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Thread: New Orthos

  1. #1
    Johann von Hesse's Avatar
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    Default New Orthos



    I got my new planetary Orthoscopic eyepieces to use in my binoviewer. I ended up having Siebert Optics make me a set of 9.9mm and 12.4mm.

    I had posted a review on the Siebert Optics Orthoscopic series 9.9mm and 12.4mm about a month ago. I liked the contrast and the on-axis and off-axis sharpness so much over my UO and Zeiss Orthos, I put an order in.
    These orthos have a 60 degree afov and ER of 16mm throughout the whole series. I made a wood box to place them in.
    I've also posted a pic of the two binoviewers ( Zeiss and Siebert binoviewers) I use for observing the planets.
    Attached Images Attached Images
    RCP Observatory
    A Veteran of the Binoviewer Wars (2001-2003)
    10" f/10 LX200GPS
    6" f/6.5 / 5" f/6.5 / 4" f/6.5 Refractors
    6" f/9 Refractor / 8" f/9 Refractor
    Eyepieces: Zeiss / Olympus / UO Konig / TeleVue / Siebert Optics Ortho's & Observatory 2"

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  3. #2
    LeFanch's Avatar
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    Default

    Thanks for sharing!

    I am going to have to google some of that, though, as I am not (at all) familiar with orthoscopic equipment...
    LeFanch
    Pentax K-5, K10D, O-GPS1 and a few lenses.

  4. #3
    j.gardavsky's Avatar
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    Default

    Hello Johann,

    do you put orders directly to Siebert Optics, or do they have dealers? I'd try something around 12mm, 8mm and 5mm, those citical to quality focus lengths. Rearding the light transmission, how do they rate against the mass of generally good EPs, like Pentax XF?

    Thanks for sharing your experience

    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

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

    do you put orders directly to Siebert Optics, or do they have dealers? I'd try something around 12mm, 8mm and 5mm, those citical to quality focus lengths. Rearding the light transmission, how do they rate against the mass of generally good EPs, like Pentax XF?

    Thanks for sharing your experience

    JG
    I put my order in directly to Siebert Optics, I do not know if they have dealers that sell their optics.

    As for light transmission. The Siebert orthos were brighter and had better contrast then the TeleVue Plossls, Radians, and my favorite Zeiss orthos. The Siebert orthos also had better neutral color then the Radians. The on-axis sharpness was also better with the Siebert orthos.

    What I look for in an eyepiece for doing serious observing of the planets are the following :
    1) Great on-axis sharpness ( I judge all eyepiece for sharpness against my Zeiss Orthos)
    2) Outstanding contrast
    3) No ghosting
    4) Must not show a color cast induced by the eyepiece (TeleVue's Radians give a yellowish cast to the image)

    The Siebert Orthos passed my test. But, everyones eyes are different, and what looks good to me might not look the same to others.
    RCP Observatory
    A Veteran of the Binoviewer Wars (2001-2003)
    10" f/10 LX200GPS
    6" f/6.5 / 5" f/6.5 / 4" f/6.5 Refractors
    6" f/9 Refractor / 8" f/9 Refractor
    Eyepieces: Zeiss / Olympus / UO Konig / TeleVue / Siebert Optics Ortho's & Observatory 2"

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    Default

    Thanks Johann,

    I'll check my budget,

    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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    Quote Originally Posted by j.gardavsky View Post
    Thanks Johann,

    I'll check my budget,

    JG
    All my scopes have a slow f ratio. But, Sieberts website states that the orthos will work good starting at f/3.3
    If the weather is good this weekend, I will have a chance to try them in a Parks 16" f/4, I will send you a PM to let you know how they work out.
    RCP Observatory
    A Veteran of the Binoviewer Wars (2001-2003)
    10" f/10 LX200GPS
    6" f/6.5 / 5" f/6.5 / 4" f/6.5 Refractors
    6" f/9 Refractor / 8" f/9 Refractor
    Eyepieces: Zeiss / Olympus / UO Konig / TeleVue / Siebert Optics Ortho's & Observatory 2"

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    Default

    Hello Johann,

    I'd use the orthos on my f/5 SkyWatcher achro, and later on a future fast DOB, I'll have on some day.

    Your rating of Siebert is very important for me, as there have been also other reviews, like,

    9.9mm Siebert Star Splitter Orthoscopic comparison test

    Looking forward to your observational report

    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

    Quote Originally Posted by Johann von Hesse View Post
    All my scopes have a slow f ratio. But, Sieberts website states that the orthos will work good starting at f/3.3
    If the weather is good this weekend, I will have a chance to try them in a Parks 16" f/4, I will send you a PM to let you know how they work out.
    No objection to the PM to him, but could you also post it here so that the rest of us know how well those work in an F/4?

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

    I'd use the orthos on my f/5 SkyWatcher achro, and later on a future fast DOB, I'll have on some day.

    Your rating of Siebert is very important for me, as there have been also other reviews, like,

    9.9mm Siebert Star Splitter Orthoscopic comparison test

    Looking forward to your observational report



    JG

    I never remember Siebert Optics Orthos looking like the photo in that review from 2006. Here is a review from the same year.

    Astromart Reviews - First Impressions of the Siebert 5.9mm StarSplitter Modified Ortho

    The new line up uses high index glass and a lot better coatings. The build of the eyepiece is solid. You realy can not go by the older reviews any more on Siebert Optics eyepieces. After Harry Siebert invented the 2" binoviewer, his business took off in a big way. He had Mt. Wilson Observatory call him to build them a 4" 80mm eyepiece to be used in their 60" Cass. He also designed the 70mm 4.3" eyepiece for the Carnegie Institution of Washington in 2010 for their 6.5 meter or ( 234") Magellan.

    The first pic is of the Mt. Wilson 60" Cass with an astronomer looking through the Siebert 4" 80mm eyepiece. This is an observation report using the Siebert 4" eyepiece.

    Object Observed:
    Double Double: Could drive a truck through the close doubles, the resolution was so good!

    Picture #2 is of the 4" 80mm eyepiece.
    Picture #3 is the 70mm 4.3" eyepiece.
    Looks like Siebert Optics do anodize their eyepieces. I will be getting a set of 12mm Monocentrics for testing. I will ask if they will anodize them.
    Attached Images Attached Images
    RCP Observatory
    A Veteran of the Binoviewer Wars (2001-2003)
    10" f/10 LX200GPS
    6" f/6.5 / 5" f/6.5 / 4" f/6.5 Refractors
    6" f/9 Refractor / 8" f/9 Refractor
    Eyepieces: Zeiss / Olympus / UO Konig / TeleVue / Siebert Optics Ortho's & Observatory 2"

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    Default

    Quote Originally Posted by OleCuss View Post
    No objection to the PM to him, but could you also post it here so that the rest of us know how well those work in an F/4?
    Yes, I will post it here in open forum.
    RCP Observatory
    A Veteran of the Binoviewer Wars (2001-2003)
    10" f/10 LX200GPS
    6" f/6.5 / 5" f/6.5 / 4" f/6.5 Refractors
    6" f/9 Refractor / 8" f/9 Refractor
    Eyepieces: Zeiss / Olympus / UO Konig / TeleVue / Siebert Optics Ortho's & Observatory 2"

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