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Found 13 results

  1. alan4908


    From the album: Deep Sky III

    A second attempt at the Witch’s Broom Nebula (NGC6960), this time in narrowband. It took me 3.5 months to acquire the data, which was caused by a combination of poor UK weather and the partial obstruction by trees at my location. Although imaged in narrowband, I tried to go for realistic looking colours so started with Ha mapped to red and OIII mapped to blue with a synthetic green generated from a Ha/OIII mix. After a few hue adjustments, I ended up with a colour image which mainly gave blue/reddish stars and nebula. I found that detail could be boosted by creating a super luminance image from the individually stacked narrow band stacks and then deconvolving the result which I then blended into the colour result via Pixinsight’s LRGB process. The image represents 16.5 hours integration time.
  2. A second attempt at the Witch’s Broom Nebula (NGC6960), this time in narrowband. It took me 3.5 months to acquire the data, which was caused by a combination of poor UK weather and the partial obstruction by trees at my location. Anyway, better late than never.... Although imaged in narrowband, I tried to go for realistic looking colours so started with Ha mapped to red and OIII mapped to blue with a synthetic green generated from a Ha/OIII mix. After a few hue adjustments, I ended up with a colour image which mainly gave blue/reddish stars and nebula. I found that detail could be boosted by creating a super luminance image from the individually stacked narrow band stacks and then deconvolving the result which I then blended into the colour result via Pixinsight’s LRGB process. The image below was taken with my Esprit 150 and represents 16.5 hours integration time. LIGHTS: Ha: 15, OIII: 18 x 1800s; DARKS:30, BIAS:100, FLATS:40 all at -20C.
  3. My first DSO with my new scope (Esprit 100ED) taken over a couple of nights this week with a modified 450d. It was stacked with only a little bit of processing in AA6, 42*300s subs, darks, bias and flats all captured using APT. PA was done using Sharpcap Pro and guiding is with a ZWO 60mm guidescope and an ASI224MC. I dither between each sub so don't know whether I should stop using darks, also I need to sort out my guiding as it could be a lot better. My processing skills need to be improved a lot, I'm considering getting Pixinsight, I've seen lots of great pictures using it, how easy/hard is it to learn the basics to get a reasonable result from? Here it is let me know what you think good or bad.
  4. Well, how blessed have we been with this weeks weather? Its been clear every night this week (apart from tonight) so it gave me the opportunity to expand on the Veil widefield I did a couple of weeks ago by adding two more panels and increasing the exposure to 2.5 hours per panel. I then moved on to adding some OIII, at 2 hours per panel, but only managing to get four of them before I started to get a bit weary of imaging the same thing for a whole week - Andromeda is getting into a good position now so I was keen to make a start on that (have ignored it for the last two years) with a 4 pane mosaic. By the time I packed up (3am) there was a glorious sight in the East - Jupiter, Orion and Taurus.... so much to look at, so I decided to whip out the bins for a bit of a gander before going off to bed. Shame though, as that will be the only time I see M42 until about December as from now til then it will disappear behind a massive tree. Ive cropped the Ha into smaller chunks for a bit of pixel peeping. The NEQ6 performed well on this, hardly any flex, good PA obtained via polarfinder.exe, and a PHD graph as flat as a flat thing. The only minor scare ive had is when the DEC axis started making a very unhealthy chattering sound last night - as if something wasnt meshing properly. Had a little mess with the end float, and it seems to have made it go away.... for now. God, how hard is it to remove the end float cover without the correct tool?? Very hard, I ended up getting out the screwdriver and hammer to tap it loose. I hope the 6 panel version displays ok, it looks a little different when rescaled to fit the browser. Veil Nebula Complex: Ha version: 2.5 hours per panel, 6 panels HOO version: 2.5h (Ha_Red), 2h (OIII Green/Blue) ED80 (0.85x), Atik 314L+, NEQ6 Setpoint: -10 Calib: Flats & Bias Guiding: Excellent Thanks for looking! Rob First, the Ha widefield - 6 panels worth: Next, a crop of the Broom: Then, a crop of the Wisp: Now, a four pane colour version with OIII data, note how much more detail and separate filaments the OIII adds, well worth getting. Oh, and synth green version for those who like that flavour Finally, a little nibble at M31, just 40min per panel (3 panels). A really good test of the new CCD CLS 1.25" filter, which did a good job in giving me a nice, low background level on my subs. I will return to this at a later date to have a proper go at it.
  5. The veil Nebula, one of my favorites! I've previously captures this one, but felt i had a lot to improve. This is another attempt on capturing it and consist of a good mix of data captured over several nights. Finally i feel like i'm starting to get somewhere with this target! It's all captured with the QHY5L-II-M camera, unguided with a 50mm F/1.8 and a 135mm F/3.5 lens. Both are old manual Olympus OM lenses. Exposure: 10x 10 min OIII - 50mm F/1.8 (edit: F/2.8, not 1.8) 15x 10 min Ha - 50mm F/1.8 (edit: F/2.8, not 1.8) 4-part mosaic, total 254x 2 min Ha - 135mm F/3.5 Total exposure is 12 hours 38 minutes. Mainly it's Ha exposure though, and i'm looking forward to capturing more OIII as well at a longer focal length - but for now i'm really happy with the result!
  6. From the album: Deep Sky Objects

    NGC6960 – Witch's Broom Nebula Really delighted with this one. We had a lovely evening where I could get some great subframes, it was stable and nice and clear for a change. This is a supernova remnant in the constellation of Cygnus. Its original host star exploded some 5000 - 8000 years ago. It is roughly 1,500 light year away from us.
  7. Had another go at my 2.8 h of data on this nebula from 2015 and 2016, trying to control the star field better. One reason was that I just invested 50 dollars in the Star Shrink plugin for PS (by Russell Croman). I have previously used "Make stars smaller" in Noels Actions for PS. I also did my best protecting the stars while stretching in many small rounds. This is quite a fight with the Veil nebulas that easily get buried in a snow storm of stars. I think I managed better than before and the Star Shrink is a good little plugin as there are some sliders that can be used to better control the shrinking (selecting for different star sizes, strength and sharpness), while Noels Actions is just controlled by the number of times the action script is run, and by finally using the slider on the layer. I have previously also used some of the manual methods (using the selection tool and minimize filter in PS). In any case, I still end up with neighboring stars being connected by a cord of light, giving an odd impression if you zoom into the stars. Maybe it is not a big problem for the overall impression of the image but it is rather annoying. Any great tips on shrinking stars without odd artifacts? It could be that I am just shrinking them too much and then small neighboring stars that were not completely separated in the data will inevitably show these cords connecting them. Here is the "big picture" and a crop on the star oddities (ES 5" apo at f/5.9 and Canon 60Da, 21 x 480s, ISO1600): By the way, I have no moral issues with shrinking stars since they are point objects that are blown out of proportions by our atmosphere, scopes, guiding and chips.
  8. Hi! My first post so I'm little nervous ;-) I'm still a beginner but I decided to show my work. Here are my photos taken in last 1,5 year with Nikon D7200, Sky Watcher 150/750 (Newton) telescope with Baader MPCC on HEQ5 SynScan mount with self-made bluetooth adapter and ASCOM jolo-focuser guided with 50/172 guider scope and QHY5LII Now I'm working on better post-processing and calibration of my photos... M51 20x300s ISO1600, 3x dark M97&M108 12x300s ISO1600, 3x dark NGC6960 20x300s ISO1600, 3x dark NGC7023 11x300s ISO800, 3x dark Leo Triplet 12x300s ISO800, 3x dark Best regards! Tomek
  9. I love this time of year but I've been hexed with bad imaging conditions and some equipment trouble so far this month. I was finally able to grab a few keepers and bring you one of my favorite DSO up there. NGC6960 The Witch's Broom. 17-3 minute lights,15 darks and 50 bias frames. Stacked in DSS and stretched a bit in PS. Final tweaking in LR. Hope the processing isn't too scary. Let me know what you think.
  10. Hi all, Just another update on my progress thus far... I had some good nights recently, with rather variable results, so wanted to share, and hope to receive some feedback on my musings as to the causes of the differences. First I went high up (1600 m) on a quite clear night, with also good seeing, and I was able to take this: Then, last week, I went less high (1000 m), good clear night, but with some more light pollution, but (IMHO) with better setup: The latter image was done doing drift alignment, AND PEC on my HEQ5 SynScan. The former only with drift alignment. I also tried the M31 on the second occasion, but it was much lower than the NGC6960 (which was close to zenith) and it has terrible traces and other anomalies: I had to dump a lot of subs... :-( So, as you might see, the stars in the second image are much better, but the light was better on the first image... I am obviously still also on a steep learning curve, so that might also have contributed... Question: how much of the quality of the stars in the second image do you think is due to the mount being better balanced pointing to zenith? If this is a significant amount, that would mean that for now I should limit myself to zenith objects, to obtain quality subs..... :-/ Second question: do you think making flats would help with the obvious lighting problems on the second image? Friday maybe I'm going out again, and will have another try at the NGC6960, or maybe its sister NGC6992... There's a full moon, though.... :-/ Thanks!! Gerhard.
  11. From the album: Deep Sky

    Taken with a SW ED80 and Trius SX26C over several nights in August 2015. LIGHTS: 48 x 300s. DARKS: 30; BIAS: 100; FLATS: 40 all at -20C. Post processing in MAXIM DL and Photoshop CC. Applied LR deconvolution in MAXIM DL .The slightly ethereal effect is a by-product of the Screen Mask Invert technique used in PS post processing.
  12. I recieved my new toy on Friday but didn't get time to set it up till Saturday, to my surprise it remained clear, so went to try it out. Everything went so well I polar aligned in no time using Sharpcap. I slewed over to Alkaid and focussing with the Bhatinov mask was a doddle with the very smooth 3" focusser. I use APT and CDC/Ascom to control everything from a laptop next to my mount, I used Goto++ & PlateSolving to move to my target NGC6960 (The Witch's Broom Nebula). PHD2 quickly calibrated and appeared to be guiding very well. I then set APT off capturing 300s subs with a dither after each one. I thought to myself if this is how it's going to be everytime with my new scope this pastime is going to be so easy from now on. I retired inside RDC'd from my other laptop to keep an eye on the progress and relaxed. After about an hour APT started it's automatic Meridian Flip process, that's when everything went pear-shaped, it failed to platesolve it's image and timed out, so I tried forcing it to flip and it just would not platesolve the 30s image it took. I then did a Goto++ on my target, the mount did a flip took the image and platesolved it first time then happily started taking 300s images again. It got to about 01.00 and I was getting tired so I stopped it capturing thinking I'd better go to bed, but then I noticed Cassiopeia had appeared from behind my house which meant M32 would be in view and I wondered what it would look like captured through the Esprit. I slewed round and looked at the sub then did the stupid thing of rotating the focusser to try to get it across the corners of the sensor to capture as much as possible, I took 4 subs, then a few darks and packed everything away. It wasn't until the next day when I took some Bias and Flat frames and tried to process it all that I realised by moving everything I had ruined the flats. We live and learn. Anyway I managed to just stack the 12 lights from before the flip and cropped it with no further processing until I get some more subs. I'm very please with my new scope.
  13. Hi My first serious go at a narrowband image taken over a few nights from my back garden in not-so-darkest North Staffs Ha: 30 x 300s OIII: 28 x 150s R: 22 x 30s G: 22 x 30s B: 22 x 30s (I also took a whole load of L lights but didn't use them in this versions - still feeling my way in to NB imaging) RGB lights used for star colours only. Calibration: Bias and flats, no darks (dithering) Ha used for Luminace and Red channel OIII used for Blue and Green channels Equipment list in sig
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