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Thread: How to recognize a B&L Petzval type..?

  1. #1

    Join Date
    Jun 2014
    Posts
    31

    Question How to recognize a B&L Petzval type..?

    Hi,
    I read a bit, and search for more topics, but still didn't get that answer.
    How to recognize a Petzval B&L ?
    Have you any advices?

  2. #2

    Join Date
    Jun 2014
    Posts
    31

    How to recognize a B&L Petzval type..?

    Hi,
    I read a bit, and search for more topics, but still didn't get that answer.
    How to recognize a Petzval B&L ?
    Have you any advices?

  3. #3

    Join Date
    Sep 2007
    Location
    AZ
    Posts
    4,431

    Re: How to recognize a B&L Petzval type..?

    They usually have a black band right behind the hood, as seen here. Some Wollensaks also have that band though. They always have a short hood, and the knurling on the knobs is usually the same. I'll look for a better picture of the knob.


  4. #4

    Join Date
    Jun 2014
    Posts
    31

    Re: How to recognize a B&L Petzval type..?

    Thanks for that answer
    How many lenses to compose a Petzval? Four right?
    And if any lenses are missing? But sell as a Petzval
    Generally a B&L Petzval can be demounted, not cimented, and all lenses can be clean separately?

  5. #5

    Re: How to recognize a B&L Petzval type..?

    The same way you recognizee any Petzval. Cemented pair up front. Two elements air spaced in the rear. Read http://antiquecameras.net/petzvallens.html


    Good luck
    Dan

    Antique & Classic Camera Blog
    www.antiquecameras.net/blog.html

  6. #6

    Join Date
    Sep 2007
    Location
    AZ
    Posts
    4,431

    Re: How to recognize a B&L Petzval type..?

    A petzval has two separate lenses in the rear, and two cemented (glued) together in the front.

  7. #7

    Join Date
    Oct 2010
    Posts
    3,326

    Re: How to recognize a B&L Petzval type..?

    Garrett's advice is a good starting point, but I have a 15" Bausch & Lomb projection Petzval that is all black (with a serial number around the 1,000,000 mark). I bought it online and had no way of knowing what the configuration was until it arrived. Fortunately, it turned out to be as advertised:




    I also have a number of B&L "Cinephor" projection lenses that are Petzvals, as well as a few labeled "Cinephor" that are not. It can be very confusing.

    Jonathan

  8. #8

    Join Date
    Jun 2014
    Posts
    31

    Re: How to recognize a B&L Petzval type..?

    But you can't open what you buy.
    That's why i asked if there was a way to know, externally.
    Dates, First part like this, knob like that, etc etc...

  9. #9

  10. #10

    Join Date
    Jun 2014
    Posts
    31

    Re: How to recognize a B&L Petzval type..?

    Yes, i don't know how to recognize the B&L projection lenses petzval or not;
    And the black ones seems to be petzval most of the time, but how to be sure...

    This is Petzval?
    http://www.ebay.com/itm/Antique-pate...vip=true&rt=nc
    http://www.ebay.com/itm/Antique-pate...p2047675.l2557

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