Hello all...
Posting a few from last night - clear in SA and no moon early on.
1. 47 Tucanae...ED80/Canon 40D on Skywatcher EQ5
PHD autoguided
5x300sec, iso400, ICNR on.
2. Tarantula Nebula and surrounds... as above but 6x300sec, still can't shoo the blue hue
3. Flame and horsehead nebulae...12x300sec @ iso800
All images stacked in ImagesPlus 2.80 then faffed around with in PS!
Not too happy with this little bunch - they're a lot noisier than I had hoped for and needed too much processing for my liking.
Hi Doug, The images look pretty good to me. Noise is a problem even with OCNR on. Better results are achieved using darks in your processing without worrying about OCNR. Another handy program for noise reduction is Noiseware. They have a free version which is quite good but of course the purchased version is better.
Hi Doug, The images look pretty good to me. Noise is a problem even with OCNR on. Better results are achieved using darks in your processing without worrying about OCNR. Another handy program for noise reduction is Noiseware. They have a free version which is quite good but of course the purchased version is better.
Thanks Doug - some swear by ICNR, some prefer darks. I'm taking a series of darks right now so I'll see how I go.
Noiseware - I've d/loaded and installed the freebie, I like it. One pain the PS plugin doesn't process 16bit images, 8 bit only in the demo version.
I know Peter - I followed the Tarantula colour related thread with interest, but that's what the camera gives me, so that's what I've got to work with!
Regardless of the colour, I still can't seem to get an image I'm really happy with of this object - always ends up too noisy and "fizzy" looking. Don't know if it's the region, my technique, both!
Thanks for commenting
Doug
Don't take it to heart. I'm being totally non-PC and am calling a spade a spade
Actually I just tried getting get gamma levels in RGB right in your image...it was a bugger...and I gave up due insufficient data.
As +80% is being tossed by the camera, you probably need to go much deeper, split the RGB channels, stack the red ones, and use just one or two iterations of the G & B......just a thought...
Everything else looks good.
Quote:
Originally Posted by dugnsuz
I know Peter - I followed the Tarantula colour related thread with interest, but that's what the camera gives me, so that's what I've got to work with!
Don't take it to heart. I'm being totally non-PC and am calling a spade a spade
Actually I just tried getting get gamma levels in RGB right in your image...it was a bugger...and I gave up due insufficient data.
As +80% is being tossed by the camera, you probably need to go much deeper, split the RGB channels, stack the red ones, and use just one or two iterations of the G & B......just a thought...
Everything else looks good.
I've probably stuffed around with the image so much it's a lost cause Peter!
Thanks for the tips re processing - lots to think about
Cheers
Doug
great images there doug, what you can do in photoshop once the stacked image is loaded, open up levels, in the levels box bottom middle button, select that then click on a background and bangg colour all balanced!
Well tracked and focused images there Nice and deep too. Hope ya dont mind but I had a go at using Curves in PS on red channel only of the Tarantula shot. Curves alows red to be put in but without making too much of a red cast on everything else.
Scott
googled them straight away - both globular clusters.
I too am quite impressed with the piccies, but something in 47Tuc struck me as odd... the two faint clusters are roughly the same distance from 47Tuc, whereas in reality NGC152 is about twice as far as NGC121, so perhaps it might be something else....
I followed his recommendation, and tried Vizier... what you have there in your 47Tuc picture is indeed NGC121 on the right, but the one at upper left is more likely an exotic little glob known as Kron 3
I too am quite impressed with the piccies, but something in 47Tuc struck me as odd... the two faint clusters are roughly the same distance from 47Tuc, whereas in reality NGC152 is about twice as far as NGC121, so perhaps it might be something else....
I followed his recommendation, and tried Vizier... what you have there in your 47Tuc picture is indeed NGC121 on the right, but the one at upper left is more likely an exotic little glob known as Kron 3
I am sure that it is NGC152given mag as 12p mag, and Kron 3 is very small .
I have observed NGC152 on lots of occasions, but have not seen Kron 3.
Below is an entry in the ARGO NAVIS data base from andrew Murrell.
.KRON3*|00:24:48|-72:48:00|GLOBULAR|11.6|H0009;SMALL FAINT STAR CLUSTER NEAR 47 TUCANAE;MURRELL-ASNSW NOTES DID NOT RESOLVE IN 20inch;AKA ESO 28sc08;DISCOVERED IN 1956;IS 8 BILLION YEARS OLD;SIZE 2' ;KRON 7 IS 13' TO THE EAST
Ron
that flaming horse is stunning ,wish a had them under my belt 
