Want to see an odd DOF effect?

Discussion in 'Digital Cameras' started by RichA, Apr 24, 2011.

  1. RichA

    RichA Guest

    RichA, Apr 24, 2011
    #1
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  2. RichA

    Bruce Guest


    The Zuiko lens was quite obviously focused at a distance shorter than
    the distance to the first battery. So, just as with most of your
    so-called "comparison tests", no conclusions of any kind can be drawn.
     
    Bruce, Apr 24, 2011
    #2
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  3. RichA

    Eric Stevens Guest

    I agree.

    Regards,

    Eric Stevens
     
    Eric Stevens, Apr 24, 2011
    #3
  4. RichA

    RichA Guest

    No, it hasn't been focused shorter.
     
    RichA, Apr 24, 2011
    #4
  5. RichA

    RichA Guest

    You people obviously can't tell the difference between sharpness and
    focus errors.
     
    RichA, Apr 24, 2011
    #5
  6. RichA

    George Kerby Guest

    Olympus owners?!? LOL!!!
     
    George Kerby, Apr 24, 2011
    #6
  7. RichA

    Paul Furman Guest

    Try focusing in the middle so you get some foreground and background OOF
    and can see from the wood table where the focus is. As shot, the focus
    is probably in the air in front of the table edge so you can't confirm
    it. An angled tape measure works very well for this kind of test; you
    can see where the numbers become illegible:
    http://www.flickr.com/photos/edgehill/5364815151/in/set-72157603231101723
    http://www.flickr.com/photos/edgehill/5357491197/in/set-72157603231101723/
     
    Paul Furman, Apr 24, 2011
    #7
  8. RichA

    Bruce Guest


    Oh yes it has.

    You haven't even got the first battery in sharp focus. So this
    "comparison test" tells you absolutely nothing.
     
    Bruce, Apr 24, 2011
    #8
  9. RichA

    Eric Stevens Guest

    That's partly because of the way you set up the test. You should ave
    used a longer row of batteries and focussed on one several batteries
    back from the front.

    Better still you should have used a scale.

    Regards,

    Eric Stevens
     
    Eric Stevens, Apr 24, 2011
    #9
  10. RichA

    RichA Guest

    To satisfy the doubters, I'll shoot a ruler on the incline, they way
    the you when calibrating focus. But I've seen this with Olympus
    lenses before.
     
    RichA, Apr 25, 2011
    #10
  11. RichA

    RichA Guest

    Will do.
     
    RichA, Apr 25, 2011
    #11
  12. RichA

    Bruce Guest


    You've seen it before? You mean, like we've all seen your inability
    to carry out a properly controlled test before?

    Perhaps you wanted *so much* to see a difference between the two
    lenses that you deliberately focused the Olympus lens short of the
    first battery?
     
    Bruce, Apr 25, 2011
    #12
  13. RichA

    RichA Guest

    So you are saying that my conclusions are wrong? Will you admit YOU
    were wrong when I post the next test?
     
    RichA, Apr 25, 2011
    #13
  14. RichA

    Peter N Guest

    Perhaps someone else can duplicate the test. The results will be
    confirmed or not.
     
    Peter N, Apr 25, 2011
    #14
  15. RichA

    Paul Furman Guest

    Sure. Here's some tests that support your initial conclusion about the
    oly's sharpness wide open against the Nikkor (optical formula hasn't
    changed afaik):
    http://www.slrgear.com/reviews/showproduct.php/product/1279
    http://www.slrgear.com/reviews/showproduct.php/product/97
    I'm still skeptical of the degree of blur in the background though.

    Note that the Oly test link is on m4/3 like yours.
     
    Paul Furman, Apr 25, 2011
    #15
  16. RichA

    Eric Stevens Guest

    He is saying you fudged the first exposure to make it demonstrate the
    aspect in which you so desperately believed.

    Regards,

    Eric Stevens
     
    Eric Stevens, Apr 26, 2011
    #16
  17. RichA

    RichA Guest

    RichA, Apr 26, 2011
    #17
  18. RichA

    Me Guest

    Wow, that Olympus lens is very soft and has butt-ugly bokeh.
    The Nikkor 50mm f1.8D isn't regarded as being flash for bokeh (but no
    worse than most of these "standard" f1.4 - f2 ~50mm lenses from any
    maker), perhaps the E is much nicer.
     
    Me, Apr 26, 2011
    #18
  19. RichA

    Better Info Guest

    Better Info, Apr 26, 2011
    #19
  20. RichA

    Better Info Guest

    There's very little to no difference in the "quality" of the bokeh between
    the Olympus and the Yashica. In fact, I prefer the bokeh "quality" of the
    Olympus lens, though slight the difference may be.

    A brainless Nikon fanboi are ye? If so, then you might want to consider
    switching brands to mindlessly rave about if those exposure and aperture
    settings are true. Nikon only became popular on the sheep-principle,
    nothing more.
     
    Better Info, Apr 26, 2011
    #20
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