Focus Shift

Discussion in 'Leica M and LTM Lenses' started by Christilou, Mar 10, 2014.

  1. Christilou

    Christilou Leica Place Veteran

    358
    Apr 5, 2013
    I'm not absolutely sure quite what this means in absolute terms however, regarding my 35mm Voigtlander 1.2 II I find that I set the lens (uncoded) for Leica's 35mm 1.4. When I close focus in the rf what appears to be in focus is hugely out when I check in the evf, by a fair bit. I'm wondering if this is focus shift?
     
  2. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    It is not focus shift, but more that the lens does not agree with the rangefinder of the camera. If the lens is focusing behind the point indicated by the Rangefinder, the "RF Cam" of the lens can be thickened by adding a little bit of tape: I use copper tape. Manufacturers make assumptions regarding how FILM sits in a camera, and the Voigtlander lenses seem to be calibrated for their own lenses. I found one layer of copper tape brought mine into perfect agreement.
     
  3. Christilou

    Christilou Leica Place Veteran

    358
    Apr 5, 2013
    Thanks Brian, I think I read that the RF can only focus from 0.7 onwards but I can focus closer using the evf thankfully. Can you point me to anything about focus shift so that I can read a bit more?
     
  4. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
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