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Found 16 results

  1. Hi Guys, I thought I would share with you my first DSO taken with my new Orion 8" Ritchey Chretien F8 Telescope. The frame is made up of 12 x 4min shots, no light or dark frames, using my Sony A7Rii camera. The camera had the long exposure noise reduction switched on, which does help to reduce the total number of stars captured by the camera, as the Sony A7Rii does tend to overdo the number of stars captured. The telescope was mounted on my trusty skywatcher NEQ6 mount and the guiding was via PHD 'of course' via my skywatcher ED50 guide scope. The shots were taken from my back garden in Stowmarket, Suffolk where I believe I am a Bortie 4 location, so the skies are mostly dark, with just a little light pollution from the main town, no filters used. My normal telescope is a Skywatcher ED100 Pro Esprit F5.5, which is an incredibly sharp scope, but with a wide 550mm field of view, great for capturing the whole of Andromeda but a struggle with smaller images like the Iris Nebula. I will say the Orion RC scope did need to be collimated out of the box, which was a little disappointing, and it was not just a little out of collimation, it was a long way out, but with the use of a collimating tool, I soon had it dialled in. First impressions of the Orion Ritchey Chretien 8" Telescope are fair, not super impressed, as it is nowhere near as sharp as my ED100 Esprit, but then this is to be expected based on price and telescope type, however, the pictures it has produced are pretty good, if you downscale the full 42MP from the Sony A7Rii camera, as can be seen in this picture. I purchased this 8" Orion Ritchey Chretien OTA mainly for Planetary work, but as yet I have not had a chance to 'get onto' a planet, fingers crossed some clear nights will arrive soon, so I can try. I welcome comments, many thanks Jamie
  2. Clear skies over here both Saturday and Sunday night. I have already posted my pathetic attempt at NGC1333 from Saturday night. I can only blame the wine for that result (and post). Sunday night went better with new data on the Iris that I could add to my old from October, so now totally 39 x 8 min (= 5.2 hours). ES 5" ED apo, Canon 60Da with natural cooling (-2 °C in the air) on EQ8. SQM=21.1. I also got some new Packman data that I will have a look at now (nights are long over here). Then I will take a break from AP and the Scandinavian winter and head off to SE Asia and Australia for two months for marine biology work, so I aim for clear skies here again in February. All comments welcome!
  3. This Sunday got some clear skies and decided to spend the time before the Moon in playing with widefields. Tried the Iris and the Trunk - both interesting areas and stayed with my favorite Autumn object. There are no much images in this scale, so you may find it interesting. Total 2h 5min, EOS 550D, ISO 1600, f/4, LXD-75 APT, P​I​
  4. I posted a version of this Iris data about a month ago and got a lot of responses (than you all!) including some critical comments regarding the brown/yellow dust around the blue nebula looking more like gas than dust. I could see the point and I have now spend this cloudy Sunday reprocessing it completely. I think it is improved (gas -> dust) but then I spend so much time starring at my different versions (the one posted here is saved version 38) that I probably lost any objectivity, so all comments are most welcome. Totally 39 x 8 min (= 5.2 hours - presently clouds prevent any chance of getting more ). ES 5" ED apo, Canon 60Da with natural cooling (-2 °C in the air) on EQ8. SQM=21.1. Home obsy in Värmland, Sweden 60°N. Here is the old tread:
  5. Hello all! The weekend that just passed we went to my girlfriend's parents. The skies in that rural area are pretty much as good as you can get. I don't have an SQM reader, but Clear Outside estimates 21.91. I didn't take the EQ6R with me, I still consider it a big lump of iron, and the AZ-EQ5 should be on its way back this week as a Stellar mount. So I used the EQ5 which was left in the car for a while. While the tracking/guiding on the RA axis is quite good, the DEC control jumps a lot after multiple consecutive guiding commands, I blame the "enhanced" handset. So with all the drawbacks, I tried to do align the mount as good as I could and I put the 72ED with the ASI1600 on it and a finder-guider. Perhaps also focus could have been done a bit better, FWHM in the subs was 3.x. Below is a quick process from last night, no deconvolution yet and a purple area at the bottom that I have to fix. 58x120s lum, 30x120s each RGB. Last version:
  6. I've just got back from a mini-break down in Cornwall. The skies were nice and dark, so I took the 'scope with me. To my surprise, I was treated to a couple of clear nights! :-o At SGL9, the plan was to gather some data on the Iris nebula with the goal of collaborating with Rob (Uranium235). Unfortunately, I didn't get the clear sky at SGL but now I have some data to contribute we'll surely have a go at combining the datasets soon... Not sure how well the refractor + reflector subs will combine together, but will be interesting finding out. In the meantime, here's the stack of my side of the data. Quite happy to capture some of the fainter dust (albeit a bit noisy still). I feel this would have been impossible to extract from my light-polluted skies at home! 38x600s + flats, ISO800, Canon 450D Skywatcher 150PDS Vixen GP + finderguider & SPC900
  7. Hi Guys/Girls I had a chance to get out in the garden last evening, had a go at capturing NGC 7023 - Iris Nebula, only managed to get 12 good shots, 240sec x 12, combined in Photoshop with Mean Stacking. The dew was super heavy and currently I do not have any dew heaters (next purchase) so lost the battle after around 2 hours. One interesting point is I captured these shots with the long exposure noise reduction switched on with the Sony A7Rii, so each shot took 8 mins to take and save, but as a result the noise levels were next to zero at 800 ISO, and at the end of the day the noise is always our enemy. I need to try a real pro level 'cooled' astro camera just to see how much better it could be, as the Sony A7Rii is just stellar ! I am very happy with the final shot, taken with my Skywatcher 100 ED Pro Esprit Scope on my NEQ6 mount, Skywatcher ED50 Guide Scope and Altair Astro ASI130mm camera, PHD2 of course. The sky was nice and clear with low light pollution, as around 5 miles from major town. I do not take darks or flats or use Deep Sky Stacker, and I do not use filters, plus the camera has not been modified, so I am always delighted with the results I get from my set-up, as I have a deep level of respect for the hard work that most Astrophotographers go through to get the incredible images that we see here in Stargazers. I have read that some people believe that the Sony Alpha cameras have a tendency to 'eat the stars' and not show everything captured, to be honest, I always used a Canon 60Da for many years for my astrophotography, until one day I though, what if my Sony A7Rii could be used, the first time I did this I released that it was time to sell the Canon 60Da, the 'Remote' (free) Sony software is almost as good as BackYardEOS, but the cameras are a decade apart in performance, the noise levels on the Sony are at least 4 maybe even 5 stops better than the Canon, that is the Sony A7Rii at 3200 iso equal to the Canon 60Da at 200 iso, so at 800 iso it is just so impressive. As you can see from the picture only 12 frames, stacked in Photoshop (Mean). Open to comments and welcome a discussion/debate, thanks Jamie
  8. Here's a little run at the Iris Nebula in Hydrogen Alpha... Now it isn't much to look at, but it's all i've managed so far. 127mm triplet, Atik 428Ex and a AZEQ6 1h15m total exposure. 5 x 15min in Ha This thing is really difficult in Ha... i'll have to go deeper next time.
  9. 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
  10. Hello, One Saturday ago I shot some frames on Iris nebula. There should be 21x300s frames at ISO1600 taken with an unmodded Canon 550D, Tair 300s at F5.6 on an AZ-EQ5 guided with dithering. Enough darks and bias, no flats yet. I could take the flats later for vigneting removal, but I could spare some margins. The result of what I processed until now is here, I could probably lower a little the noise, but I'm not good at processing. Yet I wonder if anyone would mind to show me what they can pull out of my data. The stack is made with DSS, unbalanced and converted with GIMP to 16 bit integer tiff from the original autosave file. jpg: https://drive.google.com/open?id=0ByhJ_xuQxcnjMlhTT0sxMk5VY3M tiff processed: https://drive.google.com/open?id=0ByhJ_xuQxcnjM1RJTENwU2l2QVE tiff unprocessed: https://drive.google.com/open?id=0ByhJ_xuQxcnjcjZ0bzNON1ZDcFE Thank you, Alex
  11. alan4908

    Iris Nebula

    From the album: Deep Sky III

    An LRGB image of the Iris Nebula, representing about 11 hours integration time and taken with my Esprit 150. The Iris is a reflection nebula in the constellation Cepheus. The light from the very bright central star is scattered by the surrounding dust giving it a distinctive blue colour. Although not designated as an emission nebula, you can also see reddish regions close to the central star which indicate the presence of ionized hydrogen. Also present is an open star cluster, which can be best seen through the triangular clearing of dust to the left of the bright central star.
  12. Here's my latest, taken over a couple of nights this summer: 17x600s L 1x1, 17x180s R,G and B 2x2 binned (don't like the 2x2 binning, no binning for me from now on). Flats, darks and bias, equipment as per sig, Pixinsight. The Iris Nebula (NGC7023) in Cepheus is a dark nebula and reflection nebula. The dark cloud of inert dust and gas obscuring the background stars is illuminated in the centre by a mag-7 star, reflecting pale blue starlight. It is 1,300 light-years away and 6 light-years across. Hope you enjoy !
  13. Last night was a bit of a miracle, there was more clear sky than predicted! I set everything up at dusk expecting to be able to do nothing more than practice polar alignment, but I actually managed to get some imaging in as well! Admittedly I had to spend the first half of the night fighting SGPro in order to convince it to actually let the guider settle before opening the shutter again. The first hour of subs needed to be thrown away as they all had lines where PHD was trying to bring the guidestar into the right place after dithering, but SGPro has waltzed on ahead. It turns out that the integration of Sequence and Equipment Profile in SGPro is unclear and byzantine. I managed to capture some of the dark dust surrounding the brighter nebula which I am pleased about. There is still a bit of a gradient from top to bottom, but I could not decide if it was more dust, so I decided to leave it in. The centre of the nebula is completely blown out unfortunately, I tried to take some shorter exposures, but even at 60 seconds, the core was blown out and I was getting no nebulosity at all. Lights: 21 x 300s @ ISO400 Darks: 112 x 300s Bias: 492 Flats: 54 x 1/8s C4 - Iris Nebula by frugal10191, on Flickr Mount: Skywatcher AZ-EQ6 GT Imaging Telescope: Skywatcher ED80 DS-Pro with 0.85x FF/FR Imaging Camera: Canon 60D (Unmodified) Guiding Telescope: Skywatcher ST-80 Guiding Camera: Starlight Xpress Lodestar X2 Software: Sequence Generator Pro, PHD2, PixInsight I also tried to image the Elephants Trunk as some people have had success with unmodified DSLRs, but the 10x300s subs I managed before the clouds rolled in show no signs of nebulosity when stacked ;(
  14. I posted the first version of this Iris Nebula data at the end of November (data from two nights in October and November), and today I took another look at it and thought I could see a bit more information, star colour and dust in there, and yes there were more to be found. Here are first the November version, then today's reprocessing, and for once my image contains enough detail that I can also post a zoom of the central feature. Totally 39 x 8 min (= 5.2 hours). ES 5" ED apo, Canon 60Da with natural cooling (-2 °C in the air) on EQ8. SQM=21.1. Home obsy in Värmland, Sweden 60°N. Maybe I overdid it so all comments and suggestions are welcome.
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