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Thread: Eyepieces, Barlow, Smyth lens: FAQ

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    Default Eyepieces, Barlow, Smyth lens: FAQ



    Hello all,

    as the optics design of the eyepieces, and the use of a Barlow, and the function of the Smyth lens, are frequently asked questions on the AF, here is a link to the fundamentals discussing the historical perspective up to the modern Nagler-type eyepieces:
    A Chronological History of Smyth & Barlow Lenses

    Enjoy the well structured read,

    JG
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    Default Re: Eyepieces, Barlow, Smyth lens: FAQ

    Thank you JG I enjoyed the information. I found it interesting that the Televue Powermate is actually based on a Bausch & Lomb design originally made in 1948!
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    Default Re: Eyepieces, Barlow, Smyth lens: FAQ

    That looks like an interesting read. I will spend more time with it tonight since its going to be cloudy anyhow.

    Thanks for the link
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