Search found 358 matches

by Startrek
Sat Mar 16, 2024 8:55 am
Forum: Gallery
Topic: NGC 5128 Centaurus A Galaxy from Obs
Replies: 4
Views: 2877

Re: NGC 5128 Centaurus A Galaxy from Obs

Thanks Mike, Yes this Galaxy is definitely unique ( radio galaxy) and was discovered by the Scottish astronomer James Dunlop in 1826 from his crude timber observatory at Parramatta in Western Sydney , Australia ( prior to federation) My eldest son lived in Dunlop Street Parramatta a few years ago ( ...
by Startrek
Thu Mar 14, 2024 5:26 am
Forum: Gallery
Topic: NGC 5128 Centaurus A Galaxy from Obs
Replies: 4
Views: 2877

Re: NGC 5128 Centaurus A Galaxy from Obs

Thanks For only 5 hours of data I’m really happy with the result The resultant noise after dithering, stacking , darks etc.., was almost negligible ( de noise only 2 pixels but I could have skipped it ) Now dithering , I’ve tested dithering over many years and found dithering every sub is definitely...
by Startrek
Wed Mar 13, 2024 5:28 am
Forum: Gallery
Topic: NGC 5128 Centaurus A Galaxy from Obs
Replies: 4
Views: 2877

NGC 5128 Centaurus A Galaxy from Obs

First light capturing this galaxy from my dark site Obs with the 2600MM Location: South Coast NSW Australia New Moon Conditions : average seeing Captured over 2 nights ( first night had annoying local passing cloud which resulted in less imaging time window of opportunity) NexDome Obs 10” f5 Klaus H...
by Startrek
Thu Mar 07, 2024 9:56 pm
Forum: Feature Requests
Topic: slider brightness is very bright
Replies: 2
Views: 1295

Re: slider brightness is very bright

Hi Steve, Maybe adjusting the contrast and brightness on your screen could help a bit ? I suppose everyone’s eyes are different, the sliders don’t bother me too much Also if you had a big bright nebula filling your screen , the sliders would not be so noticeable. Your beautiful galaxy image due to b...
by Startrek
Thu Mar 07, 2024 9:14 am
Forum: Image Processing Troubleshooting
Topic: Sh2-308 Dolphin Nebula Processing
Replies: 6
Views: 1758

Re: Sh2-308 Dolphin Nebula Processing

Hi Mike, Thanks We shall see how this one pans out , yes this object is certainly challenging under less than ideal skies ( 27 of my Oiii 5min subs were under a near full moon as well ) I’ll ignore Guys notes relating to Bi Color and the Steve Cannistra’s link as I’m baffled as well I’ll play around...
by Startrek
Wed Mar 06, 2024 11:28 pm
Forum: Image Processing Troubleshooting
Topic: Sh2-308 Dolphin Nebula Processing
Replies: 6
Views: 1758

Re: Sh2-308 Dolphin Nebula Processing

Hi Mike, Thanks I must have missed the composite color scheme below for Bi Color ( Mono ) ….. "L + Synthetic L from RGB, R(GB)(GB) (Bi-Color)" creates a synthetic luminance dataset from Luminance, Red, Green and Blue, weighted according to the exposure times provided by the "Total Exposure" sliders....
by Startrek
Wed Mar 06, 2024 9:26 am
Forum: Image Processing Troubleshooting
Topic: Sh2-308 Dolphin Nebula Processing
Replies: 6
Views: 1758

Re: Sh2-308 Dolphin Nebula Processing

Hi Dietmar, Thanks for your suggestion I just found Guys notes on Steve Cannistras HOO composites , so I’m not sure whether the OSC Bi Color option will work with just 2 individual channels (Ha and Oiii ) from Mono data sets to use for HOO The Bi Color option uses all three channels loaded with the ...
by Startrek
Mon Mar 04, 2024 11:38 pm
Forum: Image Processing Troubleshooting
Topic: Sh2-308 Dolphin Nebula Processing
Replies: 6
Views: 1758

Sh2-308 Dolphin Nebula Processing

I’m still gathering data ( Ha and Oiii ) on the Dolphin Nebula and would like some processing tips prior to completing the capture. This object is primarily Oiii with Ha accents Any suggestions on how would I load Compose to achieve a good narrowband composite ( remember there is no Sii ) that refle...
by Startrek
Tue Feb 27, 2024 1:07 am
Forum: General Discussion
Topic: LRGB or RGB?
Replies: 6
Views: 945

Re: LRGB or RGB?

Hi Mike, An interesting topic Gee this LRGB vs RGB thing has been thrashed around on so many forums over many years and I still don’t think there’s a definitive answer , too many variables involved and so subjective. However thanks for raising it in the ST forum. With my limited experience with Mono...
by Startrek
Thu Feb 22, 2024 9:51 pm
Forum: Gallery
Topic: NGC 3324 Gabriela Mistral Nebula
Replies: 7
Views: 1108

Re: NGC 3324 Gabriela Mistral Nebula

Thanks for your suggestion and advice As I mentioned I’ve had success with 1.8 HDR Tame which is similar to DSO core in 1.7 HDR However , I’ve tried to emulate 1.7 Optimise Soft ( and even Optimise Hard) in 1.8 HDR and it ends up unsatisfactory, it doesn’t accentuate specific structures and target k...