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Found 204 results

  1. bottletopburly

    Bubble Nebula

    Finally making progress with guiding and dithering and the autofocuser , sw200pds , modded canon 1000D , Eq6 belt mod -7x300sec 25 flats -25x Bias as darks
  2. Star101

    Crab Nebula M1

    M1 Crab Nebula taken 7 Oct 2018 from my garden. ZWO ASI 183mm Pro C11 on Mesu 200 12 x 120s subs for each RGB. Processed in Pixinsight.
  3. Maxrayne

    NGC 7000 220mm-1.jpg

    From the album: Nebulae

    © Graeme Healey Photography

  4. Maxrayne

    NGC 2024-1.jpg

    From the album: Nebulae

    © Graeme Healey Photography

  5. Maxrayne

    M42 400mm Ap Mask-1-2.jpg

    From the album: Nebulae

    © Graeme Healey Photography

  6. Greetings everyone. Few months ago I wrote a post about a small refractor to mount on a Star Adventurer, but I'm now considering fast tele lens like the Nikon 80-200 f2.8. My question is: what is the best tele lens to get pictures of Andromeda galaxy, Orion, Soul, Hearth nebula and stuff like these? If I'd pick a 70-200 f2.8 lens, can I plug a teleconverter 2x to get better crop without losing details? I've attached a picture taken with my Nikon D3300 and 18-105 kit lens, as you can see it's quite small (forget about the quality, it was also quite foggy back then). Thanks in advance.
  7. Hi all, As I'm slowly going through my data from July, this time I processed the RGB data of the Swan Nebula. This Nebula can really use a bit more magnification, so now I'm thinking of revisiting it with my SCT next season. At this focal length it's too small, but 1280mm or 2032mm through the 8" SCT should make it more impressive. I still have the narrowband data to process so hopefully the SHO image will turn out more dynamic. The total exposure time on this image is only 55 minutes, 20x60 second, 12x150 second and only 1 of 300 second subs, all at ISO1600. Taken with a modded 40D through a 80mm refractor at 500mm FL. Clear Skies, MG.
  8. 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
  9. The Cat's Paw Nebula ( NGC 6334 ) in Scorpius updated ( slight tweak to colour balance, a little brighter and tad more contrast ) ( please click / tap on image to see larger and sharper - a full size image can be seen here ) ...... original: ( please click / tap on image to see larger and sharper - a full size image can be seen here ) ……………………... Also known as the Bear Claw Nebula, NGC 6334 is an emission nebula near the scorpion's tail in the Scorpius constellation. Image details: Image centre ...... RA: 17 20 08.185 Dec: -35 52 30.91 Field of view ..... 57' 37.8" x 38' 51.8" Rotation .......... 0.00 deg ( North is up ) Resolution ........ 0.586 arcsec/px Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ). Corrector: ASA 2" Coma Corrector Quattro 1.175x. Effective Focal Length / Aperture : 1470mm f4.7 Mount: Skywatcher EQ8 Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2 Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels) Location: Blue Mountains, Australia Moderate light pollution ( pale green zone on darksitefinder.com map ) Capture ( July 2018 ) 6 sets of sub-images with exposure duration for each set doubling ( 4s to 240s ) all at ISO 250. 168 x 4 min frames plus ~10 frames each for the shorter exposures Processing: Calibration: bias, dark and flat Integration in 8 sets HDR combination Pixinsight July 2018
  10. Messy I know, but with what I have to work with atm, I'm really happy so far. Hoping to add more data NGC 7000 North American Nebula Exif: Canon 550D 55mm (cropped) @ f / 4 3162 seconds (542 x 6 seconds) ISO 6400 Taken over 3 nights under Bortle 5/6 No darks / offsets
  11. Rhushikesh-Canisminor

    Finally Veil Nebula!

    Finally managed to observe the Veil nebula on last Saturday! I remember spending too many hours searching for it during my observations. The milky way band in the morning came up really nice ,almost a continuous band from scorpious to Cassiopeia (managed to see that too!). Thinking about giving veil a last try, we pointed our skywatcher 8 inch dobsonian scope with 32mm plossl eyepiece and lumicon UHC filter and BAM! It was right there, bright enough to show it for first timers too! Looked like an arc or smoke chain coming out of matchstick. All The reports say that Veil nebula is an easy object, but I have had hard time seeing it all this time, while easily observing Flame nebula and Horsehead nebula through smaller telescopes. Maybe it's the real dark skies...or just some plain luck! Clear skies!
  12. Carina Nebula with the bright unstable star Eta Carinae in the centre of the image. edit ( 27 March ): Tweak to shadow levels to bring out more detail and also a slight reduction in the brightness of the highlights. A much larger version ( 4562 x 3072 6062 x 4082) is available on my Flickr page. previous version: Carinae Nebula ( NGC 3372 ) ( please click / tap on image to see larger and sharper ) From Wikipedia ... "Eta Carinae is a highly luminous hypergiant star. Estimates of its mass range from 100 to 150 times the mass of the Sun, and its luminosity is about four million times that of the Sun." This HDR image is constructed from 12 sets of exposures ranging from 1/8 sec ( to capture the bright centre of Eta Carinae ) through to 240 seconds. Total exposure time around 13 hours 17-19 March 2018 Image details: Objects in image: Hypergiant, Eta Carinae ( HD 93308 ) in the centre of the Homunculus Nebula Carina Nebula ( NGC 3372 ) Keyhole Nebula Open Star Clusters: - Trumpler 14, 15, 16 - Collinder 232 Field of view ..... 59' 18.2" x 39' 56.0" Image centre ...... RA: 10 45 01.762 Dec: -59 40 52.87 Orientation: North is up Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ). Corrector: ASA 2" Coma Corrector Quattro 1.175x. Effective Focal Length / Aperture : 1470mm f4.7 Mount: Skywatcher EQ8 Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2 Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels) Location: Blue Mountains, Australia Moderate light pollution ( pale green zone on darksitefinder.com map ) Capture ( 17, 18 & 19 March 2018 ): 12 sets of sub-images with exposure duration for each set doubling ( 1/8s to 240s ) all at ISO250. ( 181 x 240sec + 10 to 20 each for the other durations ) Processing: Calibration: master bias, master flat and master dark Integration in 12 sets HDR combination Pixinsight March 2018
  13. Hi, I was asked on a Swedish forum to put an "Astronomical Dictionary" on my homepage. I have made a test page in an easy form. Astronomical related words linked to wikipedia. It aims to the beginners in astronomy so it should not be too complicated words. http://astrofriend.eu/astronomy/astronomical-dictionary/astronomical-dictionary.html Let me know if it's useful and and I shall add more words. /Lars
  14. Open star clusters Trumpler 14 & 16 and Collinder 232 with the Carina Nebula a very colourful backdrop Eta Carinae and star clusters Trumpler 14 & 16 and Collinder 232 ( please click / tap on image to see larger ( 1632 x 1632 ) and sharper image ) The stand out member of Trumpler 16 is the unstable hypergiant Eta Carina ( just to the left of the Keyhole Nebula ). A larger ( 3264 x 3264 ) version of this image can be found on my Flickr page. Capture and processing details can be found in this post.
  15. StuartJPP

    2013-05-05 - M16 - Eagle Nebula

    From the album: Deep Sky Objects

    Modified Canon 1100D with Canon 500mm f/4 L IS lens @ ISO1600. AstroTrac TT320 Mount. 25x 60 second lights 20x Darks 20x Flats 20x Bias Stacked in DSS and processed in PS. Taken on holiday in Fuerteventura.
  16. Bright Nebula NGC 6188 and open cluster NGC 6193 in Ara Magnitude +5.19, RA 16h 41m 42s, Dec -48deg 48' 46" Approx. 3800 light years away Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount (on concrete pier) Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. UHC-S - 32 x 180 sec ISO800 (14bit NEF, Long Exp. NR on). Pixinsight and photoshop 7 July 15 (processed 29 August 15) Other images: photo.net/photos/MikeODay 500px.com/mikeoday
  17. Reprocessed to try to better balance the colours ... (previous version: http://stargazerslounge.com/topic/239687-eta-carinae-nebula/ )
  18. Darth Takahashi

    NGC7000 - North American Nebula

    Here is the North American Nebula in the Hubble pallet and HA. I'm still a relative novice to the Hubble pallet adjustment and didn't want to overcook it? Most probably it can be pushed a little further? The image was capture using the trusty ST10 and the BabyQ FSQ85 over the course of this month. I have been battling with the weather to complete this before my holidays start tomorrow!!! 12x 800sec HA 17x 600sec OIII (2x2binned) 15x 600sec SII (2x2binned) I binned the OIII and SII since these are very weak in the nebula and don't contribute much in the way of detail. The HA data has been used as the GREEN channel and also a Luminance channel for the final image. The HA data is a little wider since I have had some small alignment issues between sessions, still setting up and tearing down my kit each night / session This is the alternative colour schema, I suppose that there is no wrong or right colour schema its just down to your personal preference? Which one do you like?
  19. A new target for me - the Running Chicken Nebula sits about halfway between the Southern Cross and the Eta Carina Nebula. IC2948 Running Chicken Nebula in Centaurus ( bright star is Lambda Cenauri) (RA 11h 39.6m - Dec -63deg 37.2'). Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT (on Pier) Orion auto guider - PHD2 (RA only - Dec ungiuded). Baader MPCC Mark 3 Coma Corrector, UHC-S (Nebula) filter, Nikon D5300 (unmodified), Long Exp Noise Reduction on, 14bit NEF, 13 x 300 sec ISO 200. PixInsight & Photoshop 28 March 15
  20. CKemu

    Dumbbell Nebula

    From the album: Astro Collection

    Love this little nebula, always a joy to look at and always a frustration to photograph as it never seems to go well, with either gear failure or weather getting in the way every time I try!
  21. Observations of the Sculptor Galaxy ( NGC 253 ) by William and John Herschel ......... Part 2. Observations of "Caroline's Galaxy" by Sir John Herschel, 1830's Sir John Herschel, the only child of Mary Baldwin and Sir William Herschel, was born in 1792 when his father was in middle age and already famous as one of world's leading astronomers. Having excelled in school, and no doubt inspired by his famous elders, John Herschel decided upon a career as a 'man of science' and set out to pursue a wide range of interests; with one particular focus being a continuation of the study of the heavens commenced by his father and aunt, Caroline Herschel. In 1820, with the assistance of his father, John Herschel supervised the construction of a new telescope at Slough in England. As described in the extract below ( from a paper presented to the Royal Society in 1826, titled "Account of some observations made with a 20-feet reflecting telescope ... " ), the telescope had a polished metal mirror with clear aperture of 18 inches, focal length of 20 feet and was modelled on the same design created by his father. It is this telescope, in the 1820’s and early 30’s, following the death of his father and the return of his aunt Caroline to Hanover, that John Herschel used to 'sweep' the night sky and extend the catalogue of nebulae and clusters of stars that was published by his father ( see W. Herschel's Catalogue of One Thousand new Nebulae and Clusters of Stars ). On the 1st of July 1833, having complied sufficient observations, John Herschel presented to the Royal Society an updated list of the positions and descriptions of the Nebulae and Clusters of Stars that he had thus far observed. As noted in the introduction to the paper published in the Philosophical Transactions, he had planned to wait before publishing until he had complied a fully comprehensive general catalogue of objects visible from the south of England. However, due to his expectation of “several more more years additional work” needed to complete the task and his assessment that he now was in a position to address, at least in part, the then current “... want of an extensive list of nebulae arranged in order of right ascension ...”, he elected to present his list, “ ... simply stating the individual results of such observations as I have hitherto made ... “. It was not until October 16, 1863, some thirty years later, that Sir John would deliver to the Royal Society his General Catalogue of Nebulae and Clusters of Stars. As well as introducing many objects that had not previously been recorded, Sir John’s list of 1833 included a re-examination of, and in some cases a small correction to, the positions of many of the deep sky objects observed by his father and noted down by his aunt. One of these re-visited objects was, unsurprisingly, the large and bright nebula discovered by Caroline Herschel in 1783 and recorded in Sir Williams’s catalogue as V.1 / CH 10 ( object number one, of class five ( very large nebulae ) / Caroline Herschel #10 ). In total, John Herschel records around 2500 observations of nebulae and clusters of stars in his 1833 paper; with observation #61 being V.1, the “ Sculptor Galaxy “ . The measured position of V.1is given in RA and the angle from the north celestial pole ( all reduced to epoch 1830.0 ). The description can be interpreted by reference to the legend in the paper. Thus, “ A vL mE vB neb “ becomes “ A very large, much extended, elliptic or elongated, very bright nebula “. He also notes that in addition to this observation, #61, noted down from sweep #306, V.1 was also observed in sweep #292, “but no place was taken”. The figure to which he refers , figure 52, is included towards the back of his paper and is a sketch he made of the Sculptor Galaxy. to be continued ...
  22. The Eagle Nebula Messier 16 ansd Open Cluster NGC 6611 in the constellation Serpens. ( click on image to see larger ) M16 is around 7,000 light years distant from Earth in the Sagittarius-Carina spiral arm of our Milkyway galaxy and may be part of a larger structure that extends to and includes the Omega Nebula ( M17 ) in Sagittarius. Details: Eagle Nebula - Messier 16 ( IC 4703 ), Open Clusters - NGC 6611 and Trumpler 32. RA ~ 18h 19'm45s Dec ~ -13deg 46' 20" Skywatcher Quattro 10" f4 Newtonian telescope. Skywatcher AZ Eq6 GT Mount.Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. ISO800, 14bit NEF, Long Exp. NR on. 35 x 180sec (1/3 before & 2/3 after zenith) 17 July 2015. PixInsight re-processed 21 Aug 2016.. Links: https://500px.com/MikeODay http://photo.net/photos/MikeODay
  23. Coachella Valley Astronomy

    Rosette Nebula

    The Rosette Nebula taken in Cathedral City, CA I've wanted to image the Rosette nebula for some time now, but with my Celestron 6se telescope it was not really feasible due to the large focal length of the scope. The Rosette nebula is huge! I decided to give it a try with my new Orion ST80, and I could not be happier with how it turned out. It is certainly not a Hubble image, but I did the best I could under light polluted skies, and man does it look beautiful. 5 hours total exposure time Canon 450d Orion ST80 Orion Skyglow filter Celestron AVX mount Stacked in DSS Edited it CS6 and LR http://coachella-astronomy-astrophotography.blogspot.com/2017/02/the-rosette-nebula.html
  24. Conditions have been very poor down in Sydney for the last month (rain, clouds or 'darn' moon every night ) so no new images but at least I have plenty of time for lots of reprocessing ... This one was captured back at the beginning of the year and I'm still playing with it. Here I have been trying to get to grips with the HDR composition function in PixInsight. It is built up from four sets of around 20 images each at 4sec, 8sec, 30sec and 120sec all at ISO800 with my unmodified Nikon D5300. And this is the previous attempt. I think I prefer the composition, colours and contrast of the new version.
  25. Hi, I took this photo during Sep, Oct and Nov of 2015 with over 14 Hours of exposure. This is the longer exposure I ever made on one object, personal record For better resolution: https://www.flickr.com/photos/101543943@N04/22815861829/in/dateposted/ Hope you like it. Thanks much, Haim
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