geeklee

Hi @blinky It's two Sharpless objects - Sh2-115 and Sh2-116. Hope this helps. Nice image BTW - really nice detail. EDIT: These were both obtained in PixInsight (FindingChart process and AnnotateImage with Sharpless catalogue selected). Click the green '+' to add additional built in catalogues.

Thanks for the additional info Dave. Agreed on the MBB in APP - I've found it excellent for mosaics and echo your workflow above. I've found greater success bringing each master panel into PI and running those processes above before building the mosaic in APP afterwards.

Super result Alan. After a little time I could see the spiral structure you mention. Great detail and colour, with the Ha additions well worth it. 30 hours in the UK too. Always worth extra appreciation 🫡

What a project and final result Dave - fantastic work, no wonder you're pleased with the final outcome. This is a perfect size to enjoy the wider views and still showing detail viewing at full resolution. I've seen you mention previously how much you value this tool. Does APP do anything equivalent with it's LNC or is that an unrelated process? I primarily work within APP pre-processing but will think about opening up the documentation for NSG and investigating further.

Excellent result Oskari - great detail in the core, lovely subtle contrast in the outer edges of the main area of M27 looking like folds and holding a super depth... then bringing those faint outer shells out so well (without any sort of forced look to my eye).

Agreed, it will have had an impact in RGB, and to a lesser extent in narrowband. Looking at the tidy, low noise background, there's probably a touch more to stretch in those faint shells - tricky against the bright core though. Great stuff mine is also very accommodating with "family and life stuff" when rare clear skies arrive, I'm always extremely grateful. I don't think I've ever seen as many clear nights as that in a row though 🤣

Nice job Chris! Both really good images. How did the dual band filter image itself look Vs the combined as far as shells and detail? Serious time spent too, very impressive! Hindsight is great It's always worth experimenting and the resulting RGB image is still very nice, with the faint shells still just coming through nicely out the background.

Fantastic Robin. It's a nice change to see this with pure OSC showing all the dust and darkness in the background contrasting the Ha.

Great start Chris! Especially with no narrowband filter - clearly showing NGC7000 and surrounding nebulosity. On a colour camera, a duo-narrowband filter would be useful for emission nebula - helping isolate just that Ha and OIII signal better. There are a huge variety available across the cost/quality spectrum.

Excellent result Alan - plenty of depth in the Ha of the Bat and subtle detail throughout the squid. Really interesting analysis of your OIII master and how you've brought that through into the HOO image to pepper it with additional OIII/dust/reflection elements throughout. Took me a minute to find this - top left?

125 minutes of OIII, Samyang 135 + 183MM camera @ ~F2.8. Mix of B4 and B6 skies. A single 300s sub: @Adreneline I always thought we got more for this mosaic pane back in 2021? This was all I could find in my archive! Perhaps it needs revisiting

That's a fantastic result Clarkey. Great variation in signal and with a longer focal length too. Very nice! For anyone wondering about the ingredients - Clarkey's processing skill aside, these are certainly two - skies and speed. A great combo. That looks great too Steve. Just 70x3 but it's coming through clearly against the Ha. A great RASA object

Hope you can rescue something Alan. The squid OIII looks fantastic for only 7 hours in nautical darkness 🤞 The flying bat is looking good too.

Superb result @Big Ian 65 Some real stand outs there (e.g. M51, M101, M27) but all enjoyable. There's something about an EAA M27, being so bright, I remember it as one of the first objects I captured with SharpCap when starting out.

Great to see some significant detail that these have to offer Dave. And even smaller galaxies coming through as well that would barely register or being about a pixel on a shorter focal length. Nice one.

I've imaged narrowband in nautical darkness before and been happy enough with the results. Never tried broadband though - I'm interested how this compares. I'm good with a a fairly small moon far away from an object in broadband but even then I try and choose wisely... although that sounds like there are plenty of clear nights and picking makes any difference 🤣 We'll be exiting nautical dark soon, sadly.

I had a few attempts myself and still couldn't bring the full Ha signal through - although it did enough to enhance things. Here was the Ha: In the end I used the Continuum subtraction method but with some masking as well at the end as I couldn't get a great result. It was only 4h Ha though (6nm, 533MM)

They are both excellent Chris. Really good colour and detail on M106 and you can just start to see the Ha regions popping out, including the fainter stuff. I recently shot this with my 150P-DS and some Ha helped even though it wasn't much. If you can get a lot - it reveals some really great structures.

Fantastic work so far Charles. The detail is excellent, especially on NGC 5474 - usually a bystander. Good luck with any future plans for colour.

That close up, FOV is crazy David, awesome Is that still with the reducer? Hope you get something before summer arrives. Seeing it on the AZEQ6 has me reconsidering looking at one of these - it's (unsurprisingly) still a bit of a beast all in!

Another very good revision Chris - they've definitely all had their clear merits, with an incremental change along the way. I do prefer the colours here although just personal preference. Great job with the tidal tail on NGC 3628. Any other commentary & feedback is just of the pixel peeping variety - I won't bore you with that

Thanks Steve. Only 12? Even using copious binning/resampling to keep the integration down, it would be a hell of a task bringing it altogether. The gradients alone would likely drive me to despair. Still, 2 or 3 panels a year maybe? 😉

Thanks Chris. I scripted into Simbad (I say scripted, it was minimal) a query for every quasar found by TypeCat. Brought this data back into Excel and did some cell work to generate a new custom catalogue that included the red shift values in the "name". Once I had this, I created an annotated image and iterated over this process, removing all quasars from the catalogue file below a redshift where I had something in the image. Then created another annotated image with the latest list and did the same again, and again... TypeCat can be found among the script set here if you don't already have it. QSO is the designation to look for in the list. In AnnotateImage, you can add ("+") a custom catalogue where you point to the output from TypeCat or just a text file you've created yourself (tab delimited). You can create all sorts of custom annotations this way.

The better quality the data that goes in, the better result out but there is a limit (our own limit!) with limited clear sky time. I try and get it the best I can with no glaring issues. I collimated in Sep/Oct last year and haven't touched it since. While my imaging rig (scope+camera etc) stays together, I do have to setup and tear down onto the mount each time I image. Hope you get a chance before we're into summer - look forward to seeing your results.

That's a great revision Wim - the Ha less prominent, but overall a step up in many areas. Interesting approach for Ha combination you've listed above, I will try and keep a note of this to try myself - thanks for sharing. My continuum subtraction attempts have been mixed - my latest one I ended up masking in the final step to help in the places I wanted it. A little unorthodox.