Canon 50/1.4 light fall-off ?

Discussion in 'Canon' started by fgphotog, Sep 3, 2003.

  1. fgphotog

    fgphotog Guest

    I didn't keep f-stop records so I dont know at which aperture the problem
    starts appearing, but I have just returned from a european trip where I used
    my new 50/1.4 extensively . I have found that in most landscapes featuring a
    clear blue sky there is significant light fall off on the left and right
    side of the frame. Almost a vignetted look (I have the dedicated lens hood).
    Disappointing. Is this common with this lens ? At what aperture does it
    appear ? Comments ?

    thanks Frank
     
    fgphotog, Sep 3, 2003
    #1
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  2. fgphotog

    Adam F Guest

    you can expect severe light fall-off between f/1.4 and f/2, sometimes up to
    f/2.8 on any ultra-bright lens

    canon 50/1.4 should be ok from f/2 up though, if not you may have a bad
    example


    adam f
     
    Adam F, Sep 3, 2003
    #2
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  3. fgphotog

    Dave Guest

    Were you using a filter? Slim or regular? Maybe some of the vignetting was
    due to the filter

    Dave

    ..
     
    Dave, Sep 3, 2003
    #3
  4. How can you have a bad example? Surely it's <simple> geometry, and fixed during
    design?
    Perhaps using a more contrasty film. e.g. Velvia 50 ISO, which is both
    contrasty, and perhaps slower than the marked 50 which would exacerbate any
    vignetting.
     
    Malcolm Stewart, Sep 3, 2003
    #4
  5. fgphotog

    fgphotog Guest

    no filters at all.
    & using 100asa/iso transparency film.
     
    fgphotog, Sep 3, 2003
    #5
  6. Were you using a polraizer or filter?
     
    Michael Scarpitti, Sep 3, 2003
    #6
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