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Astrobdlbug

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Astrobdlbug last won the day on November 11

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  1. Had snow in Northants this afternoon, however the sky is clear for now, so with moon not rising until after midnight I have started aquiring Oiii for my narrowband horse project, by the look of it I am going to need a lot of subs, very very faint Flame visible. I may get a couple of hours before clouds roll in accroding to CO and Ventusky. Take it while you can I think as next week does not hold out much promise of any clear weather, Apps in my neck of the woods are red for whole week...certainly at night, few bright days in prospect,,ho hum Bryan
  2. The second process as HOO is great, is that one of the pixel math dynamic mix equations using the extracted channels ? The second process really showcases Melotte 15. Great stuff. Bryan
  3. HI Paul, great FOV on the bubble - in terms of learning more on NB processing side at least, if you use Pixinsight, I found this website explained some interesting ways to combine narrowband channels https://thecoldestnights.com/2020/06/pixinsight-dynamic-narrowband-combinations-with-pixelmath/ Bryan
  4. Very nice indeed - I captured this in same way as you in early September and used the same camera ASI2600MC but with a L-Extreme rather than Enhance dual band filter, and around same 5hrs integration and acheived very similar result as you have. However I created an image that mixed the 'RAW' with a false colour SHO process, I found that in this way you can retain the 'traditional' red for Ha but pull out the blue Oii in same image - I used starless versions of both processes to mix and then created a star overlay using a pixelmath dynamic mix that gave me interesting star colour. Its worth experimenting as its all narrow band false colour anyway and see if you can mix both processes togther lift the Oii BTW - I share your pain with framing, but acually the way you have left this makes a more open almost wide field style image, when I framed to get everything in the image it ends up looking a bit packed in and yours gives the main objects space, which is good as thats where they are.... Bryan
  5. Thanks Terry, it’s a project worth a blog to follow the ‘journey’…. BTW - any comment on the framing ? There’s lots of wispy bits above the horse but rolling clouds of dust below, not so apparent in this image, putting the horse in center give a bit of both - any creative inputs appreciated as Impactful framing subjects isn’t really one of my strong points in imaging. usually put it in the middle and get on with it…… Bryan
  6. Hi, I've been a bit quite recently, mainly due to the weather, but the beautiful clear night on Sunday/Monday got me back in the saddle. A number of years ago Sara Wagner published a narrowband image of the Horsehead and Flame nebula, it was as usual amazing, but also she kept a lot of green in the image which made for a lot of active discussions if I recall. I personally love the image and the colours she used. You can see it here https://www.swagastro.com/ic434-b33.html So I have taken this image as inspiration and I am going to try and create my version of this narrowband Horsehead image over the winter months, although my FOV won't give me such a wide frame - but I'll work with what I've got. Having not been out for a while there were a few gremlins, but the positives are that in changing over from ASI2600MC to ASI1600MM plus narrowband filters with FF/FR I had opportunity to break down the telescope and remove a section to make the FR work, I noticed that the Moonlite flange has grub screws that allows fine tuning of the focusser tilt and one grub screw was slightly proud of the flange, I backed it off so the flange would be flush. I also reviewed the backfocus and increased it by 1.5mm. As some of you know I have had issues with elongation of corner stars in recent images - the good news is these small tweaks seem to have resolved the issue as pixel peepers can see in image below - I want to get about 10-12 hrs of Ha to really go deep on the dust clouds and be the foundation for a SHO narrowband eventually. The most combined integration I have done so far is 17hrs on one panel (I did do 40 hours on my 4 panel Auriga widefield) , so I am hoping to break the 20hrs integration on this single frame project -could be a challenge given the weather we have had in recent years and also as Orion moves westwards my neighbour's tree/hedge blocks my view - I may have to go mobile to complete this project... This Ha image was taken with a 98% moon shining brightly but using the Antlia 3nm Ha filter has got me to this point , a 3 hrs integration with 36 - 300s subs. No halo around Alnitak, but ASI1600 microlensing is apparent and I've not quite got the masking around Alnitak quite right. So all you might get from me through the winter months will be variations on a Horse... Bryan
  7. Masked layers in photoshop is the technique I used the 30s subs and 3 different stretches of the integration creates a nice HDR gradient that can be brushed in - I use a additive method rather than the erase method. I am much more familiar using this in PS I’ve not used PI for a HDR image.
  8. Another winter favourite of mine - I like both renditions - but the SHO version highlights the transitions accross the nebula more clearly but the HOO more accurately reflects the vast amount of hydrogen in the nebula. Both very weel processed and I really like that you have got some of the 'tail' as there is so much dust and gas surrounding the Rosette that links it all the way across to the Christmas tree cluster which I think will be up to the right in your image orientation Bryan
  9. Evening all, well without going into a cloud moaning thread - there's one in the Lounge section - in my location it looks like solid red for at least next week - so I am working with even less data than the Horsehead and Pleiades for this image. I was hoping and should still get more RGB and some L-Extreme Ha for this project over the winter - but as it doesnt look like it will happen any time soon I've processed what meagre data I got last week. When I was out late on night of 4th/5th November capturing Horsehead data - I could not resist slewing down a bit and taking some subs of M42 Orion Nebula - it always makes me happy to see Orion in the sky and although M42 is so widely imaged - I always love finding something new in the nebula - its easy to get something captured as its such a bright subject , but with so much dust and gas around the dynamic range makes for a real processing challenge and always new techniques to try out. So here we have ASI2600MC (again) and 1 hour of data made up of 30 120s subs plus 7 30s subs to get some HDR to bring out the trapazium Bryan
  10. 👍 good to get my findings confirmed that there is a difference how each package handles gradients in a RGB image
  11. Such a recognisable and iconic image - you've captured the essence and your framing makes it just float in a sea of stars - another successful balcony image. For me if its a deep highly detailed image or a couple of hours this is one, if not the number one, favourite of mine in terms of astro image subject. Bryan
  12. Thats a fairly challenging target... I am hoping for an all nighter - clouds cleared just after 9pm and set to be clear until 5am... I am going to go for the winter trio in broadband RGB tonight More subs on M45 More Subs on B33 Horsehead Start M42
  13. Thanks Brian - Thanks Terry, it’s the combination of the exceptional ASI2600MC sensitivity and two relatively new software packages outside of PI. I should write the flow up. The other excellent tool is the light pollution removal in APP - I only started to use it with these RGB images and it’s amazing - dare I suggest better than DBE - Ah heresy!! I use Topaz Denoise, but only noise not sharpen and only blend about 40-60% of output into the image. I use the PS plug-in APF-R to sharpen - Again blend in a percentage. These tools along with the camera in my recent experience change the rules for RGB imaging under UK skies - at least that’s my opinion. Bryan
  14. So here we go again with another 2 hour wonder Captured an hour of Ha when I had the ASI1600MM attached with Antlia 3nm filter back iat the end of September when I was out deep into the small hours capturing data on Melotte 15. Just recently Captured 1hr 20mins with ASI2600MC on Monday night from 11:30pm as orion clears the trees to my south east Again push processed - took the RGB through PI with ez_DeConv and Denoise then used ArcSin stretch to begin with that pushes star colour then tweaked the stretch with Histogram Same approach with the Ha image. Lots of masks to control the extremely bright stars and of course Alnitak the biggest of them all Could say this is more a Happy snap than a considered deep integration of the subject - but hey its a hobby and doing rapid images like this keeps me occupied until I get in the mindset to focus on something deeper. Bryan
  15. thats amazing, definately a Dave Bowman moment - now where did I leave that monolith.... The structure on such a large scale is what makes imaging the night sky so rewarding - its almost like a nebula, but is billions of stars. Thanks for posting and creating such an amazing image . Bryan
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