Bicolor Keyhole

[cometcatcher (Kevin)]

What a fantastic image!

[Benjamin (Ben)]

To add to the chorus... Incredible! Love the colour scheme too.

[RyanJones]

That’s a really beautiful image Marc. I love the colours and their subtlety.

[multiweb (Marc)]

Originally Posted by John K

Great image Marc,

A lot of detail there - certainly has a Hubble Image type feel to it.

Clear skies.

John K.

Thank you John. Yes it does a bit. That HST field is very popular.

Originally Posted by JA

Superb Marc. I love the colour

Best
JA

Thanks mate.

Originally Posted by Retrograde

That's gorgeous Marc!

Thanks a lot Pete.

Originally Posted by RichardJ

Absolutely fabulous.
Well done!!!

Richard J

Thanks Richard.

Originally Posted by cometcatcher

What a fantastic image!

Thank you very much Kevin.

Originally Posted by Benjamin

To add to the chorus... Incredible! Love the colour scheme too.

Thanks Ben. Colours turned out alright.

Originally Posted by RyanJones

That’s a really beautiful image Marc. I love the colours and their subtlety.

Thank you Ryan

[Nikolas (Nik)]

Beautiful detail there, astonishing really

[marco (Marco Lorenzi)]

Absolutely fantastic Marc, well deserved accolade, you can even see the infamous "finger of god" resolved One of the very best I have ever seen of this area
Cheers
Marco

PS can you provide more details on OTA and Camera?

[multiweb (Marc)]

Originally Posted by Nikolas

Beautiful detail there, astonishing really

Thanks Nikolas.

Originally Posted by marco

Absolutely fantastic Marc, well deserved accolade, you can even see the infamous "finger of god" resolved One of the very best I have ever seen of this area
Cheers
Marco

PS can you provide more details on OTA and Camera?

Thanks Marco.
It's a QHY9 mono guided on a G11 with a lodestar. 5min subs.

[Paulyman (Paul)]

Wow! That is incredible.

[irwjager (Ivo)]

Wow Marc, lovely image indeed!

Strange about how you say you get better results from a highly oversampled dataset... Some oversampling can be useful for the purpose of deconvolution, but if your dataset is already oversampled at native resolution, I would expect a drizzled dataset to be quite a bit inferior in terms of signal fidelity.

Another possible issue with drizzling (unless done very precisely and copiously) is the potential for correlated noise to come into existence. The latter is infinitely more difficult for algorithms of all sorts (decon, noise reduction) to distinguish from detail. As a result such algorithms may have trouble working properly.

To illustrate, thanks to the oversampling in your JPEG, I was able to restore a fair bit of detail from even the processed/stretched 1:1 image;

https://download.startools.org/Tutor...eb_NGC3372.jpg

(detail can be corroborated with this recent APOD) I can only imagine how much can be restored with the actual linear dataset!

As for the trouble you're having with the star mask; in ST, to create a star mask that includes large contiguous overexposing areas,
Under Mask -> Auto, make sure your Selection Mode includes 'Highlights > Threshold' (e.g. 'Highlights > Threshold' or 'Light Features + Highlights > Threshold').
Then lower 'Threshold' to the brightness value from where you wish to select highlights (e.g. 85.00 would select any pixels brighter than 85% of pure white).

If you got the SII data on the target already, you could consider adding it just for the purpose of coloring, while sticking with the Ha and O-III for your luminance. Color data doesn't have to be amazing to be useful. I for one would be really keen to see this amazing detail in an RGB:SHO/HST palette rendition! Pretty please?

[multiweb (Marc)]

Originally Posted by Paulyman

Wow! That is incredible.

Thanks Paul.

Originally Posted by irwjager

Wow Marc, lovely image indeed!

Strange about how you say you get better results from a highly oversampled dataset... Some oversampling can be useful for the purpose of deconvolution, but if your dataset is already oversampled at native resolution, I would expect a drizzled dataset to be quite a bit inferior in terms of signal fidelity.

Another possible issue with drizzling (unless done very precisely and copiously) is the potential for correlated noise to come into existence. The latter is infinitely more difficult for algorithms of all sorts (decon, noise reduction) to distinguish from detail. As a result such algorithms may have trouble working properly.

To illustrate, thanks to the oversampling in your JPEG, I was able to restore a fair bit of detail from even the processed/stretched 1:1 image;

https://download.startools.org/Tutor...eb_NGC3372.jpg

(detail can be corroborated with this recent APOD) I can only imagine how much can be restored with the actual linear dataset!

As for the trouble you're having with the star mask; in ST, to create a star mask that includes large contiguous overexposing areas,
Under Mask -> Auto, make sure your Selection Mode includes 'Highlights > Threshold' (e.g. 'Highlights > Threshold' or 'Light Features + Highlights > Threshold').
Then lower 'Threshold' to the brightness value from where you wish to select highlights (e.g. 85.00 would select any pixels brighter than 85% of pure white).

If you got the SII data on the target already, you could consider adding it just for the purpose of coloring, while sticking with the Ha and O-III for your luminance. Color data doesn't have to be amazing to be useful. I for one would be really keen to see this amazing detail in an RGB:SHO/HST palette rendition! Pretty please?

Thanks for the feedback Ivo. Yeah what I did is a bit unconventional. When I see your result I realise that I've been pretty much shooting myself in the foot. I've got the AO working tonight and I'm getting some good Sii. I'll dropbox the master FITS for you when stacked and email you the link (usual place). I did send you the Ha channel a while ago didn't I? If not let me know. I'll send you the Oiii and tonight's Sii.

[RobF (Rob)]

Fantastic work Marc. Has really lived up to the promise of the early images you put up. Definitey one for the pool room!!

[multiweb (Marc)]

Originally Posted by RobF

Fantastic work Marc. Has really lived up to the promise of the early images you put up. Definitey one for the pool room!!

Thanks Rob. Taking shape yep. Got the AO in the imaging train somehow and tested last night with PHD2. Still have to rtfm but everything connected and didn't crash. The cabling looks like it's out of a frankenstein movie but results are promising. I had some flex with the weight though so I have adaptors made. I'll focus with the primary like the C11 eventually and get rid of the moonlite to have a solid mounting at the back. I got 4h of very noisy Sii but the stars are much better than without the AO. I was guiding at 2Hz but could have gone a lot faster. I just don't know how at this stage.