Astro Image of the Lagoon and Trifid Nebulas

Discussion in 'The Gallery' started by avandonk, Jun 27, 2009.

  1. avandonk

    avandonk Member

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    Here is a widefield of the Lagoon and trifid Nebula. 9MB

    http://d1355990.i49.quadrahosting.com.au/2009_06/image.jpg

    It was taken with the Canon 5DH and Canon 300mm F2.8L at f/5. All at 400ISO.

    Fridge at -10c, EQ6 guided with Guidemaster with dithering. Dithering moves the mount between each exposure. Dithering if you stack images upsized you can actually double the MP of the sensor.

    Exposures 20x (1 min, 2 min, 4 min) and 15x8 min. Hutech LPR filter. Sky was very clear.


    Raw images corrected for flats and darks converted to 16 bit fits. Fits were then stretched and converted to 16 bit tiffs. These tiffs were then upsized by a factor of 1.5 (75MB to 160MB).

    I started with the shortest exposure set and worked up from there. This has the effect of obtaining higher real resolution than that of a single frame. Registar was used to median stack these sets of exposures. EasyHDR to produce the final tone mapped image from these four exposure stacks.

    The lens is now temperature controlled so focus is constant no matter what ambient temperature does.

    Just to let you blokes know what us nerds are doing!

    Bert
     
  2. Zee

    Zee Member

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    I have NO IDEA what you are talking about, but man, I love the shot!

    Z...
     
  3. pec_tacular

    pec_tacular New Member

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    Wow....

    All those things you said sounded expensive hahah.... I'm totally newb on this stuff... How does on cool the camera while shooting and temperature control a lens?
     
  4. Carey

    Carey Member

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    WOW....... just amazing! That is really a breathtaking sorta shot, those nebulas look freakin sweet!
     
  5. xhanatos

    xhanatos Member

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    daaaamn.. :eek:
     
  6. Squeezer

    Squeezer Member

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    Wow.. You camera produces so much noise ;) ..j/k

    I always like seeing your Astro photos
     
  7. Walshy

    Walshy Member

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    My god, it's full of stars!

    :lol:

    Nice pic. I'd love to take some nice astro pics, but I just know I'm not going to get into it to the extent you serious amateurs do, and my pics would look crap by comparison... :rolleyes:
     
  8. triggerpeg

    triggerpeg Member

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    I like .. pretty amazing the stars. Check out that thing on the left! the blue-red twin-nebular?
     
  9. yangby

    yangby Member

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    HOLY shit!!!!!


    Awesome pic :thumbup:
     
  10. Joehax

    Joehax Member

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    That is a fantastic shot, but could you please elaborate a bit more on this temperature controlled lens?

    I also didn't understand how a Fridge fitted into this shot?

    I'd love to understand a bit more on how you took that photo :thumbup:
     
  11. OP
    OP
    avandonk

    avandonk Member

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    Here are a couple of pics of the set up. The Canon 5DH is inside the gray fridge. I have modified the fridge to run two peltiers and the temperature can be set and controlled to 0.1C of the set temperature. The lens is focussed by a stepper motor and is warmed by dew heaters that are thermostatically controlled. This is so focus does not change with ambient temperature. In this picture the dew heaters are still on the dew shield.

    Bert

    [​IMG]
    Click to view full-sized image!
    Hosted by UGBox Image Store



    [​IMG]
    Click to view full-sized image!
    Hosted by UGBox Image Store
     
  12. computer newbie

    computer newbie (Banned or Deleted)

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    head explodes..

    what would th cops do if they saw that?

    think theye'd be mighty confused.

    oh my god. very nice pic man:thumbup:.
     
  13. Lukey

    Lukey Member

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    Excellent as always mate, very nice. Nice hosting ya got there too, loaded nice and fast!
     
  14. triggerpeg

    triggerpeg Member

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    Very impressive set up avandonk ...but can it shoot down a plane? ;)

    I guess the details involved with astro photography sometimes elude us normal peeps. Thinking multiple long exposure is fine but i guess your setup would be considered simple in the astro-field?

    any plans to set up a back yard observatory?
     
  15. bevanbraves

    bevanbraves Member

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    No cupholders?
     
  16. OP
    OP
    avandonk

    avandonk Member

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    Here is a two frame mosaic of the Antares and Rho Ophiuchus area. The Moon is to scale. This shot proves I can do a few things in Photo Shop. I did it for a bit of fun. It is actually a picture of a 3m model in the Smithsonian Museum.

    Large Image 4MB
    http://d1355990.i49.quadrahosting.com.au/2009_06/01.jpg


    Yes those colours are real. The brown bits are interstellar dust clouds lit by nearby stars. The dust gets the yellow colour from the bright yellow star Antares in Scorpius.

    Bert
     
    Last edited: Jun 29, 2009
  17. crepuscular

    crepuscular Member

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    brilliant, totally brilliant~!:thumbup:
     
  18. ASIGN_Baz

    ASIGN_Baz "Maker of awesome stuff"

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    Fancy meeting you here Bert!

    Great widefield mate!:thumbup:

    Baz.
     

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