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.
Last edited by tilbrook@rbe.ne; 15-04-2013 at 06:24 PM.
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.
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.
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!
Quote:
Originally Posted by 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.
Thanks David!
Didn't see the red cast till you pointed it out, thanks!
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.
Nice one Justin and worth all the effort thats gone into the image.
Allan
Thanks Allan!
Quote:
Originally Posted by Rigel003
Great image Justin, with lots of well defined detail.
Thanks Graeme!
Quote:
Originally Posted by 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.
Thanks Paul!
Getting there, I left the mirror fan on, that's what buggered up the stars.
Thanks Allan!
Getting there, I left the mirror fan on, that's what buggered up the stars.
Cheers,
Justin.
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.
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.
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.
