Forum: Pentax SLR Lens Discussion
06-12-2015, 01:16 PM
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Most likely due to two things: price and the fact that it isn't officially a full-frame lens.
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Forum: Pentax SLR Lens Discussion
06-11-2015, 01:53 PM
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Quality lenses rarely become obsolete, but advances in coatings, optical designs, and mechanical design generally give modern lenses an edge. For example, you won't find silent AF in a film-era Pentax lens, and you'll likely get more fringing.
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