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Re: [tmboptical] Another ATM TMB152

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  • W. Gondella
    Norm, Actually, If I was to do it, I would install a weatherized TMB80 on the roof, controlled by joystick servo, with a motorized zoom going into a CCD
    Message 1 of 32 , Apr 1, 2004
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      Norm,

      Actually, If I was to do it, I would install a weatherized TMB80 on the roof, controlled
      by joystick servo, with a motorized zoom going into a CCD camera. On the dash built into
      it would be a hi-res display monitor. Thus you could see a wide angle view far ahead or
      zoom in on any points of interest, such as police behind billboards or young ladies
      sunbathing on their pool decks nearby the road, as you burn down the highway in your 500+
      horsepower big block chevy (equipped of course with high end stereo in car with Meridian
      CD Player, electrostatic panels in the doors, subwoofer built into seat, all driven by
      fully complementary symmetry MOSFET power amps in the truck) on your way to the
      star-party, of course.

      The TMB80 would have a turrent so that you could switch out the ccd camera for a night
      vision camera. This would allow you to drive with headlights off (stealth mode while
      evading speeding tickets) or as a courtesy to other star gazers as you arrive late at the
      star party.

      Naturally, the 14-inch f/9 TMB would be in *tow* behind in the trailer, as mounting this
      on the car would not only be aerodynamically unstable and cause handling problems at high
      speeds, but would detract somewhat from the appearance of the car. It would raise up out
      of the trailer through motorized roof panels on a hydraulically operated mount, once you
      were pulled safely into your spot at the Nebraska Star Party.

      And who said astronomy couldn't be fun?!

      Wayne E. Gondella
      AFA Engineering, Pittsburgh, Pennsylvania


      ----- Original Message -----
      From: "Norman L. Rubenstein" <nlr@...>
      To: <tmboptical@yahoogroups.com>
      Sent: Thursday, April 01, 2004 2:52 AM
      Subject: Re: [tmboptical] Another ATM TMB152


      > Dear Wayne:
      >
      > I don't know, maybe you and Mike are on to something here -- a group of
      > gnarly, grizzled, nasty-looking (using myself as a model, here)
      > extreme-astronomers in dressed in distressed leather, all with full-color
      > tattoos of the TMB logo proudly displayed on our bulging
      > (biceps/beer-bellies -- choose at least one) and all with Harleys with TMB
      > 80's welded onto the handlebars, all in different colors, customized by Mike
      > -- it might draw in a whole new crowd of "young people" into the hobby and
      > maybe even spawn a bad tv series...
      >
      > NAH! :-)
      >
      > Norm Rubenstein again up past his bed time and delirious
      >
      >
      >
      > On 4/1/04 12:17 AM, "W. Gondella" <strehl985@...> wrote:
      >
      > > That's the idea, Mike! But as in all cases, I recommend that you not try to
      > > use it while
      > > driving (especially with a supercharger). Bring the focus in through the roof
      > > and have
      > > the person in the passenger seat man the optics while the driver keeps his
      > > attention on
      > > the road. We don't want to cause accidents or give astronomers a bad name!
      > > :)
      > >
      > > Wayne E. Gondella
      > > AFA Engineering, Pittsburgh, Pennsylvania
      >
      >
      >
      >
      >
      > Yahoo! Groups Links
      >
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      >
      >
      >
    • Norman L. Rubenstein
      Dear Mike S: Congratulations on a really nice and useful setup of exceptional equipment. You are sure to enjoy them. I m looking forward to your first light
      Message 32 of 32 , May 10 4:05 PM
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        Dear Mike S:

        Congratulations on a really nice and useful setup of exceptional equipment.
        You are sure to enjoy them. I'm looking forward to your "first light"
        report, and a few images from that ST10XME!

        Best regards,

        Norm Rubenstein


        On 5/10/04 3:36 PM, "Michael Sherick" <michaelsherick@...> wrote:

        > Hello Mike,
        >
        > Thanks for your response. I appreciate your detailed comments. Based on your
        > comments, I will most likely plan a 3 baffle system about .125" outside the
        > light cone that disallows visual contact with the tube walls from the focuser
        > end.
        >
        > I'm planning on using a fiberglass tube (Parks Optical) that has a 7" ID, with
        > flanges for support of the 152mm lens cell and 3.5" FeatherTouch focuser
        > components. My OTA will be specifically built for CCD imaging wit a ST10XME,
        > riding on a MI-250 mount. I'm hoping that the baffling will help to improve
        > image contrast.
        >
        > When all is complete, I hope to have a OTA as nice looking as the one you
        > made.
        >
        > Best Regards,
        > Mike Sherick
        > ------------------------------------------------------------------
        >
        > Mike C <mike@...> wrote:
        >
        >
        >> Mike C.
        >>
        >> Can you tell me how you placed the light baffles in yur 152 design?
        >> I have a similar project coming up. Thanks.
        >>
        >> Regards,
        >> Mike Sherick
        >
        >
        > Hi Mike
        >
        > Sorry, just about missed this message. I ran without baffles in both my
        > TMB152 tubes. They are flocked and I had no problems with stray light.
        >
        > For comparative reference, Televue scopes are unbaffled, and Astro-
        > Physics scopes just have baffles cut into the tube walls. Nothing is "tight"
        > to the light cone, yet the AP scopes still win all the "ultimate comparo"
        > on scopereviews.com when put up against super baffled Takahashi
        > FCT150. Simply, it must be the lens forming the image, not the baffles,
        > as Roland does point out. How important are baffles? Is there a lot of
        > stray light around the objects you observe?
        >
        > I did have two plans for baffling, but I spent all my astronomy time
        > observing with the TMB152 once it was completed. Plan #1 was master
        > craftsman Chuck Fellows, who would construct a lightweight baffling
        > "frame" much like the baffling frame in real TMB tubes, plan #2 was to
        > have the baffles laser cut by www.pololu.com , very affordable and
        > obviously dead precise. They just need a DXF file and they're ready.
        >
        > If you haven't selected a tube diameter yet, keep in mind the bigger your
        > tube is, the less baffles you will need to hide the tube walls.
        >
        > And don't baffle right up to your light cone in any case. They're not
        > optical field stops, they're baffles, they are not meant to perform any
        > function except to hide the inside walls of the refractor from sight.
        >
        > Best Regards
        > Mike C
        >
        >
        >
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