Page 1 of 2 12 LastLast
Results 1 to 10 of 12
  1. #1
    Gary Heath's Avatar
    Gary Heath Guest

    Default What color, Lumicon OIII filter



    What color does your Lumicon OIII filter make trees and the sky appear to be
    when you look through it in daylight?
    The one I (now) have does not match the colors that I would expect to see
    based upon the information on the Lumicon filter FAQ page.
    It makes trees look red, and the sky is not green, instead it is blue in the
    center, and fades to red from about 1/3'rd of center and out to the edges,
    when I hold it up to the sky and look through it.
    It actually better matches the description of an H-Beta filter (based the
    Lumicon's Filter FAQ page) but does enhance views of the Veil and M17.
    This filter was what I ended up with after lending my original (and marked
    on the rim) Lumicon OIII filter, to a person at a star party that wanted to
    compare his standard 'unmarked' Lumicon OIII, with my Premium OIII.
    He swapped them when he returned mine, and I didn't use it again for quite
    some time.
    As indicated, it does work (but not as well as my original) in my 20", but
    seems to be of no, or very little value in my 12" SCT, when my original had
    an easily discernable effect.
    In any case, if you have a Lumicon OIII filter could you please post what
    you see when you look at the sky, and the same if you have an H- Beta?
    Thanks,

    Gary "somewhat less trusting with lending my stuff" Heath



  2. #2
    Dennis Woos's Avatar
    Dennis Woos Guest

    Default What color, Lumicon OIII filter

    "Gary Heath" <Marvin Martian@"No-Green-Eggs_N_SPAM".com> wrote in message
    news:R-ydnWVCBaqSZ8vcRVn-gA@comcast.com...
    be
    the
    to
    had

    Mine (marked Lumicon OIII on the edge), makes:

    1) the blue sky look green in the middle of the filter, and purple on the
    edges.
    2) green trees look dull green/gray, with the red and yellow leaves look red
    (the leaves are already turning here).
    3) makes some yellow stuff look very red - my wife's chrysanthemums look
    intensely/flourescent red.

    Dennis



  3. #3
    David Knisely's Avatar
    David Knisely Guest

    Default What color, Lumicon OIII filter

    Gary Heath posted:


    Well, Lumicon's newer OIIIs don't have the red secondary passband that many of
    the older ones do. My old 1.25" OIII will pass quite a bit of red, but so
    does my H-Beta filter. My new 2" OIII from Lumicon has little or no red
    transmission, so objects look a sort of bluish-green color. The H-Beta's
    passband is more in the blue, but it also has a red passband similar to that
    of the old OIII but a bit more towards the middle of the spectrum (passes
    H-alpha quite nicely). Clear skies to you.
    --
    David W. Knisely KA0CZC@navix.net
    Prairie Astronomy Club: http://www.prairieastronomyclub.org
    Hyde Memorial Observatory: http://www.hydeobservatory.info/

    **********************************************
    * Attend the 11th Annual NEBRASKA STAR PARTY *
    * July 18-23, 2004, Merritt Reservoir *
    * http://www.NebraskaStarParty.org *
    **********************************************




  4. #4
    John's Avatar
    John Guest

    Default What color, Lumicon OIII filter


    "David Knisely" <ka0czc@navix.net> wrote in message
    news:GPD5d.342$6b6.78@fe61.usenetserver.com...
    many of

    Hi, David.

    I guess that answers the frequently-heard question about whether the current
    company is selling the same product as Lumicon did before they folded. I had
    an early Lumicon OIII which passed red. I got rid of it since the OIII line
    is far from red and thus any visible red is spurious. I switched to Tele
    Vue - no undesired "extra" passbands.

    John C



  5. #5
    Rod Mollise's Avatar
    Rod Mollise Guest

    Default What color, Lumicon OIII filter

    >In any case, if you have a Lumicon OIII filter could you please post what

    Hi:

    The OIII gives things a reddish cast.

    Peace,
    Rod Mollise
    Author of _Choosing and Using a Schmidt Cassegrain Telescope_
    Like SCTs and MCTs?
    Check-out sct-user, the mailing list for CAT fanciers!
    Goto <http://members.aol.com/RMOLLISE/index.html>

  6. #6
    Gary Heath's Avatar
    Gary Heath Guest

    Default What color, Lumicon OIII filter

    Thanks for the replies guys.
    After reading them, I'm sure the filter I ended up with is an OIII.
    But one that is possibly just not as good as my original Premium was. :-(

    Gary



  7. #7
    David Knisely's Avatar
    David Knisely Guest

    Default What color, Lumicon OIII filter

    John C. posted:


    Actually, I do like my OIII with the "red" secondary passband, as in my 10
    inch, I can actually see some of the faint reds in M42 and M8 with that
    filter. Some of the red is probably filtered light scattered off dust in the
    nebula, but some of the rest is the stronger areas of H-alpha emission which
    is present in both objects. The red thus isn't really spurious, as it is
    really there. Clear skies to you.
    --
    David W. Knisely KA0CZC@navix.net
    Prairie Astronomy Club: http://www.prairieastronomyclub.org
    Hyde Memorial Observatory: http://www.hydeobservatory.info/

    **********************************************
    * Attend the 11th Annual NEBRASKA STAR PARTY *
    * July 18-23, 2004, Merritt Reservoir *
    * http://www.NebraskaStarParty.org *
    **********************************************



  8. #8
    David Knisely's Avatar
    David Knisely Guest

    Default What color, Lumicon OIII filter

    Rod Mollise posted:


    Not the new Lumicon OIIIs (at least the 2 inch models). They only have the
    OIII passband. Clear skies to you.
    --
    David W. Knisely KA0CZC@navix.net
    Prairie Astronomy Club: http://www.prairieastronomyclub.org
    Hyde Memorial Observatory: http://www.hydeobservatory.info/

    **********************************************
    * Attend the 11th Annual NEBRASKA STAR PARTY *
    * July 18-23, 2004, Merritt Reservoir *
    * http://www.NebraskaStarParty.org *
    **********************************************




  9. #9
    Glen Baker's Avatar
    Glen Baker Guest

    Default What color, Lumicon OIII filter

    I was sent an unmarked Deep Sky Filter even though I ordered a OIII filter
    from a well know NY dealer.

    Check with a spectroscope ( a cheap one or make one from a CD will do).
    Your description sounds a bit too much like the Deep Sky Filter for me.

    Glen

  10. #10
    Dan McShane's Avatar
    Dan McShane Guest

    Default What color, Lumicon OIII filter

    Gary Heath <Marvin Martian@"No-Green-Eggs_N_SPAM".com> wrote in message
    news:R-ydnWVCBaqSZ8vcRVn-gA@comcast.com...
    be
    the
    to
    had

    Hi Gary,

    Are there any spectral curves posted on the net of the OIII`s, original and
    current?
    I`ve looked but came up empty.

    thanks,
    Dan McShane


    ---
    Outgoing mail is certified Virus Free.
    Checked by AVG anti-virus system (http://www.grisoft.com).
    Version: 6.0.768 / Virus Database: 515 - Release Date: 9/22/04



 

 
Page 1 of 2 12 LastLast

Similar Threads

  1. Older Lumicon Filter Question
    By Alan French in forum Amateur Astronomy Forum
    Replies: 6
    Last Post: 10-10-2010, 02:49 AM
  2. Lumicon Deep Sky Filter
    By Nodgiles in forum Deep Sky Objects Forum
    Replies: 21
    Last Post: 01-15-2009, 07:35 PM
  3. Anyone in Southern Ontario with Lumicon H-Alpha 1.5a filter?
    By Astronut in forum Amateur Astronomy Forum
    Replies: 5
    Last Post: 01-09-2004, 06:02 AM
  4. OIII spectrum test of Lumicon, Thousand Oaks & TeleVue filters etc
    By Maurice Gavin in forum Amateur Astronomy Forum
    Replies: 0
    Last Post: 07-30-2003, 08:54 PM
  5. Mars through a Lumicon UHC filter
    By Doogie Hoosier in forum Amateur Astronomy Forum
    Replies: 0
    Last Post: 07-25-2003, 08:56 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin® Version 4.2.0
Powered by vBulletin®
All times are GMT. The time now is 07:10 PM.