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Thread: The Astroplan eyepiece: Backgrounds

  1. #1
    j.gardavsky's Avatar
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    Default The Astroplan eyepiece: Backgrounds



    Hello all,

    in one of our local web pages 'Astronomie in Köln" I came across the historical backgrounds of the legendary Astroplan of Leitz (Wetzlar, Germany).
    Contrary to the widespread opinion as heated by the vendors, this Leitz eyepiece has been designed for the artillery equipment of the Leopard II tank:
    run a translator on Okular Test Vergleich und Beschreibung
    A similar design has been also made by Wild in Heerbrugg in Switzerland.

    Enjoy the interesting read,

    JG
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    Default Re: The Astroplan eyepiece: Backgrounds

    Fascinating, thanks for sharing JG!
    j.gardavsky likes this.

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    Default Re: The Astroplan eyepiece: Backgrounds

    Kasai made a line of astoplan eyepieces, 5 element like the super plossls of old. They came in housings identical to the celestron ultimas 5 element.
    Think everyone thought they were just overpriced ultima remakes. I bought the 5mm as it was the only one to give planetary powers in my 1200mm
    focal length scopes of 240x. And WOW, it was so much better than the 5mm ultima, which I thought was pretty good. Right up there with Brandons, which are a half step below the Pentax XW-Delos-Delite benchmarks for planetary viewing. Agena Astro was the only one selling them, think they are all gone now.
    Newtman but some refractors allowed.

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    Default Re: The Astroplan eyepiece: Backgrounds

    Quote Originally Posted by tomjones View Post
    Kasai made a line of astoplan eyepieces, 5 element like the super plossls of old. They came in housings identical to the celestron ultimas 5 element.
    Think everyone thought they were just overpriced ultima remakes. I bought the 5mm as it was the only one to give planetary powers in my 1200mm
    focal length scopes of 240x. And WOW, it was so much better than the 5mm ultima, which I thought was pretty good. Right up there with Brandons, which are a half step below the Pentax XW-Delos-Delite benchmarks for planetary viewing. Agena Astro was the only one selling them, think they are all gone now.
    Several vendors made clones of the Zeiss Astroplanax which is a very different design from the Leitz Astroplan. It is the Zeiss design that was copied by Celestron, Meade, Orion (Ultrascopics), Parks (Gold), and Takahashi. A factory in Japan that was lost in the Fukushima disaster is the reason for discontinued production.

    Delos are nice. I have a few. But the KK Fujiyama Orthoscopics are a bit better even in my Newtonian.
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    Default Re: The Astroplan eyepiece: Backgrounds

    Very interesting. Thanks for sharing :-)
    j.gardavsky likes this.
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