Worst example of plastic use in cameras may not be in cameras themselves

Discussion in 'Digital Cameras' started by RichA, Apr 12, 2013.

  1. RichA

    RichA Guest

    I vote for tripods with plastic latches. I've rarely seen one that
    didn't eventually crack or break outright. I had three cheap
    Manfrotto products that all suffered from this. Putting plastic under
    constant tension is a recipe for disaster.
     
    RichA, Apr 12, 2013
    #1
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  2. RichA

    Eric Stevens Guest

    Overtightened.
     
    Eric Stevens, Apr 12, 2013
    #2
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  3. RichA

    Peter Irwin Guest

    It is probably a question of temperature. Plastics tend to become
    brittle at low temperatures, and while the manual may say you
    shouldn't use a certain tripod at temperatures below -10C, that
    is a silly restriction for something you intend to use outdoors
    year round in Canada.

    Peter.
     
    Peter Irwin, Apr 13, 2013
    #3
  4. RichA

    Alan Browne Guest

    It depends on the plastic. Some do well over extremes of temperature
    and hence are used in military and aerospace parts exposed to the cold.

    Down to -40° (F or C) PFA is more than up to the task. For colder there
    are other plastics that do quite well.

    PTFE, PCTFE, FEP for example can go extremely low (towards 0 K) without
    becoming brittle.
     
    Alan Browne, Apr 13, 2013
    #4
  5. RichA

    RichA Guest

    I've got a pellet pistol made by BSA in Britain. It's essentially a
    cut-down rifle. To cock it (it's break-action) you put a plastic tube
    over the end of the barrel to provide leverage. I've had it for
    decades. Whatever the plastic is they used on it, it's the strongest
    plastic I've ever seen. Additionally, I've got a Cullman tripod
    (German) that I've had for years that has plastic leg clasps that
    hasn't broken yet, so maybe it's just garbage Manfrotto and Slik that
    suck?
     
    RichA, Apr 14, 2013
    #5
  6. RichA

    Eric Stevens Guest

    I've had a Manfrotto for about 5 years and the only plastic parts are
    the toggles. I've never had any sign of problems from any of them.
    I've got a 25 year old Velbon tripod with various plastic parts
    including toggles, none of which have given any sign of trouble.

    I have to ask, what do you do to yours that gives you the problems you
    complain about?
     
    Eric Stevens, Apr 14, 2013
    #6
  7. RichA

    J. Clarke Guest

    The propeller blades on many modern aircraft including the E-2 and the
    new Airbus A-400M are made mostly of plastic you know and operate fine
    at -40.
     
    J. Clarke, May 8, 2013
    #7
  8. RichA

    Eric Stevens Guest

    They have to be able to to operate at -60C.
     
    Eric Stevens, May 8, 2013
    #8
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