Sigma APO or OS Lens

Discussion in 'UK Photography' started by Peter Franke, May 16, 2009.

  1. Peter Franke

    Peter Franke Guest

    I want to buy a 500 mm lens for my Pentax K10D.
    I seek a affrodable lens with the best quality at the 500 mm range
    The choices are:

    Sigma 50-500 mm F/4-6.3 EX DG APO Pentax AF
    Sigma 150-500 mm F/5.6-6.3 OS APO Pentax

    What is better a DG or a OS ens ?

    Peter Franke, May 16, 2009
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  2. Peter Franke

    Woody Guest

    Simple question - does you camera body have built-in image

    If it is built-in to the body then get the 50-500.

    If it is not built-in then get the 150-500 as - IMSMC - the OS in
    the title indicates optical stabilisation in the lens.

    You don't want it in both as they may interact and you get very
    strange effects.
    Woody, May 16, 2009
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  3. Peter Franke

    Bruce Guest

    All very interesting. However, we have two replies that concentrate
    only on the focusing and anti-shake technology of these two Sigma

    Absolutely nothing was said about the optical quality, which was the
    original poster's question. He said:

    "I seek a affordable lens with the best quality at the 500 mm range."

    So which lens offers the best quality at 500mm?
    Bruce, May 16, 2009
  4. Peter Franke

    Bruce Guest

    Thanks David.
    Bruce, May 16, 2009
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