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Thread: George's Telescope - Consolidated Threads

  1. #16
    "What? No lense caps? Astronomers NEED lens caps!"

    Working on that...
    Last edited by David DeCristoforo; 04-21-2017 at 8:38 PM.

  2. #17

    Voila...

    Lens caps...

    caps_10.jpg
    David DeCristoforo

  3. #18
    Excellent! Great in every way! How do they stay on the scope? Friction fit... Screw on... O ring in a groove... Something else?

    c

  4. #19
    Quote Originally Posted by Clint Bach View Post
    ... How do they stay on the scope? Friction fit... Screw on... O ring in a groove... Something else?

    c
    Friction fit with leather liners that were moulded over a form and then cemented into the wood caps.

  5. #20
    Join Date
    Mar 2011
    Location
    Pendleton, KY
    Posts
    803
    Wow, DD. You're going all out on this! I, too, am glad to see you posting again. Your work is exemplary, as usual.

  6. #21
    Join Date
    Oct 2011
    Location
    Colorado Springs
    Posts
    976
    Great to see you posting again. Love the scope.
    "Never try to teach a pig to sing. It wastes your time and annoys the pig." Robert Heinlein

    "[H]e had at home a lathe, and amused himself by turning napkin rings, with which he filled up his house, with the jealousy of an artist and the egotism of a bourgeois."
    Gustave Flaubert, Madame Bovary

  7. #22
    FWIW... I took the whole thing apart yesterday and throughly cleaned the lenses and prism. Then took it outside to test it out. Seems to work just fine!

  8. #23

    Telescope Mount Progress

    I have had little time lately for turning or posting. But I have managed to creep forward a bit on the telescope project. This is the polar shaft for the mount, the basic plan for which can be seen here: http://daviddecristoforo.com/Misc/mount.pdf

    locking_3.jpg

    This is six inches in diameter and twenty inches in length. The "axle" is a 2" diameter hard maple shaft. The housing was made from a laminated tube purchased from Anderson International. I was origionally planning on laminating my own tubes but the price on these is very fair and I was not up for doing this on my patio! Plus, my son's family bought these as a Father's day gift so I could hardly refuse....

    The knurled "washer" on the end is threaded and serves as a tensioning ring. The "finial" is also threaded and locks down against the "washer"

    These are the bearing housings, turned from hard maple and "ebonized", one for each end of the two shaft housings:

    bearings_4.jpg

    I also added a rotation lock. I was not completely sure how this would be made but ended up with a simple threaded dowel. It was the first time in many years that I have had an oppurtunity to use my thread boxes.

    locking_2.jpg locking_1.jpg



    More to come.......
    Last edited by David DeCristoforo; 09-04-2017 at 1:49 PM.
    David DeCristoforo

  9. #24
    Precision work from the master!!! Good stuff, David.

    Here is the previous thread on David's project - http://www.sawmillcreek.org/showthre...e-Finder-Scope
    Last edited by John Keeton; 09-04-2017 at 2:27 PM.

    Left click my name for homepage link.

  10. #25
    Join Date
    Dec 2010
    Location
    Republic, Wash. State
    Posts
    1,149
    A second to John Keeton' comment. It is always good to see your works.
    C&C WELCOME

  11. #26
    Join Date
    Feb 2008
    Location
    E TN, near Knoxville
    Posts
    6,210
    Once again your work is outstanding. I'm happy to read whenever you can post. I want to buy the book when you are finished.

    JKJ

  12. #27

    Telescope Mount Progress - combined with Master thread

    Moving along, albeit at a snail's pace! (Sorry about the crappy "photos")

    two_shafts_2.jpgtwo_shafts_1.jpg
    David DeCristoforo

  13. #28
    Join Date
    Feb 2008
    Location
    E TN, near Knoxville
    Posts
    6,210
    I look forward to seeing new pictures on this! In fact, I'd be tempted to take a trip to see it with my own eyes some day! Beautiful work - I can't imagine the number of hours you have in this so far.

    (To me, the photos are perfect. Time for studio quality later!)

    I carried two of my (store bought) telescopes to a fellow woodturner's place (John Lucas) for the recent eclipse. Amazing. I don't know if you saw this picture earlier but he made this hand mirror for me to remember the occasion:

    eclipse_mirror_lucas_500671_1.jpg
    http://www.sawmillcreek.org/showthre...-by-John-Lucas

    JKJ

  14. #29
    Join Date
    Oct 2006
    Location
    Harvey, Michigan
    Posts
    20,325
    David - for most of us, learning how to turn is a lot of fun but extremely challenging when trying to turn two things that look alike. The precision you show in every aspect of your telescope is amazing but I am afraid leaves most of us searching for words. I look forward to each update and really want to see the photos when your grandson actually gets the telescope! Thanks for sharing the journey!!
    Steve

    “You never know what you got til it's gone!”
    Please don’t let that happen!
    Become a financial Contributor today!

  15. #30
    Quote Originally Posted by David DeCristoforo View Post
    ...(Sorry about the crappy "photos")...
    Your photos can be immediately improved by substituting a dark, non-reflective background material. The light material is a poor choice as it fools the camera's exposure meter into underexposing the subject.
    "Anything seems possible when you don't know what you're doing."

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