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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
    Binoculars: Leica Ultravid 7x42, 8x42HD; Swarovski EL 8.5x42 Swarovision; Nikon 10x70 Astroluxe; Docter Nobilem 7x50 Porro; Jenoptem 7x50W, 10x50W; BA8: 10.5x70, 15x85; 25x100FB, AsahiPentax 8x40, Refractors: Sky-Watcher 150mm/750mm; Leica APO Televid 82mm (25x-50x WW ASPH); EPs:Baader Classic Orthos; Fujiyama ortho, Leica B WW, ultrawide zoom ASPH, Periplan GF, HC Plan S, L; Wild UW mil; Tele Vue Delos, Nagler Zoom, Plössls; Swarovski SW; Pentax XW; ZEISS diascope B WW T*, Carl Zeiss E-Pl; Hensoldt mil; Filters: Astrodon, Astronomik, Baader (CCD), TS; Astrophotography: AstroTrac; Leica R7: Leica 2/50, 2/90mm, 2.8/180mm lenses
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    Bigzmey (11-01-2017),bladekeeper (11-01-2017),Gabby76 (10-31-2017),not_Fritz_Argelander (11-11-2017),ProfEclipse (11-01-2017),Trombatissimo (11-05-2017)

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    Default Re: The Astroplan eyepiece: Backgrounds

    Fascinating, thanks for sharing JG!
    j.gardavsky likes this.
    Scopes: Celestron: 8" SCT F10, Omni 150R Achro F5, Onyx 80ED F6.3; ES: 127mm CF F7.5 APO. Mounts: ES Twilight I, Bresser EXOS2, SW SkyTee2, UA MicroStar. Binos: Orion 10x50, Celestron 8x42. EPs: TeleVue: Delites, Plossls & barlows; ES: 82os & 68os; Vixen: SLVs, LVW & NPLs; Baader: BCOs & Aspherics; Meade: UWAs & Plossls; Celestron: X-Cel LXs, Luminos. Filters: Astronomik: UHC; Lumicon: OIII, H-beta, DeepSky; Baader: UHC-S, M&SG, CB; Orion: UltraBlock, SG. DSO tally: 1085 (H400-1: 400, H400-2: 225, H300-3: 73; M110: 110, S110: 73). Doubles: 625, Comets: 8, Asteroids: 42
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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.
    Past items italicized. Scopes: Refractors: Orion ST80 (mods for white light solar), SV ED80 f7, Orion and SW 80 and 120 ED, Orion ED80T, Orion 120 f8.3, Tasco 30x30, Edmund 40; Newtonians: Z12 f5, self made 6” f9, AT 8”f4, OC 8”f6.3, Orion 10" f4.7, Orion XX14i; Catadioptrics: VMC110L, Intes MK66, Orion 102 MakCas f12.7, Celestron 9.25 SCT and 9.25 Edge. EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, TV Nagler, ES100s, Edmund Orthoscopics, Baader Hyperions. Mounts: Orion Sirius EQG, Star Seeker III, Celestron CG5, Vixen Porta II, Orion Atlas, Losmandy G11

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    Default Re: The Astroplan eyepiece: Backgrounds

    Very interesting. Thanks for sharing :-)
    j.gardavsky likes this.
    Telescope: Bresser Messier AR152L f/7.9, Altair Starwave 102 f/11

    Mounts: Bresser manual EXOS-2, Giro Ercole alt-az, Berlebach Planet tripod

    Binoculars Zeiss Terra ED 8x42, Bresser Condor 10x24

 

 

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