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Found 22 results

  1. Hi, During the 3 clear nights in a row, I had last week, I could not resist giving the Horsehead Nebula a go, using my Vixen VC200L. Whilst imaging with my Canon 450D via APT, I could not make out the Horse's head whatsoever on my laptop screen, but I knew I was on target, because I could see NGC2023, at the bottom of my screen. Anyway I was pleasantly suprised with this result after processing through APP and tweaking in GIMP. Not the total failure I was expecting. Image Info:- Vixen VC200L Telescope Canon 450D camera unmodified ISO 1600 All I could do before fog ended the night:- x20 120 sec Lights, x20 100 sec Lights, x10 80 sec Lights, x10 40 sec Lights x21 Darks, x40 Bias and x40 Flats Processed in APP Regards, Steve
  2. After being sick for what feels like an eternity, followed by two weeks of clouds and wind, i simply could not just let this night go as it was said to be yet another week or two with clouds on the way. With my main scope not quite ready for use yet, i quickly hooked up the QHY5L-II-M to a canon 50mm lens, attached a 7nm Ha filter, and started looking for a decent target. I didn't need to look long before i saw Orion, and then it was set! As the moon is currently 78% lit i must admit i was a bit worried, but i think the end result turned out OK, especially considering the relatively little data of just about 1 hour. Exposure is 13x 300s (and 35x 30s for the core of M42) with the QHY5L-II at gain 12. The lens is a Canon 50mm F/1.4@F/2.8 Darks applied to 300s exposures, but no flats or offset. Stacked in DSS, processed in PS and cropped to 16*9 size.
  3. I've wanted to image the Horsehead Nebula from my obsey for quite a time but nearby trees have blocked my view. Determined that I would accomplish this in 2018, after a bit of tree pruning in late 2017, I managed to get a theoretical c1 hour per night visibility, albeit at quite a low elevation of c25 degrees. Not ideal, but better than nothing. Since I wasn't quite sure how much of an hour I'd get due to weather and moonlight conditions, I decided to reduce my Ha subs from my normal 1800s to 600s. Since some of the stars in my FoV are quite bright, I also cut my LRGB sub duration from 600s to 300s. The target has once again disappeared from my view for another year, however, I did manage to capture a usable c6 hours of subs and it only took me three months The image is an LRGB with a Ha blend into the Lum and Red channels. Alan LIGHTS: L:14, R:11, G:8, B:9 x 300s, Ha:14 x 600s, DARKS:30, BIAS:100, FLATS:40 all at -20C.
  4. Hello all, I'm starting a new thread for this since the hydrogen data is rather old and it has been reprocessed since I posted a while ago. Now I finished the acquisition of O[III] too. Or sort of, I planned more, but clear nights were so rare that I decided to process what I had. The image was done in "3 pass" data over the area. That means that I acquired 3 sets of images covering the same area and combined in the end. First 2 in hydrogen, the last in oxygen. First set consisted of 3 panels in portrait mode for the top area and then I wanted to extend them to the bottom so I shot another 2 panels in landscape mode. I knew that I could get a higher SNR so I shot 4 more panels in landscape mode. Each panel consists of 30-31 subs, each sub 300s. Then I started the acquisition of O[III] which needed light pollution and moonlight conditions than the Ha required. Top panels contain 30 subs, but the bottom ones, only 20-22. Each 300s. Luckily there's not much oxygen in that area so I could get away with less subs. I also took some 10s-30s frames for M42's core. For the framing, I created a quick mosaic of the same area. For the final alignment I shot an image somewhere close to the center of this area. I can't remember if the initial register was done in APP or Registar - for the first pass, but for the next ones it was done in Registar. I removed the gradient manually in each stack with APP and then I created the mosaics for each pass same with APP. The 2 Ha passes I then blended manually 50%-50%. For the processing, I tried to stretch both Ha and O[III] to the same levels and I combined them manually in some 60-40/70-30 ratio for a layer which I used as lum. The colours were Ha - reddish, O[III] - cyan-blue. I spent a lot of time trying to control the big stars, the O[III] filter has poor coatings and, together with the ASI1600s non AR coated sensor, I had much brighter reflections than with the Ha filter. And I tried to raise the oxygen levels selectively around the flame and NGC2023, but the flame is really dim in O[III]. Don't know what other details in the story I forgot, this project drained me a lot of energy. Camera was ASI1600MMC, cooled to -15C for the first pass and to -25C for the ones following. Gain 139. Canon 300 F4 L IS lens with a lot of aberrations towards the edges. AZ-EQ5 mount guided with a 200mm lens and an ASI120MM, with varying seeing. 1.5-2.5" RMS guiding error usually. APT for capture, PHD2 for guiding, Registar for each night initial alignment. DSS, APP, Registar, StarTools, GIMP for processing. I started shooting early in October and I wanted much more, but Orion already becomes less and less visible from where I image and hides beyond the house. Ah, yes, I image from a yellow-pink light polluted area. Thanks for reading, thanks for looking! Comments and suggestions are appreciated. Links to original image and acquisition details: https://drive.google.com/open?id=17tr8lqagQAJg8maojtHZPbM-f67gSBTv https://drive.google.com/open?id=12gjGEgeR7FxR1Tow0e64JczeeUIqKojK https://www.astrobin.com/330284/ Alex
  5. alan4908

    Horsehead Nebula

    From the album: Deep Sky III

    An LRGB image with an Ha blend into the Lum and Red channels. Taking into account this was captured in non-ideal conditions (c25 degree elevation) due to tree obstructions and about 1hour visibility per night, I was quite impressed by the amount of detail which the narrowband subs generated.I normally take 30mins Ha subs but decided to reduce these to 10mins since I was uncertain how many usable subs I'd get due to the combination of the UK weather and the relatively short imaging window per night. In the end, it took 3 months to gather the data.....it is at times like this when I'm thankful for an automated imaging setup ! LIGHTS: L:14, R:11, G:8, B:9 x 300s, Ha:14 x 600s, DARKS:30, BIAS:100, FLATS:40 all at -20C.
  6. Hello all! I acquired yesterday the third hydrogen panel of this area. I might add 2 more below, in landscape. We shall see how the weather plays. 2.5h each panel in 300s subs at unity gain. And some 30s exposures for the core. Camera is ASI1600MMC on the Canon 300 F4 L lens, cooled to -15C. And first successful try with the Astro Pixel Processor, though, the stacks were made with DSS. I just purchased APP and I didn't restack them. I'm not sure if I should add more hydrogen data or move to oxygen and then LRGB. I still have time to decide until Feb-March. More details: http://www.astrobin.com/317154/ Comments welcomed. Clear skies, Alex
  7. From the album: Wide-field (not barn-door)

    Orion Belt and Sword - M42 (Great Orion nebula), M43 (De Mairan nebula), NGC1977 (Running man nebula), NGC2024 (Flame nebula), IC434 (Horse head nebula) Capture: 24 lights x 60s x 2500iso, 8 darks, Olympus E-PM1 with Pentacon 135mm/2.8 (short) @4 on Omegon EQ-300 tracking RA, neodymium filter Processing: Regim 3.3, Fotoxx 12.01, Gimp 2.8 Date: 2016-09-08 Place: Deep country 26km from Limoges, France

    © Fabien COUTANT

  8. While waiting for the ASI1600MMC, I'm still playing with the ASI120MM. As I don't have a clear view to the South, I can only see Orion less than 2 hours/day and I can use the mount only in AZ mode. All in all, here is the result of ~1000 7nm Ha exposures of 15s, 70/100 gain captured with FireCapture over 3 nights. Lens: CZ 135 F/3.5 wide open. I could use the smaller stars taken with the 300mm lens, but it's not a great result so I'm not sure I'll bother. Clear skies, Alex
  9. Hello all This is my first attempt at the horse head nebula with no guiding and only a Canon 550d taken last night! http://www.astrobin.com/full/274255/B/ I have only done a little processing on it but I'm pleased! Any thoughts or questions welcome. Kind Regards Gerry
  10. Yet another Horsehead (sorry). Imaged on the 20th using my ED120 and Modded 1200d with UHC-E Astronomik filter - 27 subs of 300 secs at 800 iso. Stacked with Bias and flats. Dithered so darks not added. Tried adding darks but it got noisey. Comments and suggestions welcomed as usual and thanks for looking. Peter
  11. MarsG76

    IC434 Nov2017 Crop

    From the album: Deep Sky Imaging

    This is a cropped image of the other Horsehead image which I imaged through the NexStar 8SE on the CGEM mount in the native 2032mm focal length and recorded by my modded Canon 40D DSLR. Total data amount was 75 used in this image... HII: 29 x 15 minute ISO1600 RGB: 13 x 10 minute and 25 x 5 minute ISO800 UV: 8 x 20 minute ISO3200 So total time spent on integration was 850 minutes

    © Mariusz Goralski

  12. MarsG76

    IC434 Nov2017

    From the album: Deep Sky Imaging

    This has been imaged through the NexStar 8SE on the CGEM mount. This was imaged in the native 2032mm focal length (F10) through a Baader UV/IR Cut and Halpha 7nm filters and recorded by my modded Canon 40D DSLR. I experimented with trying to capture some UV data through the Astrodon UV filter but it was a failure on the horsehead... I talked about it in another post, but I think that stacking the UV data into the rest pulled the stars back to white from the redness caused by the HAlpha data. I used PHD 2.6.4 to Autoguide for the first time and I have to say that I like PHD 2 a lot, highly recommended... it is very good, my guiding accuracy (according to PHD2) was between 0.5" and 0.8" arc sec... I found it easy to get to grips with. Total data amount was 81 subs, 75 used in this image... HII: 29 x 15 minute ISO1600 RGB: 13 x 10 minute and 25 x 5 minute ISO800 UV: 8 x 20 minute ISO3200 So total time spent on integration was 850 minutes

    © Mariusz Goralski

  13. Ok, now we´re talking Another batch of 36x300 secs frames out of the oven, this was captured in two consecutive nights with little moon impact so better contrast then my previous M42 image, also the callibration seem to be spot on as I can't detect any gradients or poorly calibrated residual glows, happy happy Good to know there's still ample room for improvement as this is just over 3 hours so will add at least the double integration time, let's see what it brings. Setup is the same: -SW ED80 with Altair Astro 0.8X reducer (f/6) -QHY163M -Baader 7 nm filter -EQ6 mount -ASI 120MM with 50mm finger for guiding Stack of 36x300 sec. at Gain20 Ofrfset100 USB traffic set to 5 (will lower to 1 on future captures to see if the amp glow is further reduced) Here on Flickr: https://www.flickr.c...eposted-public/ Hope you guys enjoy, Luís
  14. Field around the Horsehead Nebula bordering up to the edge of M42. I wanted to try to bring out some dust below the Ha region but ran out of time to deal better with the crazier stars. First time I've processed the Horsehead without any Ha data added (will have a go now I've done the LRGB only version for this competition). L 42x5min, R 16x5min, G 16x5min, B 25x5min, taken in December 2017 and January/February 2018 with a Takahashi E-130D on Avalon Linear mount with Moravian G3-16200 mono CCD. Processed in Pixinisght. Hope you enjoy! Paul
  15. It turns out I can not acquire more data until this challenge ends. I present you therefore what I have until now. It's a 5 panels mosaic in Hydrogen alpha. 3 panels in portrait mode, at the top. And 2 in landscape mode, at the bottom. Each panel is made by 30-31 subs of 300s and for the Orion nebula core I have a few 15s subs. All subs are taken with the ZWO ASI 1600 MMC, cooled to -15C, and 139gain. The lens is a Canon 300 F4 L with a lot of distortions caused by the IS element. Compared to the images I was taking on other targets until Orion rose enough, the focus was good since the beginning and remained ok during the nights. Mount: AZ-EQ5. Guiding with a 200mm lens. Software used: APT and PHD for acquisition; DSS, APP, Registar, StarTools and GIMP for processing. I plan to acquire 4 more Ha panels in landscape mode to cover the same area to increase the SNR and then to move to O3 and LRGB. A lot of work this winter. Link with wip: http://www.astrobin.com/317154/C/ Thanks and clear skies, Alex
  16. Evening all - decided to finally publish this been returning to on and off for a while and decided not much more i can do with it. Widefield RGB stars are a struggle still for me, wont be getting any HA for a while which i could have used to better control so decided it's time to jump in as is! It comprises of some relatively short LRGB taken on a wide-field Rokinon 135 - I then created a composite luminance layer from scratch featuring the Rokinon and FSQ data for each object. Totalling about 34 hours of exposure. I blended the composite lum with the Rokinon RGB and then reinforced this further with some colour from the original stand-alone images. Hope you enjoy. Paddy
  17. This is the Ha (15x 30 mins with the Chroma 3nm) to go with the LRGB data I used here: I haven't managed to satisfactorily incorporate it yet, I think because it's a lot stronger than the RGB and it reddens the image too much (and overwhelms a lot of the brown dust which I want to preserve). Ideally I'd increase the amount of LRGB data substantially to help with this but it's too late for that now this year; guess I'll have to work on my processing skills a bit more. Will also try to rework the stars in (L)RGB to tame them somewhat. Paul
  18. Yesterday evening was clear and I just bought a Canon 300 F4 L sh a week ago. Didn't want to take out all the heavy mount, power supplies, camera, etc. and it would even have been impossible perhaps to set it up in time. So I took the EQ5 with RA tracking (powered from an USB power bank), the lens and the Canon 550D. Went somewhere outside, the galaxy was just visible, but much, much better than city lights. Had a look before at Venus and at Orion's nebula with the 100 F5 achro then I put the camera. I also recently bought a polar scope for the EQ5 and it was the first time when I aligned a/the mount using the polar scope. The circles were much darker than I would have expected. I tested then the tracking with 30s exposures and it seemed to track without trailings, but I was a little afraid so I set the exposures to 20s. I don't have an intervalometer so I couldn't even try longer than 30s with just the camera. I made a manual trigger though so I could fire it up with the camera set on continuous shooting. During the night tracking seemed to stay on spot, I had to refocus once. It was pretty cold, about 5C maybe and I stayed inside the car. So I took more than 200 exposures of 20s at ISO1600 and aperture wide open at F/4. I used about 220 of them. I also took about 60 5s exposures to use for the stars. I'm pretty impressed by the lens' resolution, though I suspect that stopping it down it could help even more. For comparison, I'll attach another try from early October, but taken with 2 Tair 3s lenses stopped down at F/5.6, put on a Canon 550D and a Canon 450D. If I remember well, I exposed then almost half an hour before the batteries went flat. So the total light acquired yesterday was more than double. But the sky was not as good. I also added about 2 hours of noisy Ha to the image, taken from the city with the ASI 1600 MMC also with the Tair 3s and Optolong 7nm Ha filter. I don't think I can make it look much better. Enough writing so here are the images. The colour ones with many spikes are the old ones taken with the Tair lenses. Clear skies, Alex
  19. From the album: Stevebb.com

    IC434 - Bleeding heart and Horse Head Nebulas taken using a Skywatcher Equinox ED120 on an NEQ6 Pro mount and imaged using Backyard EOS and a modified Canon 450D DSLR.

    © steve@stevebb.com

  20. Another image from Southern France, around 5 hours of data. I left out the Ha data as this looks more natural.
  21. Hi all, so had a very (surprisingly - given the recent weather) clear night last night so took the following of a good 'ol favourite IC 434 - Horses Head. Even though the image came out ok I think the amount of noise demonstrates that I'm hitting the limit of what is possible with a DSLR. Anyway, I'd like to hear your thoughts as always and open to all criticism as ever 10x900s @ISO 400 (few more subs were binned due to aeroplanes, etc) 5 darks, 10 bias, 10 flats. Stacked in DSS and processed (as best I could get out of it) in PS CS5 Cheers all, clear skies Will
  22. From the album: Alt-Az / NoEQ DSO challenge

    Try 2 at all nebulas around alnitak, from heavy light-polluted skies oh home around Paris but with UHC filter. Much better than try 1, thanks to number of subs, but still difficult to come, I suppose because of limited sensor depth. (or is it LP?). However some color is missing, had to use manual BV calibration in Regim to get something barely acceptable. Capture: 101 good of 123 lights x 25s x 2500iso, 30 NG darks, Olympus E-PM1 with Skywatcher 130PDS on Celestron Nexstar SLT, Skywatcher ComaCorr and TS-UHC filter. Processing: Regim, Fotoxx Date: 2017-01-21 Place: suburbs 10km from Paris, France.

    © Fabien COUTANT

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