First DSO image M13 - Bizibilder

[Bizibilder]

My first DSO!! Comments please!!

I chose an "easy" target (I hope) and took 8 x 65sec subs at prime focus on the SW200P using a Canon 1000D at ISO 800. Mount was an EQ5 unguided. I did take RAW and flats etc but the image here is simply stacked JPEGS with very little processing.

I will try a "full" process tomorrow!

[Deneb]

Thats a very nice M13 you got there, just make sure not to burn out the core when you reprocess it..

Nadeem.

[Bizibilder]

Thanks Nadeem. Your comment is appreciated! I've heard about burning out the core on this object - are there any tricks to the processing you could pass on?

[Deneb]

Was this taken with a modded or unmodded camera ? Don't go crazy on the Curves..

Cheers

Nadeem.

[Bizibilder]

Unmodded camera.

[ollypenrice]

In my M13, for which I had a lot of CCD data, I handled the core problem by doing two stretches. The first was for the outlying stars and did have the core a little overcooked. In a second stretch, starting from scratch, I looked only at the core and got that right, not worrying about failing to reaveal the faint stuff.

Then I pasted the core stretch onto the original and erased all but the core (using a lasso and Select Inverse). Levels allows you to choose how much of the new image is visible. Because the object is circular and regular there was no need to make a proper layer mask. Feathered Lasso and erase was fine. Quick, easy, effective and simpler than trying to get one stretch to do it all. I also use this technique on problem bright stars like Alnitak.

Olly

[Bizibilder]

Thanks Olly. I can but try! I only have 8mins of subs - I'm going to try and take more tonight so I can add them in as well (Eveything I do at the moment is experimental so attempting to add subs fron two nights is a major adventure!!)

[philj]

Thats nice. M13 can be overblown so easily in the core as others have said. Thats nicely done so far youve got the propeller which is all too easy to lose in processing:D

Phil

[ollypenrice]

Thanks Olly. I can but try! I only have 8mins of subs - I'm going to try and take more tonight so I can add them in as well (Eveything I do at the moment is experimental so attempting to add subs fron two nights is a major adventure!!)

Oh, I remember that adventure myself! Now it is a bagatelle because I just use Registar to align and combine images. I love that programme.

Hope it goes well.

Olly

[Bizibilder]

OK 8 x 65 second subs and 5 flats processed in DSS and GIMP. I've done about all I can! Uncropped.

At least I can see NGC 6207 (top centre - I think!).

[iamjulian]

Excellent. Seems we were living parallel lives last night

What shall we do for our second target? M51?

[Bizibilder]

You do M51 and I'll do the clouds!!!!!