gorann

I also do not like green that much in astrophotos so I avoid the Hubble palette and use HSO instead since the Sii signal is often rather weak. Then I tweak the green towards yellow which looks a bit more natural to me.

A very nice general impression, and the last one for me too Steve. I was qurious about how well the mosaic-process worked so I could not stop myself from a bit of pixel peeping. Sorry! There are some rather odd artefacts here and there, including colour falling outside the stars. I have hard to believe that it is the fault of the Esprits and think it may have something to do with the stacking or mosaic procedure. I do all of that in PI and have not seen such artefacts there. However, doing mosaics in PI is a bit more manual (at least for me that do not know all the PI tricks). I hope you do not mind me dissecting your image - but since also have dual rigs I am on the look out for good ways of doing mosaics. Cheers, Göran

I am sure it works but that thing looks like something at least I could accidentally tip over🥴

Also present in my processing of 2016 Liverpool telescope data👍

I downloaded it and tried it on the HSO image I just made from the present IKO data release (Cave Nebula). I had to use it on my new Mac where I have the latest OS (11.6) and PS-version. Would not work on my old Mac (OS10.10) with PS CS5 (which is still my favourite). The star removal appears to be virtually without any annoying artefacts (except the smooth area around the biggest stars but that must be unevitable). Cheers, Göran Here is the original Here is the Star Xterminator version Here it is with stars blended in (layer and curve in PS) at a much reduced level

I just found this thread on an new RC-Astro star removal plug-in for PS: So I tried it (first image below) and then blended in the stars at a much reduced level compared to my post above. I really like the result. Could not find many annoying artefacts.

Here is my first attempt. Great almost noise free data. In cotrast to the other entries here I used a HSO palette and tweaked it towards a HaRGB-like palette to give it a more natural look. Processed in PI (a little) and PS (a lot). Cheers, Göran

Not sure how we could avoid oval halos if they are caused by the circular cables going out on one side, unless we make two more dummy circles oriented like clover leafs. But the net effect of that would be bigger halos.

I think your camera behaves similar to my ASI2600MC so on a bright area like this I would not see a need to go longer than 2 min if you use it at gain 100, especially since you have more light pollution than I have (Bortle 2-3).

Looks very promising. I would add some shorter (maybe 30s) exposures to save the core of the Iris, which now looks a bit blown out. However, it could also be a result of the stretching of the histogram. What does it look like before you start stretching?

I was thinking, why not just keep them in there as a trade mark of the RASA with a circular cable arrangement, just like star spikes on Newtons and the Hubble. It may drive out man from the East nuts, but.....

I have to agree with Wim, I think you are asking too much of the scope. My Esprit 150 for example can just about illuminate my ASI6200 using the dedicated 1x flattener, but with the dedicated 0.77x reducer/flattener it can only be used up to 34 mm image circle, https://www.teleskop-express.de/shop/product_info.php/info/p12689_Skywatcher-0-77x-Focal-Reducer-and-Flattener-for-Esprit-150-ED.html. I have hard to believe that the ES127 have a larger corrected field than the Esprits. In the end you may have to crop and settle for something like APS-C format. I seem to remember that you can tell the ASI6200 to run in APS-C format (so smaller files to handle).

I just use a curve to darken the halo in PS, then use it as a layer and brush tool to darken it selectivelly where it protrudes. Voala - a round halo!

I have to say I did not notice the skewed star halos and neither did I get what Vlaiv tried to say. It does not disturb me much, but yes, I get a bit of those halos too with my RASAs and have not yet messed with the cables to possibly fix it. It is easy enough to fix in processing, at least in PS.

You may also try reducing the distance if it is possible. I notised that the shape of the corner stars does not allways tell what direction to go with the distance.

Yes, you clearly have that odd PN!

Very nice indeed Olly! Magnificent star coulour. How did the mount behave that close to Polaris? Is LBN617 the central structure in the image? I would think all of what is in there could be classified IFN. To the left you have caught the reddish squid-like nebula that I also have in an image of Polaris: https://www.astrobin.com/gvntvo/K/

Very nice image indeed! Many would be happy if their 100ed image looked like this. I do agree with Olly that there may be more faint stuff to be drawn out ot the image. If you use PS you can run "Equalize" on a copy of the image to see what faint stuff is there (it is an analytical tool and not unusllay used for processing)

Yes, lovely image and perfect processing! By the way, your FOV is wide enough to include a very unusual PN (PN G100.4+04.6) to the right of the nebula that recently happened to be highlighted by two independent posts on Astrobin by Gary Imm and Peter Goodhew. See if you can find it: https://www.astrobin.com/0dolq1/ https://www.astrobin.com/f2pr5t/

This is a merger of data from two RASA images, Sh2-206 (aka NGC1491 and LBN 704) and Sh2-205 from 20210301 and 20210926, so kind of a partial mosaic with overlapping data for Sh2-205. This was not at all planned and I had forgotten that I also had Sh2-205 in the corner of my Sh2-206 image. Sh2-206 is the rather bright nebula in the bottom left corner, while Sh-2 205 occupies the top right quadrant. Totally 160 x 5 min, so about 13 hours with RASA 8 and ASI2600MC using an IDAS NBZ dual band filter (Ha and Oiii). Processed in PI and PS. All from my home obsies. More details on the images here: https://www.astrobin.com/hlxv7p/C/ https://www.astrobin.com/ngthuw/B/ Cheers, Göran

That's it Steve! And I found another advantage with a dual set up. If the stars in a corner looks a bit misshaped from one scope, I just pick them from the other.

Thanks Wim! Yes I cannot stop myself imagening creatures in images. Also quite striking to try different orientations. Turn it 180° and it looks like a sea creature coming up to gulp air:

The moon is out and I have had two clear nights using the IDAS NBZ filters (Ha+Oiii dual band) on my Dual RASA rig. Here is the result of the second night. This is a fairly large but mostly faint Ha emitting nebula from the Sharpless catalogue, therefore suitable for the FOV of a RASA. To me it looks like a horse drinking water with the muzzle reflecting in the water surface, so the Horse Head Nebula of Camelopardalis. Most of the Ha emission in the image is quite faint so I binned it 2x2 (using Superpixel debayering in PI). 9 hours of integration at f/2 also helped. So, two RASA8 with ASI2600MC and IDAS NBZ on a Mesu200. 2 x 55 exposures of 5 minutes (gain 100), totally 550 minutes (about 9 hours). Processed in PI and PS. Cheers, Göran

It looks like the filters also came with a large serving of dust! Not good advertisement for Baader this. So clearly I should be happy having the previous generation of various Baader filters. Last week I just could not resist the temptation of buying a second-hand set of 3nm Astrodons (O, N, S, Ha) in mint condition and at 1/3 of the new price. Unfortunately they are 1.25 inch so not for my wide field images. My thought is to use them to hunt planetary nebulae with one of my SCTs.

Thanks, much appreciated! I agree - the bows add a lot.