M83.

[tilbrook@rbe.ne]

Hi,

M83 was the first galaxy I imaged last year with my new setup.

Time to revisit, this image is just over 2.5 hours. I couldn't see any advantage in any more exposures, using an unmodded DSLR and the resolution if the 8" f/4 astrograph.

The stars are not as I would like, because some silly bugger left the mirror fan going and there's some flexure too. Having said that, the overall image is fairly clean.

Equipment.

8" Newtonian astrograph f/4. on Heq pro 5 mount. Orion mini guider.

Unmodded canon 1100D, baader coma corrector, cooler box.

19 x 8 minute subs, darks and flat frames applied.

Median stack in DSS, processed in PS7.

Cheers,

Justin.

[Larryp]

Nice image, Justin. I tried to observe it on Saturday night, but the light pollution where I live is so bad I could only see a faint smudge with averted vision.

[David Fitz-Henr]

Nice image Justin! My only suggestion would be that there is a bit of a reddish cast across the image that you could process out.

[tilbrook@rbe.ne]

Thanks Laurie!

Don't you wish for the days when they used to turn the street lights off after midnight, at least in SA they did.
Showing my age now huh!



Thanks David!

Didn't see the red cast till you pointed it out, thanks!

Try this one.

Cheers,

Justin.

[Ross G]

Nice looking galaxy photo Justin.

Nice composition and detail.

Ross.

[tilbrook@rbe.ne]

Thanks Ross!

Done a bit more to the image and cropped further.
Quite happy with the colour.

Cheers,

Justin.

[David Fitz-Henr]

Looking good Justin!

[tilbrook@rbe.ne]

Thanks David!

Cheers,

Justin.

[allan gould]

Nice one Justin and worth all the effort thats gone into the image.
Allan

[Rigel003]

Great image Justin, with lots of well defined detail.

[Paul Haese]

Looking good Justin. Detail is ok but maybe just a little out of focus. The latest colour is the best so far but still has a purple look across the field. Still a good result though.

[tilbrook@rbe.ne]

Thanks Allan!



Thanks Graeme!



Thanks Paul!

Getting there, I left the mirror fan on, that's what buggered up the stars.

Cheers,

Justin.

[Peter.M]

Interestingly I always leave the mirror fan on on my scope when I am imaging. I was always under the impression that it would help to keep dew off the primary and I have never had issues with dew. I have also never had weird shaped stars from it.

[tilbrook@rbe.ne]

Hi Peter,

Certainly it will keep the dew off, but it can also create turbulence in the tube. You only have to do a star test to see it.

Cheers,

Justin.