Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: julian on Dec 11, 2010, 16:31:51

Title: M42 and 2 seasons
Post by: julian on Dec 11, 2010, 16:31:51


M42 17 images at 2min and 21 images at 30sec daks flats bias used  9\12\2010
Sky Watcher Mak-Newt 190 canon 40D ISO 800 PHD guiding with QHY5 EQ6 Pro mount.
More subs needed and a darker sky. :x :x

(http://farm6.static.flickr.com/5250/5251803128_0a8e6b0cdb_b.jpg)



Lower half of image taken at Five Arches 3\12\2010
Top half taken in August
(http://farm6.static.flickr.com/5286/5251803250_15cf1d2d9b_b.jpg)

:squirrel: Now where did I put my nuts

Title: Re: M42 and 2 seasons
Post by: Mac on Dec 11, 2010, 17:57:35
could have used flash to fill in the tree, :lol:
its a bit dark otherwise.

Nice capture.
Mac.
Title: Re: M42 and 2 seasons
Post by: Rocket Pooch on Dec 11, 2010, 21:09:09
Julian,

I love the second image, I think its the first composite image put on the forumn, very good.  And if its not a compisite, its excellent.

Chris

Title: Re: M42 and 2 seasons
Post by: Fay on Dec 11, 2010, 21:31:31
oh Julian, what a difference since you changed equipment! Bet you are well pleased, they are great. Second one is similar to the one that was in the finals of SKy @ Night Photographer of the year
Title: Re: M42 and 2 seasons
Post by: MarkS on Dec 12, 2010, 06:13:03

Lovely M42 - you've processed it very well, combining the short and long exposures.  What filter(s) are you using?

Your second image is very intriguing.  I'm trying to work out how you did it.  However I'm pretty sure that the Milky Way isn't visible down to the horizon at Five Arches!  Must be a well-executed composite.  Nice one!

Mark
Title: Re: M42 and 2 seasons
Post by: julian on Dec 13, 2010, 22:16:59
QuoteWhat filter(s) are you using?

Here's a diagram of the camera and filters used for M42 Mark

(http://farm6.static.flickr.com/5085/5259126660_1e3bb6a7fd_b.jpg)

Here is the bottom half of the Five Arches image

(http://farm6.static.flickr.com/5282/5259096364_8bdec27b2a_b.jpg)
Title: Re: M42 and 2 seasons
Post by: Ian on Dec 13, 2010, 23:27:11
why the clear glass filter Julian?
Title: Re: M42 and 2 seasons
Post by: Mac on Dec 13, 2010, 23:40:40
Also is the Antares ALP a light polution filter as well?
If so why the two light polution filters.

Mac
Title: Re: M42 and 2 seasons
Post by: RobertM on Dec 14, 2010, 13:04:28
That's a very good noise free M42 Julian, that combination is looking really good.  Did you use DDP or some non-linear stretch in the processing?

That's a nice interesting composite, it must have taken you a while to get that right?

Robert