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Interesting DOF non-scientific test

Discussion in 'Lens Lust' started by Maestrodawg1, May 9, 2007.

  1. Maestrodawg1

    Maestrodawg1

    1,547
    Aug 12, 2005
    Famington Hills, MI
    Well I just picked up a 50mm 1.4 lens earlier this week. As I was playing with it I ended up taking a few shots out of my car window pointed at the mirror. I shot a series at f stops, 1.4, 2.0, 2.8, 4, 8, and 16. I thought how the DOF and bokeh interacted were really interesting. I also noticed how sharp the background was at all f stops.

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    Maestrodawg1, May 9, 2007
    #1
  2. genehsu

    genehsu

    594
    Apr 15, 2007
    Seattle
    Looks like the lens was focused around infinity, so what you see is what you should expect. If, instead, you focused on the edge of the mirror, then you'd have a different blur series.
     
    genehsu, May 9, 2007
    #2
  3. Maestrodawg1

    Maestrodawg1

    1,547
    Aug 12, 2005
    Famington Hills, MI
    Would it be? To be in focus wouldn't it need to be focused at the approximately 3 foot distance between the camera lens and mirror? I'll have to check next time.
     
    Maestrodawg1, May 10, 2007
    #3
  4. Tierdaen

    Tierdaen

    519
    Mar 5, 2006
    Taipei, Taiwan
    No, it is not focused on the mirror, it is focused on the object the mirror is reflecting, which appears to be quite a bit more than 1 meter.

    Notice how out-of-focus the frame of the mirror is, and how much "clearer" it is at f/8. You're clearly not focused on the mirror itself.
     
    Tierdaen, May 10, 2007
    #4
  5. blw777

    blw777

    856
    May 26, 2006
    Charlottesville, VA / Palo Alto, CA
    To me it looks like you were focused on the BMW in the mirror. That's optically 30-40 feet away (two thirds of your car, plus a couple of car lengths behind you).
     
    blw777, May 10, 2007
    #5
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