My first telescope

By Stars & Astronomy On July 31st, 2010

I have finished construction of my telescope and it is first time I have grinded the prime mirror. It is a 10″ F:4.6 Dobson-telescope. If you like to know more then see my website: www.aigis.dk

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Posted in Telescopes |

23 Responses to “My first telescope”

  1. skyleme, on July 31st, 2010 at 1:20 pm Said:

    very great !!!

  2. gedask98k, on July 31st, 2010 at 2:15 pm Said:

    very nice very good job

  3. saddie15, on July 31st, 2010 at 3:03 pm Said:

    ke5492,

    i have respect for your telescope,
    really nice job man,

    but can you tell me,
    what i need to grind a mirror for telescope

    i have no idea how to grind,

    and what i need,

    can you plz tell me the name’s of the stuff that i need?????????? plz?

    bye byee.,.

  4. sonzbroz, on July 31st, 2010 at 3:38 pm Said:

    wow good job

  5. cplwkong, on July 31st, 2010 at 4:08 pm Said:

    Great job! Always great to see a home-made scope.

  6. 4EyedLabGeek1, on July 31st, 2010 at 4:10 pm Said:

    Is anyone having trouble seeing anything through their telescopes these days? How’s your visibility?

  7. ke5492, on July 31st, 2010 at 4:58 pm Said:

    It is first time I tried to grind a mirror, but the next mirror will be 16″ at least ;-)

  8. ke5492, on July 31st, 2010 at 5:57 pm Said:

    Thank for your comment. Next time my miror have to be aluminized I will try to polish as you recomend.

  9. ke5492, on July 31st, 2010 at 6:41 pm Said:

    yes I’m from Denmark.

    Hvorfra i Danmark kommer du?

  10. yallehrup, on July 31st, 2010 at 7:31 pm Said:

    Are you from Danmark :) det jeg :P

  11. ke5492, on July 31st, 2010 at 7:52 pm Said:

    To joshig1983 – it is hard to do, but I am trying to parabolizing the miror because it is f:4,5. I think I have to try one more time.

    Tricyklist recomend me to grind with the tool on top. I think he is right.

  12. Tricyklist, on July 31st, 2010 at 8:00 pm Said:

    The reason your mirror did not polish right out to the edge is because your lap facets did not reach the edge of the tool. Working with tool regularly on top would have helped to polish the mirror to the very edge. The mirror will still work very well with only a small lost of contrast if the figure is okay. Enjoy your telescope and your superb dome.

  13. joshig1983, on July 31st, 2010 at 8:50 pm Said:

    If you are using a Newtonian optical system, the mirror is supposed to be parabolic in shape. If you use a really long focal ratio like over f/8, you can get away with a spherical shape without too much loss of resolution due to spherical aberation. If you didn’t make a telescope before, it takes some handy work. Start with buying all the parts premade. If you really want to make the mirror, it helps to have a scope ready as a test bed for your new mirror.

  14. Anvilcjl, on July 31st, 2010 at 9:04 pm Said:

    Peshmarga, the mirror is curved. the larger the mirror, the harder it is to get it curved perfectly. It’s quite a project and you’d really have to know what you’re doing.

  15. morocco214, on July 31st, 2010 at 9:36 pm Said:

    the mirror for the telescope is a special and it is hard too make a one the mirror in the ke6492 telescope it is from a telescope you have to buy a telescope

  16. peshmarga19, on July 31st, 2010 at 9:36 pm Said:

    hey ke6492 can i ask

    how do you haved make the mirror for the telescope?
    is that a special mirror or a normal?

    im trying to make one n my own
    but i just need a mirrori hope i get an answer back soon

    greetings

  17. mijnvideos, on July 31st, 2010 at 10:07 pm Said:

    Great looking scope , well done .

  18. klaus5492, on July 31st, 2010 at 10:28 pm Said:

    Thanks to Francis for your comment, I have seen some of your videos on youtube, they are very great and I will recomend them if anybody planed to make their own mirror.

    Thanks to fnherstalpatriot and bankeh for yours comments too.

  19. klaus5492, on July 31st, 2010 at 11:23 pm Said:

    This is a test post-video

  20. foreilly1958, on July 31st, 2010 at 11:26 pm Said:

    This is a great video. Your workmanship is excellent. The ring around the edge of the mirror is due to insuffucuent polishing. Thank you for sharing this video.

    Francis J. O’Reilly

  21. fnherstalpatriot, on July 31st, 2010 at 11:41 pm Said:

    Nice.

  22. bankeh, on August 1st, 2010 at 12:01 am Said:

    Id be mighty proud for makign this, and even adapting to the issue you had with the primary. Hopin to build one next summer, but have to think it all out

  23. ke5492, on August 1st, 2010 at 12:56 am Said:

    It is okay video – but image-quality can be better.

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