On 35mm camera lenses, what is the name of the measurement for the thread diameter at the front of the lens?

November 28th, 2009 | by admin |

Most 35mm film camera lenses have a screw thread on the inside of the lens housing at the front, which is used to attach filters or a sun hood. The diameter of this thread is usually marked on the front of the lens in millimeters, such as 49, 52, or 55, followed by an "o" with a diagonal slash through it. I need to know the name of this measurement. (It’s not "focal length".)

Filter size … that was easy

  1. 3 Responses to “On 35mm camera lenses, what is the name of the measurement for the thread diameter at the front of the lens?”

  2. By fhotoace on Nov 28, 2009 | Reply

    Filter size … that was easy
    References :
    proFotog

  3. By smallbluepickles on Nov 28, 2009 | Reply

    Darn fotoace beat me to the answer! Yes it’s filter size.
    References :

  4. By Nathan G on Nov 28, 2009 | Reply

    The filter size.

    And no, i didn’t copy from the other two, i knew the answer.
    References :

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