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Thread: Link to transmission in eyepieces.

  1. #1
    John Baars's Avatar
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    Default Link to transmission in eyepieces.



    I don't know if this list of transmission in eyepieces has been shown here before on this specific forum. Anyway; just to be sure:

    A m a t e u r a s t r o n o m i e . c o m/T i p s

    500 Nm comes closest to our night-vision (510).
    550 Nm comes closest to daylight-vision.
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  3. #2
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    Default Re: Link to transmission in eyepieces.

    Hello John,

    and thanks for the link.
    This link is a compilation by Mark Ludes, I have somehow lost the link to the more comprehensive Greek Forum original.

    Best,

    JG
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    Default Re: Link to transmission in eyepieces.

    Hello all,

    I have finally found a Microssoft Word copy of the transmissivity survey of eyepieces, as measured by Konrad Horn Optical, and a part of which has been later compiled by Mark Ludes,
    https://www.google.com/url?sa=t&rct=...aE8r94NhWRkn7Z
    The second group of the tables shows the measurement results for the blue/violet wavelengths down to the ultraviolet 350nm.

    The transmissivity values in the Mark Ludes' compilation begin at 450nm.

    The eyepiece transmissivity is critical in the spectral range 500nm down to 434nm (OIII doublet through H-Beta down to H-Gamma) not only for the nebulae, but also for the galaxies.

    Here is also a link to the Pentax XW transmissivities, Pentax+ / smc PENTAX XO smc PENTAX XW

    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;
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    Default Re: Link to transmission in eyepieces.

    Thanks, more good data is always better.

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    Default Re: Link to transmission in eyepieces.

    Thanks John and JG!
    j.gardavsky and John Baars like this.
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