So. Any telescope builders/users here? Got a question for you.

Discussion in 'The Watering Hole' started by cvanc, Jan 21, 2014.

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  1. Jan 21, 2014 #1

    cvanc

    cvanc

    cvanc

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    There is a special kind of flat black (light-absorbing?) paint you guys use to kill all reflections on the inside of your tubes. What is it called and where do I get some?

    Thanks!
     
  2. Jan 21, 2014 #2

    Astronot

    Astronot

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    Are you talking about this stuff

    Deep Black Optical Paint For Europe Market

    If State side, a lot of telescope builders use Krylon Ultra Flat Black, or Krylon Camo Flat Black, both with very good result. Your local Walmart may stock it.

    David
     
    Last edited: Jan 21, 2014
  3. Jan 21, 2014 #3

    Derek

    Derek

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    I've read a lot of people use flocking to line the inside of their otas.

    Like this stuff:

    http://www.scopestuff.com/ss_flok.htm

    Obviously a little more expensive than spray paint, though.
     
  4. Jan 21, 2014 #4

    Darian Rachal

    Darian Rachal

    Darian Rachal

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    What size telescope are you talking about?
     
  5. Jan 21, 2014 #5

    cvanc

    cvanc

    cvanc

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    It's not a telescope at all, my need is to solve some reflection problems in a lens. (well, actually, NEAR the lens - external screws in the light path are silver and seem to be causing trouble).
     
  6. Jan 22, 2014 #6

    o1d_dude

    o1d_dude

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    'I battle gravity'

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    Refracting telescopes generally use baffles to keep the light in the "cone". I believe cameras use similar baffles. Not sure of the application you're trying to solve.
     
  7. Jan 22, 2014 #7

    Darian Rachal

    Darian Rachal

    Darian Rachal

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    I know Edmund Scientific used to sell some flat black optical paint, probably similar to the European brand in an earlier post. That's the route I'd go.:)
     
  8. Jan 22, 2014 #8

    Astro-Baby

    Astro-Baby

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    Its done by either flocking which is a felt like material, look up protoboard on Google. There are various optical paints as well but most people would use Blackboard Paint. blackboard paint is cool because it applies to a flat black thats quite durable on just about any surface. Warning here, blackboard paint needs to be stirred and stirred and stirred before use. If its not fully stirred it tends to dry shiny. Hope thats some help.
     
  9. Jan 22, 2014 #9

    Rocketry nut

    Rocketry nut

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    I built a reflector telescope years ago and used flat black Krylon I believe. It's cheap and effective. No complaints at all.
     
  10. Jan 23, 2014 #10

    Maxx Mayhem

    Maxx Mayhem

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    You can get the flocking from Woodcraft.com.
     
  11. Jan 23, 2014 #11

    caveduck

    caveduck

    caveduck

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    If the shiny screws are the main source of trouble you can just try replacing them with black anodized ones.
     
  12. Jan 23, 2014 #12

    bobkrech

    bobkrech

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    1. Use black oxide steel or stainless steel screws.

    2. Make a black baffle from medium grit silicon carbide or aluminum oxide sand paper painted with Krylon Ultra Flat Black, or use black flocking.

    Bob
     

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