M20 - Triffid Nebula (2nd light)

[monoxide]

Hi Guys,
heres my second go at it, i think i'm starting to get somewhere now, i also managed to get my MPCC back into service so no more coma! its doing an amazing job too.

i'm very happy with this image, i know it really needs some flats though.

i also noticed i captured something moving through the fov (check the high res version), anyone know what it might be? i've attached a crop of it too.
i'm a bit tired to check it out myself now but i'll definately go through my subs tonight and try to work out what it is.


calibrated with darks/offset but no flats yet
10x 600s subs
MPCC + UHC-S

high res here : http://i289.photobucket.com/albums/ll226/t0nesAstro/m20triffid.jpg

[iceman]

Excellent result! I'd probably raise the black point a bit though.

Are you imaging through the 6" newt?

[monoxide]

Thanks Mike,
yep, imaging through the 6" and guiding through the ED80.
the 6" has a really thick 3 vane spider and gives the strange diffraction spikes

i thought i set the black point a bit too low, i'll fix that up tonight.
hopefully i'll get some flats aswell.

[TrevorW]

The movement could be anything with 900 satellites in orbit anyone want to guess, aliens perhaps

[Ric]

Hi Tj, a lovely looking image. The high res is a beauty as well, nice subtle colours in the nebula.

Cheers

[Kirkus]

With 10 min. subs I'd think a satellite would've traveled a further distance than that.

[AlexN]

me too Kirkus.. Satellites are here on minute, gone the next, that was obviously not going anywhere fast... Meteor/comet?

[JohnG]

Possibly a satellite in a Geostationary Orbit, they tend to occilate slightly so would leave a trail like you have.

Cheers

JohnG

[tornado33]

Excellent detail there. The MPCC gets rid of every bit of coma doesnt it?
Doign soem flat is the go for sure, however with a single object like the Triffid you can also use Gradient Xterminator photoshop plugin and just draw round it. That will flatten the background nicely
Scott

[monoxide]

Thanks guys,
i'm still not exactly sure what it was moving through the frames, i went through my subs and i cant spot movement in any of those so its moving very slowly.

i've also quickly re-processed, i think this version looks a bit better.

high res: http://i289.photobucket.com/albums/ll226/t0nesAstro/triffid3.jpg

i prefer this version: http://i289.photobucket.com/albums/ll226/t0nesAstro/triffid3-1.jpg

ok, no more processing on this one.

[bluescope]

Yeah the last version looks good Tj nice job !

:thumbsup:

[leon]

I like it TJ, you have captured it very well, with plenty of detail and nice subtle colours, keep at it mate, your doing a fine job.

And the thing you have in the image, could be any piece of junk floating around up there, I've had a few of those myself, makes for an interesting image, I reckon.

Leon

[monoxide]

thanks guys, its certainly a lot more enjoyable than hand guiding a dslr thats for sure.
how nice is it to start guiding then get an image sequence going and come in for a nice cuppa + watch a movie while your subs are being taken.
next up on my shopping list is a pier i think, oh and a Ha filter :D

[AlexN]

The latter of the two most recent re-pro's is brilliant. Very well done!

Cant wait till I can set up an imaging run, then walk away and come back when she's done! :) that'll be pro!

Is the QHY series the bees knees in reguards to CCD imaging of DSO's (within a reasonable price range) How do they compare to using a DSLR?

Figured I should ask before I go and spend thousands of dollars...

Cheers, and once again, Well done mate. Top work (especially for a 2nd light!!!!!)

Alex.

[monoxide]

the QHY8 is an excellent camera, no doubt about it.
you can check it out here:
http://web.aanet.com.au/gama/QHY8.html
Theo is a great guy and i'm sure if you had any questions he would fill you in on everything you wanted to know.

i dont really want to make the comparisons to a dslr myself but in my opinion, it absolutely flogs em.

[beren]

:)Top work TJ, another fine image using a QHY8 :confuse3:

[strongmanmike]

Nice work TJ.

There appears to be a slight lack of colour dynamics to me, with the image appearing mostly kind of blue and red...? Is this form the UHC filter or the fact that it is a one shot colour chip..?

Still a very pleasing image :thumbsup:

Mike

[monoxide]

thanks Mike, the UHC-S filter tends to throw the colour balance a bit.

[Gama]

UHC filters tend to alter the color balance somewhat. Some brands do a better job than others, but in the end, there is some modification.

Below is 2 graphs, one is the Sony sensor, and the other is a UHC-S filter response.
You can see why there is some inbalance with color right of the bat..

Theo.

[Robert_T]

I was wondering whether your mystery object, could be an asteroid, given your imaging at 750mm and over a fair period of time, the movement is very small. :shrug: