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Specman

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About Specman

  • Rank
    Star Forming

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  • Location
    Orkney Islands, Scotland
  1. Thanks James, Yes I figured they are 8mm but no details regarding exact length. If they are too long they will damage the wedge. I can mess about, order different sizes and try them out, but it cost a lot of dosh and I'd rather not wing it. Thanks for you help though
  2. Hey Guys! Anybody know what size and length bolts I need to mount my Astrotrac Wedge to the Pier Plate? In their infinite wisdom, Astrotrac don't include bolts to fit everything together, in the package! Knor do they include instructions THREE BOLTS! Have you seen the cost of these things? I ask you, is it just me? Thanks for your help, in anticipation
  3. Specman

    re HEQ5 and time

    Have you centred your polar scope Ant? I use a compass and straight edge to chalk out north, south, east, west cross on my patio to set up my tripod. I store my HEQ5 preset to 60 degrees north so never need to mess with that, just level my tripod. The more time I take with polar alignment and the more critical I am the more accurate it is. Another good trick is to synch to a star near the target object, you get much better tracking that way. All my sessions to date have been unguided, just getting into that this season. Clear skies Mark
  4. Specman

    re HEQ5 and time

    OK as per sig, ED80 plus focal reducer, 600mm focal length using a Canon 1000D, 5.7um for the techies amongst us! But the fact remains, good polar alignment 90sec to 2 minutes easy! As others have posted.
  5. Specman

    last nights attempt at M51 with 1100D

    You may get better results with a DSO instead of a galaxy. My 1000D is unmodded as yet and I don't need LP filters as I have pretty dark skies in the winter. Good luck with the cooler
  6. Specman

    re HEQ5 and time

    A properly polar aligned HEQ5 will easily do 90sec to 2 min exposures at f6.5 Mine does! Clear skies Mark
  7. Specman

    last nights attempt at M51 with 1100D

    Hi, I was getting reduced subs imaging Andromeda using the in camera NR. I had planned 50 but only managed 37 before it dropped out of sight behind the house. A 90sec exposure was taking 270sec with cool down between shots. I think you are doing everything right, I was also using 800 ISO but I wouldn't go any higher on the 1000D or 1100D. I think dropping it down to 400 would reduce the noise and planned to give that a try, uping my exposure times. I use the following for camera power and it reduces glow from the battery (I see you made your own) Astronomiser - Automated Astronomy and AstroImaging Solutions I'm also going to give this a try Astronomiser - Automated Astronomy and AstroImaging Solutions I was talking to Saturn 5, (stewart) about noise as he owns a 1000D & a 5D MkII, his pics are always perfect and mine always seem grainy and red blotchy. I sent him a RAW tiff to have a look at and he thought that they were pretty good and nothing wrong with my settings or image. He said he has the same issue with his 1000D but compared to his 5D MkII, which is one of the best cameras on the market for low noise night time shots, anythings going to struggle to compare. The red blotching is annoying, I agree. It took ages to process out of my M42 image, but once I got the right advice, PixInsight cleaned it up. If you tried all of the above then the long and the short is, for a £300 DSLR its pretty good and you processed most of it out. its never going to be as good as a shot captured on a £2000K camera. Maybe have another shot at processing, PI has the ability to process the background and protect the image. Maybe somethin you could try (they do a free trial period so you could test it out) Your image is still great though, well done!
  8. I agree, late summer would be a far better time it would give us our Astro fix during the long days and be in time for the new season.
  9. Specman

    last nights attempt at M51 with 1100D

    Nice Job! Is your Canon set to long exposure noise reduction. This kinda does darks for you as you go but obviously your own darks are the way to go. I also find Bulb exposure RAW images at hi ISO noisy but I think that's the nature of the beast, you are capturing everything, noise and all. Lower ISO and longer exposure may be an answer. I have my Canon running on a remote battery which helps with noise from battery heat but on long exposures you are still getting amp glow. I get that red speckling at times and I have also had Canon banding, as I say I think its a RAW, CR2, ISO thing. I wouldn't push the ISO on a 1000D past 800 as I think it gets way too noisy. I process in PixInsight and they have some tools that remove the worse of it. Nebulosity will also take care of some of it as you said. Well done anyway, I love your image.
  10. Got a couple of hours viewing in before the clouds rolled in. These were taken between 19:30 and 20:00 Thanks for looking!
  11. Caught this image whilst chasing Aurora between the clouds tonight at 19:52. ISO800, 25 sec exposure. Couldn't make out Jupiters moons though, Venus was washing them out I think.
  12. Specman

    Widefield

  13. Specman

    Aurora Images

    A sequence of images shot with my Canon EOS 1000D fitted with a EFS 18-55mm lens. Manual focus, remote shutter release but not tripod! (I forgot to bring it!) Stunning Aurora over Orkney between 9pm and 1am 11-12th March 2011
  14. I didn't plan the set up with the scope in mind. The idea was to use the scope on the Astrotrac in place of a Canon 200mm lens
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