M20 - Trifid and M21 - Open Cluster

[StuartJPP]

Old data from holiday in Fuerteventura in May this year, but a totally fresh rework. I wanted a bit wider field to get M21 in as well (not that I am a huge fan of open clusters mind you).

Modified Canon 1100D with Canon 500mm f/4 L IS lens @ ISO1600.
AstroTrac TT320X Mount.
55x 60 second lights

If I get the opportunity again, I will aim for longer subs to try and get blue nebulosity around the whole of M20, this one just has too little data.
 

M20 - Trifid Nebula With M21 by StuartJPP, on Flickr

[nytecam]

Excellent image and nice to see the 'blues' too

[Qualia]

Gorgeous image, Stuart. Thank you for sharing.

[laser_jock99]

Nice one- from portable equipment too.

[ollypenrice]

Very nice image. Longer subs would certainly help expand the blue and maybe pick up some outling dust, too.

Olly

[Dave Smith]

Lovely image - one to be proud of.

Dave

[michael.h.f.wilkinson]

Very nice image, with colours showing up very well

[andyo]

I really like this one very nice capture

[StuartJPP]

Many thanks for commenting everyone

Nice one- from portable equipment too.

Everything is a compromise. I'd certainly like to be able to get longer subs, but anything heavier mount wise and I wouldn't be able to take it with me on the plane.

[Fay]

You have done well there Stuart.Astrotrac as well.

Fay

[jnc71106]

thats a very impressive image Stuart.

Whats the max sub length with the 500mm on the astrotrac before you have issues with trailing ?

[StuartJPP]

You have done well there Stuart.Astrotrac as well.

Fay

Thanks Fay.

thats a very impressive image Stuart.

Whats the max sub length with the 500mm on the astrotrac before you have issues with trailing ?

The most I have got is 120 seconds, though that is pushing it and not all subs are usable. I usually aim for 90 seconds which I can get fairly easily however it depends on where the object is in the sky. Zenith is a lot easier than on the horizon for instance, though framing is much more difficult. To be honest a 400mm f/5.6 L would be the best compromise, but I like the focal length of the 500mm, the faster optics and the fact that I already own it for birding.

[jnc71106]

Cheers Stuart. Your 500mm and 1100D give pretty much the same FOV as my Atik and 200mm so it gives me an idea of what I might achieve

Is that with a rough PA or drift alignment ?

[Psychobilly]

Caught this on Flickr earlier

You certainly seem to have nailed theat setup Stewart... cracking results... I know you have put a lot of work optimising the setup and it's paid dividends...

I think it will be a while before I can work up to 500mm+ fl's

Kelling will hopefully be the first real outing for my kit...

Peter...

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[Quatermass]

My utter favourite that's is stunning.