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  1. #1
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
    Posts
    9,560

    Question The new Pentax 645 monster ...

    This new 645 camera has 12-contacts to the lens! What in the heck could you need that much electrical control of in a lens? It defies explanation.

    Attachment 54865

    More than 'nuff said! Geesh!
    Don Schap - BFA, Digital Photography
    A Photographer Is Forever
    Look, I did not create the optical laws of the Universe ... I simply learned to deal with them.
    Remember: It is usually the GLASS, not the camera (except for moving to Full Frame), that gives you the most improvement in your photography.

    flickr & Sdi

  2. #2
    Join Date
    Oct 2006
    Posts
    756
    Quote Originally Posted by DonSchap View Post
    This new 645 camera has 12-contacts to the lens! What in the heck could you need that much electrical control of in a lens? It defies explanation.
    I expect it's basically a legacy issue. Remember, this is a fairly classic lens mount. Rather than have a digital information exchange, with data serialized and sent as messages, probably different pins are on or off. 12 contacts, then, give only a little over 4000 possibilities, which isn't a whole lot when you consider that it should tell focal length, aperture, and etc.
    Looking to buy a Pentax flash? Check out my Definitive Guide to Pentax P-TTL Flash Options.

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