Interesting DOF non-scientific test

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

  1. 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.

    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
     
  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.
     
  3. 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.
     
  4. 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.
     
  5. 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).
     
Loading...
Similar Threads Forum Date
Interesting newcomer for Nikon... Lens Lust Mar 19, 2016
Venus 60mm 2:1 Macro (for anyone who is interested) Lens Lust Jan 17, 2015
Interested in a new lens, about $2,000 budget Lens Lust Nov 8, 2014
70-210mm f/4 interesting Lens Lust Sep 4, 2013
DOF invariance? Lens Lust Oct 31, 2012