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Thread: Zhumell Tachyon 25x100 !!!!

  1. #11
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    Default Re: Zhumell Tachyon 25x100 !!!!



    No I had a friend who is a sheet metal worker make it up for me , he did it for a box of beer that we both then drunk . Nice .
    Thats probably the only problem with these Bino's and thats light getting directly into the light path wrecking the contrast ( unless you have a very dark site with no lights ) .
    The lense hood makes a big differance thats for sure .
    Thanks for your encouragement , I just cant stop tinkering withs all things telescopes .
    Brian.
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  3. #12
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    Default Re: Zhumell Tachyon 25x100 !!!!

    Thanks Brian!

    The lens hoods protecting the optics from the stray light are very important, and for the backyard astronomers as important as the lens multicoatings, if not even more important, as most of the astronomy budget binoculars have deficient buffling of the tubes interiors, if any at all.

    Attached is a pic of my refractor with an XL DIY lens hood. I am still thinling

    You may ask Gus (admin) to place this thread as a sticky, he is living on the same continent as you.

    Best,

    JG
    Attached Images Attached Images
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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;
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  5. #13
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    Default Re: Zhumell Tachyon 25x100 !!!!

    How do we go about placing this thread as a " sticky " JG ?
    Good idea but I have no idea how to do it , thanks .
    Brian.

  6. #14
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    Default Re: Zhumell Tachyon 25x100 !!!!

    Quote Originally Posted by b .nordstrom View Post
    How do we go about placing this thread as a " sticky " JG ?
    Good idea but I have no idea how to do it , thanks .
    Brian.
    Brian,

    we both can't, but Admin or one of the moderators can decide and do it.
    I'd also include in the 'sticky' the dew shield issues, heating against the dew, etc.

    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: Zhumell Tachyon 25x100 !!!!

    Nice JG ! I need to build a diy lens hood for the 120mm and also mount it on a lighter weight tripod similar to your's, especially with my physical condition with my neck and back. I really like your setup.
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    Cliff in Mo.
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    Default Re: Zhumell Tachyon 25x100 !!!!

    Hello Cliff,

    the weight of the head for the 6incher will be still reduced.
    The lens hood is made of a foam foil covered with a thick paper, practically not adding more weight to the assy.
    The reason is, I must change the observing sites in the backyard garden even during one observing session, and I can allow just for an equipment I can easily grab and carry.

    Best,

    JG
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    Default Re: Zhumell Tachyon 25x100 !!!!

    Hi all,
    I have lost my Zhumell 20x80 Super Giant Astronomical Binoculars (2080A) and am looking to replace possibly with the Tachyons. Has anyone tried any filters to help with chromatic aberrations with bright objects? I have no exp with filters. Also where have you all found the best prices? i am on west coast of NA.
    thanks,
    Clifford

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    Default Re: Zhumell Tachyon 25x100 !!!!

    Quote Originally Posted by Om_Audio View Post
    Hi all,
    I have lost my Zhumell 20x80 Super Giant Astronomical Binoculars (2080A) and am looking to replace possibly with the Tachyons. Has anyone tried any filters to help with chromatic aberrations with bright objects? I have no exp with filters. Also where have you all found the best prices? i am on west coast of NA.
    thanks,
    Clifford
    Hello Clifford,

    you can certainly try some fringe killer or semiAPO filters, but the result will possibly not meet your expectations, as most of the astronomy binoculars are fast achromats (around F/4) with cheap eyepieces.

    The chromatic aberration is quite well corrected on the triplet 20x80 binoculars, Teleskop-Express: 20 x 80 Porro binocular - triplet semi-APO - w/ tripod adapter

    The really good 80mm big binoculars, like the Docter Aspectem Docter Aspectem 80/500 ED 30.5x Standard Binocular-57221 , are far beyond most of the budgets for the binoculars.

    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: Zhumell Tachyon 25x100 !!!!

    congratulations on your new bino's and thank you so much for that enjoyable first light report - the area of the sky you described is a favorite of mine and the double cluster in Perseus is breathtaking - clear skies and look forward to hearing more about your viewings

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    Default Re: Zhumell Tachyon 25x100 !!!!

    Just ordered my pair tonight. Can't wait to try them out!
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