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Catanonia

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Posts posted by Catanonia

  1. 37 minutes ago, ONIKKINEN said:

    No need to split afaik, just split the iamge that the stacker spits out before processing anything on it and you get the most bang out of the binning process. (integer resample = Bin)

    I re-did with a 2x integer re-sample. The colours are slightly different as I might have added a little more saturation.

    It makes a "small" difference

    M51 2x Integer Sample.jpg

    • Like 1
  2. 4 minutes ago, ONIKKINEN said:

    Thats a nice M51, but i think there is more to be taken out of the image if you do somethings a bit differently.

    Looks like BXT has only tackled the core/very high SNR regions and so there is a "disconnect" in the visible levels of detail in the sharp core and soft everywhere else on the galaxy. Try integer resampling at least x2, probably x3 and you will get a much sharper image. BXT will not sharpen the soft parts of the image because from its perspective the too high a resolution image has nothing to sharpen. That said, my limited understanding of BXT is that it prefers not quite properly sampled images to properly sampled ones, so you might want to be a little bit oversampled for BXT to do its thing best. But still at least 2x or 3x integer resample will work.

    Yes noticed this myself. Will give your suggestion a go and see what happens. 

    Can you simply integer resample the integration of the OSC after calibration and debayering, or do I need to split it into LRGB ?

  3. 1 minute ago, Vroobel said:

    It's one of the best M51 pics I ever saw. 

    And now I really don't know whether to go into 2600MM + narrow filters or 2600MC (also with some filters like L-eXtreme). 😳

    Thanks

    It is a hard decision. OSC is much easier if you are new to it all, but Mono will give better results.

    I used to use mono, but the switch to OSC with modern camera's makes the hobby much more rewarding for me with limited night sky time due to the horrid weather in the NW of England.

    I have the lEnhance filter too, that I can use (not in this image) if I image large nebula's with my RASA8, but that filter will loose you star colours and the blue in the nebula's

     

    • Like 1
  4. I have been imaging for many years, but there is always time to learn some new tricks with old data.

    So I picked up a BlurXterminator trail and learnt the new spectro / gaia colour calibration routines and put it to work on my M51 data I collected last year with my RC10

    I am blown away with the improvement learning these 2 routines have given me with the image below.

    I did not even take my time on this processing, probably about 1 hour

     

    Deconvolution as always been a dark art for me, and I have never done it on my linear images and have therefore always suffered. BlurXTerminator (if used carefully) just takes this whole hassle away.

     

    Details

    • M51 13 hours from Bortle 6 skies over 3 nights
    • Scope - RC 10 F7 2000mm FL on a EQ8R-Pro
    • Camera - ZWO 2600MC Pro OSC and no filters
    • ASI Air Pro and 120mm OAG guide
    • 7.3 Hours in 2m subs OSC
    • 5.6 Hours in 5m subs OSC
    • Processed entirely in PixInsight

    M51 Combined Effort 2m and 5m.jpg

    • Like 23
  5. On 16/02/2023 at 09:25, gorann said:

    I hope you do not mind that I took the liberty of using StarXT in PS on your image to see if the starfield could be suppressed more. It allowed me to boost the nebulosity and then bring back the stars at a much suppressed level using a curve on the star layer. It was a quick and dirty try and obviously it would be better to do this on a 16 or 32 bit version.

    Cheers, Göran

     

    Goran,

    Could you give me a rough workflow on the processing you did please.

    Top level will do, I can work out the rest

    On 16/02/2023 at 09:25, gorann said:

     

     

  6. On 16/02/2023 at 09:25, gorann said:

    I hope you do not mind that I took the liberty of using StarXT in PS on your image to see if the starfield could be suppressed more. It allowed me to boost the nebulosity and then bring back the stars at a much suppressed level using a curve on the star layer. It was a quick and dirty try and obviously it would be better to do this on a 16 or 32 bit version.

    Cheers, Göran

    Not a problem and I am definately missing a lot of detail, thanks

    I decided to go back on this too and also use the new Spectral Colour Calibration in PI.

    Looks a lot better with a little more effort in the lum portion of the image

    Amazing how your processing gives such a different outcome. This is what I love about this hobby, everyone is an artist :)

    Still a lot to learn, even after 8 years :)

    On 16/02/2023 at 09:25, gorann said:

     

     

    Flaming Star 5 hours.jpg

    • Like 1
  7. 41 minutes ago, gorann said:

    A lot of IFN around there indeed! I It reminded me of this image by Kees Scherer:

    https://www.astrobin.com/389783/

    132 hours and 15 panels with an Esprit 100. So you really saved some time with the SY135.

    wow, that image was some dedication :)  Sometimes I wonder whether to buy a camera lens for wide field rather than doing mosaics. 

    The only real benefit I see to mosaics is if you want to do large prints with them, otherwise it only serves the pixel peeker / zoomers out there ;)

     

  8. 1 hour ago, gorann said:

    You really captured a lot of the illusive blue reflection nebula, but then you hava a RASA of course! Have you considered trying Starnet2 or StarXT on the image to bring out more of the faint nebulosity without stretching the stars?

    Thanks buddy, yeah the RASA is a light bucket.

    I used StarNet2 in PI to remove the stars before processing the nebula and then added the stars back again after the work.

    Still learning some new techniques and desperately trying not to over process the data that I have been guilty of previously.

    • Like 1
  9. I recently bought a new cable router 3D print from the YouTuber Steven Morris (well worth the £12 download if you have a 3D printer)

    I am quite pleased with the results especially considering I took the RASA 8 apart to clean the inside of the corrector lens, mirror etc and had to hand collimate it myself. 

    Hint, a OCAL collimator works well if you understand the physics

    I have a little camera tilt that if you really pixel peek you will see. I will tackle over the summer 

    So here is the Flaming Star Nebula

    Details

    • RASA 8 on SW EQ8R 
    • ZWO 2600 MC Pro OSC with no filters
    • 5.5 hours in 3min subs 1xbin
    • Bortle 6 skies
    • All processed in PI start to finish

     

    Flaming Star 5 hours.jpg

    Steve Morris RASA 8 Guide.jpg

    • Like 6
  10. 2 hours ago, Astroscot2 said:

    I suspect its an internal reflection of Alnitak due to collimation or tile somethere in the image train, stars look a bit distorted.

     

    Mark

     

    Mark

    I am pretty sure it is an artefact as it appears very very faintly on some of the other mosaic images in exactly the same sensor spot. This would indicate something in the image train.

    The movement was due to images not being exactly pixel perfect aligned. A quick alignment of the subs showed it to be in the same spot of the sensor each time. Just some images brighter than others.

    It appeared suddenly in this section of the mosaic due to a meridian flip (noting the times) and hence moved to a different part of the sky where this part of the sensor imaged.

    Definitely not (as expected) aliens :)

    Now to try and work where in the image train the problem is. I suspect something rogue on the sensor glass, but hard to believe as it has not be dismantled for months and never seen it before.

    Will check the flats too

    • Like 1
    • Checked Stellarium, nothing of interest
    • Other subs in different parts of mosaic taken 3 mins before don’t show this on image. So not image / camera train as far as I can tell.
    • artefact appeared after 30 mins of subs where it did not appear
    • camera and sub specs not changed during this image train.
    • it appears to move by about 100 pixels back and forth against the star background.
    • Appeared in roughly same place fore last 2 hours.
    •  
    • totally confused
    •  
  11. I have had this blue area that looks like a planetary nebula suddenly appear in one of my images that was not there 30 mins ago.

    I have no idea what it is and am racking my brain, comet, flare, planet, plane, satellite.

    but it suddenly appeared after 30 mins of subs and moves slightly against the stars.

    it does not appear in any other images that I am doing as a mosaic.

    I am sure it is not something undiscovered, but a 2nd opinion check is worth a aslk

    see the image attached. Go east from the horse head and you will see a circular blue structure at looks out of place.

    image is a single 3min 2x bin unedited sub from rasa8 and 2600mc pro

    As said before, does not appear in any other panels of my mosaic so ruling out image train ‘ camera problems and it is moving randomly (outside of dither range)

    if I have found something, i hope I have booked my bunker place

    thank you.

    B75633AD-F23F-4FDC-8E08-E16A766D968E.jpeg

  12. 18 hours ago, ollypenrice said:

    That's coming together very nicely. Yves Van Den Broek shot a vast mosaic also including the NAN but heading the other way, up to include IC1396. The large scale structures are fascinating throughout this region.

    Great stuff.

    Olly

    Thanks Olly, much work to do on processing all of this data.

    I have another 30 panels for the star field, not sure if I am going to need to use them, time will tell.

  13. Spent about 3 hours this morning on the mamouth task of stitching these panels together.

    Messing around with DNALinearFit and other tools, trying to get the panels to match considering they are from different conditions over the course of nearly 3 months.

    Here is a 1st pass screenshot of my progress of stitching. Still a few issues around the middle of the image to work on, but the key here is to save your work regularly and give the directories good meaningful names for when you constantly go back to a previous.

    (Only screenshot at this stage as the image is HUGE !!)

    30 Panel 1st Screenshot.jpg

    • Like 1
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