Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,542   Posts: 1,544,392   Online: 1000
      
Results 1 to 3 of 3
  1. #1

    Join Date
    Jan 2006
    Shooter
    Med. Format Pan
    Posts
    202

    That plastic dome on lenses. What does it do?

    On a lot of SLR lenses, there is a small plastic dome near the lens mount. For instance, the red dome on Minolta and Leica lenses, white dome on Pentax Lenses or blue dome on Zeiss.

    I have read somewhere that it is referred to as a "finger point". Is there any functional value to this dome? I always thought it was there for marketing purposes only.

  2. #2
    Lee L's Avatar
    Join Date
    Nov 2004
    Shooter
    Multi Format
    Posts
    3,244
    On Zeiss and Leica it aligns with the lens mounting release lever on the body, allowing you to mount the lens by feel, matching up a finger or thumb on the lens dot with a finger or thumb on the camera body. You can change lenses in the dark or without looking (as in keeping an eye on your subject). If you learn to use your equipment correctly, the raised dot is highly utilitarian. If not, it's considered an affectation.

    I'm not saying the other brands don't work the same way, I haven't used them.

    Lee

  3. #3
    Anscojohn's Avatar
    Join Date
    Dec 2006
    Shooter
    Medium Format
    Posts
    2,727
    Images
    13
    Quote Originally Posted by Hamster View Post
    On a lot of SLR lenses, there is a small plastic dome near the lens mount. For instance, the red dome on Minolta and Leica lenses, white dome on Pentax Lenses or blue dome on Zeiss.

    I have read somewhere that it is referred to as a "finger point". Is there any functional value to this dome? I always thought it was there for marketing purposes only.
    ******
    It allows matching up the bayonet mount by feel when changing lenses.
    John, Mount Vernon, Virginia USA



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin