectangular?
We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology. Carl Sagan

Mac

QuoteI might expect a square look,  but why rectangular?

Oval stars? :D

Fay

I agree, lovely colours & no noise, very nice Mark.
It is healthier to be mutton dressed as lamb, than mutton dressed as mutton!

mickw

Quotestrange rectangular stars 

Widescreen monitor settings ?
Growing Old is mandatory - Growing Up is optional

MarkS

Quote from: Mac
Oval stars? :D

Yes, the rectangular stars are oval stars with diffraction spikes.  My guiding was not as good as it should have been for one reason or another.

I think I'm going to have to invest in a decent guide camera now ...

Mark

MarkS

Quote from: MarkS
I think I'm going to have to invest in a decent guide camera now ...

QHY5 has been dispatched.  It's on its way ... ;-)