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  1. #1
    Johann von Hesse's Avatar
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    Default Battle of the Orthos



    This is a short report on my findings of the following eyepiece testing.

    As I always like to state, do not take eyepiece reviews as the final answer. Everyones eyes are different, and what might look sharp to one viewers eye may not look as sharp to another. Eyepiece reviews are very subjective. Its best to do the testing of an eyepiece on your own.

    Optical Test
    Eyepieces



    Scope : 6” f/8 & 6" f/9 Type : Refractor

    Manufacture : 6" f/8 Celestron & 6" f/9 ED Meade

    Eyepieces : 9.9mm Siebert Optics, 10mm UO and 10mm Zeiss. A TeleVue 2x Barlow was used for viewing Jupiter.

    Eyepiece design : Modified Orthoscopic

    Number of Elements : 5 / 60*

    Eyepiece Manufacture : Siebert Optics

    Multi coated : [ ]

    Fully multi coated : [ X ]

    Test Object : Jupiter

    The following is the testing results on the Siebert Optics 9.9mm Orthoscopic eyepiece. The eyepiece I had for testing is an optics redesign of the series.

    The eyepiece I tested has a very solid build, and the housing that holds the optics is constructed of machined aluminum. The optical elements are fully multi coated, and have a nice deep blue color. The inside of the housing that holds the optics is deep black and very well baffled. I do like the very smooth rubber twist up eyecup. I also had no problem with threading on filters. Over all, the eyepiece is very solid and well constructed.

    I was testing the Siebert Optics 9.9mm Ortho, along side the University Optics 10mm Ortho, and a Zeiss 10mm Ortho.

    Testing :

    It is a little unfair to include ER and AFOV, as the Siebert takes this hands down. My main goal was to check the Siebert Optics Ortho for ghosting, on axis and off-axis sharpness, and its contrast against the UO and Zeiss Ortho eyepieces.

    On axis sharpness :
    I could see more fine detail on Jupiter with the Siebert Optics Ortho, than I could with the University Optics Ortho. and the Zeiss Ortho.

    Off-axis sharpness :

    I tested the off-axis sharpness by letting the scope drift through the Double Cluster in Cass. The Siebert Ortho was sharp right out to the edge. The University Ortho was sharp out to the last 5%. The Zeiss Ortho I have has always had great edge sharpness. So the Siebert Ortho matched the Zeiss with off-axis sharpness.

    Contrast :

    The reason I feel that the Siebert Ortho was pulling out more detail on Jupiter than the Zeiss. Was do to the noticeable contrast gain it had over the Zeiss. To say I was surprised would be an understatement.

    Ghosting :

    To check for ghosting, I let Jupiter drift into view. The University Ortho would throw up a ghost image of Jupiter each time I let Jupiter drift into view. The Siebert and Zeiss Orthos, did not throw up a ghost image of Jupiter at all. To me, eyepieces designed for planetary viewing should not ghost at all. So the University Optics Ortho failed this test.

    Concultion :

    I think Siebert Optics has a winner with their optical redesigned Orthoscopic eyepiece series. I liked the views that this eyepiece was putting up so much. That I’m going to buy two sets (the 9.9mm and the 12.4mm) to use with my binoviewer for planetary observing.
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    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
    Astro-Baby's Avatar
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    Default

    Wow - I never saw a website that needed some serious rethinging as much as Sieberts - its dreadful.

    Sorry their eyepieces may be great but their sales would be helped a ton by a decent website. Theirs looks like it was done by some primary school kids suffering from color blindness.
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  5. #3
    Johann von Hesse's Avatar
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    Default

    Quote Originally Posted by Astro-Baby View Post
    Wow - I never saw a website that needed some serious rethinging as much as Sieberts - its dreadful.

    Sorry their eyepieces may be great but their sales would be helped a ton by a decent website. Theirs looks like it was done by some primary school kids suffering from color blindness.
    There is no need to tell me sorry. I just do testing for Optics markers when they ask me to. I've been doing it for over 20yrs. I just thought I would post up what I thought of the eyepiece. If my post sounds like an advertisement for Siebert Optics, than I have no problem of it being removed.
    I do agree that a nicely designed website does help in selling your goods for sale.
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  6. #4
    WWPierre's Avatar
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    Default

    Harry Siebert made my best EP, a 30mm Ultra. I went to see his place in rural North Carolina using Google Earth. I'm pretty sure he makes his products in the shop in his back yard. I think he may work alone.

    I think he probably did his own website in house, perhaps using a template. It's a bit hokey, alright, but I had no trouble finding the info I wanted. There was no quick turn-around when I did business with him. I conclude he is as busy as he wants to be, and the website works well for his purpose.

    As a web designer, Harry is a talented optical engineer and technician.

    Thank you Johann, for the EP comparison.
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  8. #5
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    Default

    Yes - sorry to sound negative - it wasnt meant to be but I would hate to see a great optics maker suffer because the website looks bad.

    I have to say without your review I wouldnt even consider buying from a website that looked that amateur. I'd be worried I was dealing with an amatuer at optics too.

    The EPs do look nice though.
    Thirty spokes meet at the nave, because of the hole we may use the wheel.
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  10. #6
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    Ha! My eyeballs feel out the first time I ever went to his web site-- but the optics he sells are first rate.
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  11. #7
    OleCuss's Avatar
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    I hate the review!!!

    Now I have to start saving money for those works of art. . . Those eyepieces are gorgeous and I already knew I needed a few good Orthos - and it sounds like those may fit into the "must have" category.

    Now I'll be miserable until I have some of those. . .

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