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    Re: Star finder, 2102-D, further modification
    From: Frank Reed
    Date: 2010 Nov 11, 20:43 -0800

    Greg, you wrote:
    "Please post an image of your modified planisphere/ 2102-D."

    Ok. It took me about fifteen minutes to make, print to scale, cut and attach the overlays. It took about forty-five minutes to get my lame camera to focus properly on the gloss surface. Even then, the pictures are mediocre. Sorry.

    By the way, I mentioned I used Brad Morris's spreadsheet to make the overlays. If anyone else wants to do that, you can push the stars off to the edge of the drawing area by changing the declinations of the 57 stars to 90 South.

    It says 30-40 North latitude on the face of this specific planisphere, but it's really made for 32 degrees. If you want to use this particular product for different latitudes, you would have to cut away the horizon masks. Not difficult, but more surgery than I'm willing to do just "for fun".

    You added:
    "Break out a stop watch and time your creation against the phone app. ;-)"

    There's definitely a setup where the analog computer (the star finder) will win. Compared to a desktop computer running similar software (which, after all, was the only competition as little as two years ago), the ordinary planisphere will win on speed if it's close at hand --it "boots up" faster. :-)

    -FER

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