pentax and the best bokeh for the buck

Discussion in 'Pentax' started by niceparking, Oct 18, 2006.

  1. niceparking

    Bandicoot Guest

    Bandicoot, Oct 27, 2006
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  2. niceparking

    Tony Polson Guest

    Peter (Bandicoot) has recommended some of the very best Pentax lenses.
    They are of course well known among Pentax users, so it is not
    surprising that people hold on to them. If you are patient, they will
    eventually show on eBay.

    When I decided which Pentax lenses I wanted, I set up an eBay search
    and ran it daily until they appeared. I have since done the same with
    Leica, and I managed to build my Leica outfit at what I consider to
    have been excellent prices.

    Tony Polson, Oct 27, 2006
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  3. For the record, it's simply, "Limited". I don't think they're
    referring to a limited quantity or produciton, but the quality of the

    Mike Hamilton, Oct 31, 2006
  4. niceparking

    Tony Polson Guest

    Yes, I certainly agree that the quality of these lenses is "Limited".
    Considering Pentax's expressed claims that bokeh was a high priority
    in their optical design, I can only conclude that Pentax have failed,
    certainly in the case of the three focal lengths I tested (31mm, 43mm
    and 77mm - all weird focal lengths too!).
    Tony Polson, Oct 31, 2006
  5. Do you know of any example pics online?

    Richard Polhill, Oct 31, 2006
  6. Thanks Tony for a very informative post. I am very impressed!
    helensilverburg, Oct 31, 2006
  7. niceparking

    jeremy Guest

    It is not possible to directly compare human vision to a photo, because
    humans do not see an entire scene all at one time. Our eyes rapidly shift
    from one point to another, while our brain "stitches" all the individual
    views together and gives us the impression that we are viewing everything
    all at once.

    That having been said, the question is what makes a lens "normal."

    A normal lens creates images where the spatial and size relationships
    between the various objects in the frame look as they would to the human

    That quality is critical to those of us that take
    documentary/historical/architectural photos, where our main objective is to
    record the scene for posterity in a way that it will look as closely as
    possible to the way it would have been seen had the viewer actually stood
    there in person.

    I once shot a street scene using a 24mm lens-the only lens I had with me at
    that moment. There were two buildings--a 3 story structure on one corner,
    and a 10-story bank building located about a half block further back in the
    distance. The apparent perspective distortion produced by the wide angle
    lens resulted in a photo where the 10-story building was not even twice as
    tall as the 3-story one. Anyone looking at that photo could sense
    intuitively that something about it just wasn't right, even though they
    might not have been able to pinpoint exactly what was wrong.

    I typically use a 50mm lens to record such scenes, because that focal length
    renders objects that retain their relative sizes when compared with other
    objects in the scenes. My digital camera can zoom to an equivalent of 43mm,
    and I normally use that focal length when shooting digital. I have found it
    to be best at keeping relative size differences constant. The 50mm lens
    that I use in 35mm is close enough to maintain the spatial relationships,
    and the 55mm lens, while a tad on the tele side, is still acceptable.

    Many photographers do not fully grasp the effects of using focal lengths
    that fall beyond the normal range. While such lenses are effective at
    producing special views (assuming that the photographer knows what he wants,
    and understands which lens to use to achieve his desired effect) the normal
    lens holds a special place for those of us whose objective is recording
    scenes that are as close to reality, in terms of perspective, as possible.

    I have become so dependent on my normal lenses that I often take only a
    single normal lens when I take my camera out. Any "zooming" I need can be
    done with my feet. Strange as it seems, I don't miss the variety of focal
    lengths offered by zoom lenses, and my documentary record shots maintain a
    consistency among all of them, as the same focal length was used for all the
    shots. That is especially good when shooting multiple angles of the same
    building or street scene. The viewer does not have to mentally adjust to
    compensate for varying focal lengths used when the shots were taken, as
    would typically have been the case had a zoom lens been used.
    jeremy, Oct 31, 2006
  8. I should have been more clear on what I was replying about:
    I saw a used lens in a camera shop and noticed the yellowing too. I was
    wondering what that was. Makes sense now.
    helensilverburg, Oct 31, 2006
  9. niceparking

    Tony Polson Guest

    Thank you, Helen, for the kind words.
    Tony Polson, Nov 1, 2006
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