Narrow Band Imaging

Discussion in 'Astronomy, Exobiology, & Cosmology' started by Xelasnave.1947, Aug 25, 2018.

  1. Xelasnave.1947 Valued Senior Member

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  3. Write4U Valued Senior Member

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    ~~~~~~~~~~~~~~~~~WOW~~~~~~~~~~~~~~~~~~~~~~~~


    The world of GIANTS!!!!!!!!
     
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  5. Xelasnave.1947 Valued Senior Member

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  7. Write4U Valued Senior Member

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    Question; Is it possible to recreate (simulate) the universal patterns as they must have appeared to an observer on earth say, a million years ago?
     
  8. Xelasnave.1947 Valued Senior Member

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    You can download a free program "Stelarium" and you can put in a date...I dont know how far back it goes...but I expect there would be something available if it does not do it...
    Alex
     
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  9. Xelasnave.1947 Valued Senior Member

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    Here is another photo of the Horse Head Nebula using the 80 mm refractor.
    About an hour of 35 second exposures.
    The interesting thing with this one is I could only get a mono luminance image and made from it a number of single coloured images and built up the colours using photoshop...I coloured in a black and white in effect☺
    But the clouds made me do it as I would like to have captured all channels.
    Anyways here it is.
    Alex

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  10. Xelasnave.1947 Valued Senior Member

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    Another short one..Thru 80 mm refractor 50 minutes in HA only before the clouds prevented other chanel capture...however I used the little I had applied a little photoshop magic and produced this.
    The central object(to the right of center) is the Tarantula Nebula and is located in a small neighbour galaxy The Large Magellanic Cloud about 160,000 light years approx. from Earth and contains about 30 billion stars.
    alex

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  11. Write4U Valued Senior Member

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    Amazing how the patterns emerge from such chaotic conditions. Fractal filaments, reminiscent of giant cellular structures.
     
  12. Xelasnave.1947 Valued Senior Member

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    I took the above last night but this one is the large cloud using a dslr and a cheap telephoto lens taken anout a year ago.
    You can notice the above nebula in this image.
    Alex

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  13. Write4U Valued Senior Member

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    I can see you fascination with deep space. This is really trippy, if you let your mind wander a few billion light years into the past.
     
  14. Xelasnave.1947 Valued Senior Member

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    Here is another horse head which used double the data and had some heavy proceesimg in photo shop...I still need three more channnels of data but as its cloudy and I am laid up I thought I would see what I could get with what I have so far.

    Alex

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  15. Write4U Valued Senior Member

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    Stunning!!!!!!!!!!!!!
     
  16. Xelasnave.1947 Valued Senior Member

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    Thank you but I have a long way to go...
    Here is where I was 12 months ago but this was with a dslr and thru the 8 inch

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    Alex
     
  17. Write4U Valued Senior Member

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    I call that remarkable progress!
     
  18. Xelasnave.1947 Valued Senior Member

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    Well you must remember that the narrow band camera is just so far ahead of a dslr.
    One of the problems with long exposures is "noise".
    There is a variety but think of it this way...the sensor gets hot and triggers false messages...a "hot" pixel will just appear white for example...the hotter the more you get.
    The narrow band camera has a cooling device, the same sort of unit you get in your consul car coolers ( not a fridge but a thermal electric device...can be used to heat or cool) ...so I have been shooting at 15 degrees c below and much less noise...further I shoot now with seven different filters whereas the dslr its one shot.
    All up I need 28 groups of photos☺ so far U have not been able to do everything...when I get the whole act together the photos will be better but maybe not noticable if you are not in the game.

    There is still so much to do I think I will be another year before I have everything adjusted perfect...
    I need to "hot rod" the eight inch..instal light baffles add stuff to reduce flex and change out the focuser...maybe a grand ...you can spend up to four grand for a good focuser.
    But I will re engineer my focuser by adding additional bearings add felt to the draw tube...really do a number and hopefully make it better than a four grand one☺

    Thanks for your intetest.
    I post here hopefully to help with the site traffic.

    Alex
     
  19. Write4U Valued Senior Member

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    This is fascinating stuff. Who would have guessed that environmental and equipment temperature has an effect on the recorded wavelengths. I didn't, but now that you brought attention to it, it makes perfect sense and sheds more light (so to speak) on the inherent problems of cosmic photography.

    I did a fair amount of photography in my day, even did a short stint in professional photography restoring old logging and city photographs taken in early 1900s, and won a blue ribbon for some B&W submissions at a state fair.

    I am an avid fan of Ansel Adams and the zone system in B&W photography. I was fortunate to inherit a 4x5 Linhof camera and had a Beseler enlarger and dark room.

    But your work is at an entirely different level, I love it!
    IMO, you do SF proud.
     
    Last edited: Dec 16, 2018
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  20. Xelasnave.1947 Valued Senior Member

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    Thanks for your interest.
    I am just a mug at it and it really makes huge demands on me...I have about 3000 pages on the mount, the programs for it, the aquisition programs, control software, stacking and processing softeware and at my age it is really really hard...because of my legs I was laying in bed all day and my only high point was arguing with the god but by getting back into it I had to move build stuff think about stuff so it got me going again...

    If you have a dslr you can do some stuff.
    Mount your camera on a tripod at the shortess focal length take a thousand shots of say your part of the milky way, stack them in the free software ( easy as) and have a fiddle in photo shop or better still Gimp which is free.
    If you are interested I would be happy to help.

    These recent shots are basically B/W and I really just colour them in using photo shop...the processing is at least fifty percent of the game.
    These recent shots data wise were rather crook and I did not take dark frames ot light frames so noise was over the top and I had guiding problems so they are shorter than they should be for narrow band...but I used them to practice processing and I went to a new level trying to make a silk purse outta a sows ear situation.
    I hope I can help the site a little by maybe generating a little traffic.

    I like the people here.
    I dont get to mix with reasonably intelligent folk in the teal world...well I dont mix with anyone at all really...after years of people people people I dont like company other than my own.

    Alex
     
  21. Xelasnave.1947 Valued Senior Member

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    Here is the same object as posted on 6/12 but with much more good data.
    About 4 hours all up.
    Still not as good as it should be but each one is practising for the next.

    Tried a different colour approach added a seperate core to save blown out data.

    Anyways hope you all like it.
    Alex

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  22. Write4U Valued Senior Member

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    Woo Hoo.. Spectacular!
     
  23. Xelasnave.1947 Valued Senior Member

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    Thank you for your enciuraging comment.
    I am not sure if I ever mentioned it but this is the middle star in the handle of the big dipper☺
    So when you look at it and see just a star know my photo hints at much much more.
    Alex
     

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