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Found 59 results

  1. From the album: Astro snaps

    Canon 400D, 15s exposure, Gaussian blur in Gimpshop to remove light pollution
  2. Jupiter & Peniel Heugh - Merry Christmas from Scottish Borders! by mikeyscope, on Flickr Looking like the star of Bethlehem planet Jupiter shines brightly in conjunction with Hyades & Pleiades star clusters in this early morning scene looking west with daylight fast approaching over the Waterloo Monument on Peniel Heugh, Scottish Borders Pentax K5 Pentax DA 17-70mm F4.0 AL (IF) SDM Exp 30 secs iso 800
  3. Hi folks, yarp - yet another re-process. I've come a long way from the original as I've learnt new processing skills. This is from the same data - I hope the result pleases. The Pleiades - M45Bob
  4. Hi everyone, was out last night till 2.00 ish brrrrr!!!, my first serious attempt at Pleiades on my un-modded 600D & no filters Canon 55-250mm @ f5.6 (would Baader Blue filter help bring out more detail ? ), fighting against all night dew was a headache but that's why i bought the wife a nice hair dryer for , final shot is 3 subs @ 1600 / 20 secs, 8 subs @ 1600 / 60 secs, 10 dark frames & 5 flat frames (i keep forgetting to do them), processed in DSS & CS6. My 'main' stars seem blown, i used levels + curves but not sure exactly what to adjust to reduce the bright whites but keep background dark & keep blues in tact ? I'm please how it's come out & hope you like it too.
  5. Hey folks, this is an attempt to image m45 and get the nebulosity of the "seven sisters". 20subs * 30sec on ISO 1600. enjoy, please free to comment and collaborate. theo
  6. From the album: Widefield DSO

    As previous data but with SCNR green in PixInsight.
  7. Not the most original title I know, but that's how I felt at the time too. Canon 450D all filters removed. Sigma 120-300 f/2.8 OS at 300mm f/2.8. Astronomik CLS-CCD. EQ6 guided. Processing with flats in PixInsight+PSE. 32x2m subs. 19x2m subs. It wasn't looking clear, so I didn't set up early. But it did clear up and looked too good to waste, and I was running by 10pm. My previous plan was to get some extra data on the Veil, but with a new CLS-CCD filter I had to try that out. It's more suited to broader spectrum subjects, so I revisited Andromeda and also took a quick shot at Pleiades. Neither have enough data so the noise floor is relatively high. Also the Andromeda set isn't great as I had uncorrected focus shift since I didn't pre-cool the lens enough before using it. I used the modified 450D with the new filter to gain more red sensitivity, however I suspect its noise floor is higher than the unmodified 600D (with old filter) I used previously on Andromeda. Also I think the two data sets might be too different to combine to see if I can get more information out of it. Everything was covered in dew and I packed up just after midnight.
  8. From the album: Widefield DSO

    Canon 450D all filters removed. Sigma 120-300 f/2.8 OS at 300mm f/2.8. Astronomik CLS-CCD. EQ6 guided. 19x2m subs. Processing with flats in PixInsight+PSE.
  9. Hi folks, The Pleiades were the subject I chose for "first light" when I got my imaging system up and running earlier in the year. I promised myself I would return to them in the autumn and here's the result, uncropped apart from a 48 pixel wide border but then downsized by a factor of four: The PleiadesI've linked to a larger (2048 x 2048 pixel) version which you can see by clicking the image. The 4096 x 4096 pixel original doesn't really add anything to the party in terms of extra resolution of the nebulosity. The subs used were 5 x 1,000 seconds blue and 5 x 200 seconds in each of red, green and blue using my Astrodon Tru-Image filters. As ever the 'scope was my TEC 140 and the camera an ML16803. Processing was a real challenge for me because the brightest stars were still well blown even on the 200 second subs. In the end I decided to do without any shorter exposures so I combined the 200 second RGB subs to get a colour image and combined the 200 and 1000 second blue subs using PI's HDRComposition tool to get a much deeper image of the reflection nebulosity while still controlling the size of the brightest stars. That image then had its stars removed and that's where the fun started as there was no way I could reliably clone out the brightest stars as they were so intimately bound with the illumination of the surrounding gas and dust. In the end I opted just to darken the very brightest stars as the whole purpose of the exercise was to try and prevent ringing during subsequent processing of the nebulosity and ringing is basically triggered by very sharp transitions in brightness. Anyway, the "no stars" image went back from Photoshop into PI where the tool of choice was LocalHistogramEqualisation. The original plus the LHE version were both processed further in Photoshop and then blended together and the result coloured using a Curves layer. The cleaned up and enhanced RGB image was then added as a screen layer which neatly added the stars back, including over-painting those problematic very bright ones, and also slightly modified the colours of part of the brightest areas of the nebulosity. Obviously there were lots of extra tweaks along the way but those were the headline steps. Quite an adventure and there's always a worry that the end result owes too much to the choices during post rather than reflecting (sic) what was actually there but I'm pleased with the result, especially as I wasn't expecting to see so much structure so distant from the Pleiades themselves. I hope you like the result. Bob.
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