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Thread: Evolution of DIY Finders (part II)

  1. #1
    kanadalainen's Avatar
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    Default Evolution of DIY Finders (part II)



    I have scrounged together some decent objectives from my broken set of Pentax binoculars (35 mm - small but great optics) and another cheaper set (late 60's Taymor 50mm).

    After toying with Barlow tubes, rubber stoppers, and plumbing fixtures, here are a couple of results:



    35 mm Pentax objective with 1.5" ABS pipe, slightly larger expansion joint fitting as a dew shield, and #8 rubber stopper with hole drilled for the .965" diagonal, crosshairs Kellner. Maybe 6 or 7X mag.

    FIrst light happened last night while sighting in M42 and M43. It does the trick - focus set to infinity.



    35 mm Pentax



    35 mm Pentax objective.



    The big boy, a 50 mm objective with various plumbing fittings.



    Component breakdown of the 50 mm. The diagonal and EP are recycled from the 35 mm scope.

    Now I must decide which one to use, and am leaning toward the 35 mm..

    Ian
    Ian
    Scopes Celestron - Vixen 80 f11.3 on a Vixen alt/az mount and an Orion dob XT10i f4.7
    Binoculars Asahi Pentax 7x35 and 7x50, Beck Kassel 8x30 and Celestron 15x70 Camera Nikon D90 with Rokinon 10mm
    Eyepieces: Leitz Periplan GF, ES68s, ES82s, TV Naglers, Meade 4000 super plossl, Nikon CFI, Olympus FK, Paracorr I, Abbe Orthos: Carl Zeiss Jena K7x (35mm), K10x (25mm)
    M110: 110 Herschel 400: 90 Comets: 2 Planets: 6

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  3. #2
    Gabby76's Avatar
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    Default Re: Evolution of DIY Finders (part II)

    Great re-purpose Ian! I like it
    kanadalainen likes this.
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
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    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite Eyepieces: A-Z

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    The weakest link in the optical chain is the large nut located directly behind the
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    / camera. - Gabrielle

    Ya gotta keep this Apo/
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    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

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  4. #3
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    Default Re: Evolution of DIY Finders (part II)

    Hello Ian,

    everything looks very clean, and made the right way.
    Thank you for sharing,

    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;
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    Default Re: Evolution of DIY Finders (part II)

    Nice Ian. Looks very good.

    If to be used on your XT10i, I'd suggest you go for the 50mm. It will come in useful when looking for fainter objects.

    Joe
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    40 years in amateur astronomy - 1978-2018
    Astronomical interests : astrophotography, visual observing, night-scapes, solar eclipse chasing, asteroidal occultations
    Bortle 1-2 skies, 149 E, 35 S
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    Default Re: Evolution of DIY Finders (part II)

    Quote Originally Posted by ozeclipse View Post
    Nice Ian. Looks very good.

    If to be used on your XT10i, I'd suggest you go for the 50mm. It will come in useful when looking for fainter objects.

    Joe

    Thanks Joe
    The 35 will go on the Tasco 11TR and the 50 will go on my as yet unbuilt big DIY dob.
    Ian
    Ian
    Scopes Celestron - Vixen 80 f11.3 on a Vixen alt/az mount and an Orion dob XT10i f4.7
    Binoculars Asahi Pentax 7x35 and 7x50, Beck Kassel 8x30 and Celestron 15x70 Camera Nikon D90 with Rokinon 10mm
    Eyepieces: Leitz Periplan GF, ES68s, ES82s, TV Naglers, Meade 4000 super plossl, Nikon CFI, Olympus FK, Paracorr I, Abbe Orthos: Carl Zeiss Jena K7x (35mm), K10x (25mm)
    M110: 110 Herschel 400: 90 Comets: 2 Planets: 6

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    Default Re: Evolution of DIY Finders (part II)

    I think I have used more plastic plumbing parts for ATM use than for actual plumbing!!

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    Default Re: Evolution of DIY Finders (part II)

    Quote Originally Posted by Zygmo View Post
    I think I have used more plastic plumbing parts for ATM use than for actual plumbing!!



    Its funny because its true.
    Ian
    Scopes Celestron - Vixen 80 f11.3 on a Vixen alt/az mount and an Orion dob XT10i f4.7
    Binoculars Asahi Pentax 7x35 and 7x50, Beck Kassel 8x30 and Celestron 15x70 Camera Nikon D90 with Rokinon 10mm
    Eyepieces: Leitz Periplan GF, ES68s, ES82s, TV Naglers, Meade 4000 super plossl, Nikon CFI, Olympus FK, Paracorr I, Abbe Orthos: Carl Zeiss Jena K7x (35mm), K10x (25mm)
    M110: 110 Herschel 400: 90 Comets: 2 Planets: 6

 

 

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