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Thread: Carl Zeiss E-Pl 10x/20 #44 42 31 aspheric eyepiece

  1. #1
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    Default Carl Zeiss E-Pl 10x/20 #44 42 31 aspheric eyepiece



    Hello all,

    this extra planar E-Pl eyepiece with the “true” glass asphere has found its astronomy friends in Germany, later in the U.S., and finally among the collectors in Japan.

    The sample, recently added to my collection, is in a used, but fairly well preserved condition

    Carl Zeiss E Pl 44 42 31.jpg

    Specifications
    Optics: f = 25 mm, AFOV = 40°, long eye relief for glass wearers, flat corrected field,
    3 lenses in the (2 – 1) groups: the eye lens is double convex and aspherical, the cemented doublet is planar towards the eye lens and convex towards the field stop
    multicoatings amber and pale green
    Body: black plastic with micro rills inside to prevent light reflections
    Dimensions: diameter 36.5 mm/30 mm, total length 54.5 mm
    Weight (without the eyeguards): 61.3 g

    The lenses in the eyepiece can be easily taken out and cleaned

    Carl Zeiss E Pl 44 42 31 dissected.jpg

    As the picture reveals, this eyepiece lenses assembly can be easily dissected, if compared with the much more sophisticated inner mechanics and the lens mounts in the Leica eyepieces of that time.

    Remarkable is the minimalist design with just 3 lenses, but achieving a top performance in transmitted light and contrast.
    Unlike the Leitz/Leica designs of that time, these Carl Zeiss E-Pl eyepieces, designed for the STEMI achromatic stereo microscopes, don't correct the chromatic aberrations.

    This Carl Zeiss design manufactured in Germany has been later discontinued and replaced with the Carl Zeiss eyepieces outsourced to manufacturing in China. Those other eyepieces can be recognized according to the changed item numbers as printed on the eyepiece bodies.

    Thanks for reading,

    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; DOCTER UWA; 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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    Default Re: Carl Zeiss E-Pl 10x/20 #44 42 31 aspheric eyepiece

    John.

    Thank you for good information.

    Clear skies.
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    Default Re: Carl Zeiss E-Pl 10x/20 #44 42 31 aspheric eyepiece

    The double convex eye lens has only one aspherical surface, correct?
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    Default Re: Carl Zeiss E-Pl 10x/20 #44 42 31 aspheric eyepiece

    Quote Originally Posted by not_Fritz_Argelander View Post
    The double convex eye lens has only one aspherical surface, correct?
    Hello not_Fritz,

    that's my guess.
    But I don't have a gauge to check it, just my guess when holding the lens with my fingers and looking with my eyes.
    Best,

    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; DOCTER UWA; 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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    Default Re: Carl Zeiss E-Pl 10x/20 #44 42 31 aspheric eyepiece

    Thanks, that's good enough for me.
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    Default Re: Carl Zeiss E-Pl 10x/20 #44 42 31 aspheric eyepiece

    Hello not_Fritz,

    the closest eyepiece to the Carl Zeiss E-Pl #44 42 31 may be the Leica HC Plan #507802,

    Leica HC Plan 507802.jpg

    which looks to me like the (field stop - 2 - 1) optics, but I can't dissect it without tools. The body is metal, not plastic.

    The lenses in the Leica are thinner with less surface curvature, and the 2nd lens in the 1st group looks according to its very faint scattered laser trace like one of the Leitz/Leica proprietary fluoride glasses.

    This pair of the eyepieces is at the moment sitting on my STEMI microscope, and admitted, to my highest satisfaction.

    Best,

    JG

    PS: The other eyepiece, the Leica HC Plan S #507807 is an intrafocal CA correcting eyepiece, a remake of the Leitz Periplan design.
    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; DOCTER UWA; 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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    Default Re: Carl Zeiss E-Pl 10x/20 #44 42 31 aspheric eyepiece

    Re: Carl Zeiss E-Pl eyepieces prices

    Hello all,

    the 2nd hand prices for these eyepieces can be seen in a wide range, depending where and from whom you buy them.
    I have paid for my sample 49 EUR from a dealer in Austria.
    On the European-wide markets the prices are typically around 150 EUR, and sometimes less, like 130 EUR at the micro-crystal dealer in Spain, https://www.ebay.de/itm/Carl-Zeiss-M...cAAOSwealacJd1

    The photo version S-Pl of this eyepiece has achieved the highest bid close to 220 EUR, as I have seen in December/January.

    Anything above these prices sounds like a hype, though.

    Most of the Carl Zeiss E-Pl eyepieces, as offered at the moment, come from the Zeiss outsourced manufacturing to China. Fair offers show a pic of the box or wrap indicating the country of origin.
    The German eyepiece boxes have the "passed" stamp like "Z-Prüf".

    Best,

    JG
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    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; DOCTER UWA; 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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    Default Re: Carl Zeiss E-Pl 10x/20 #44 42 31 aspheric eyepiece

    Hello all,

    here is a price hit on the wide version of the Carl Zeiss E-Pl from 'micro-crystal' in Spain offered for 1,149.94 EUR,

    https://www.ebay.de/itm/Carl-Zeiss-G...YAAOSw8W5afaAE

    It looks like, there are no limits,

    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; DOCTER UWA; 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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    Default Re: Carl Zeiss E-Pl 10x/20 #44 42 31 aspheric eyepiece

    Quote Originally Posted by j.gardavsky View Post
    Hello all,

    here is a price hit on the wide version of the Carl Zeiss E-Pl from 'micro-crystal' in Spain offered for 1,149.94 EUR,

    https://www.ebay.de/itm/Carl-Zeiss-G...YAAOSw8W5afaAE

    It looks like, there are no limits,

    JG
    Breathtaking!
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    Default Re: Carl Zeiss E-Pl 10x/20 #44 42 31 aspheric eyepiece

    Hello all,

    here is a link to the Carl Zeiss E-Pl versus the Leica HC PLAN S eyepiece shootout,
    http://www.astronomyforum.net/astron...post1058665190

    Best,

    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; DOCTER UWA; 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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