Reviews and Problems with Pentax SMC DA 60-250mm f/4 ED [IF] SDM
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Pentax DA* 60-250mm F4
10 November 2013
Summary: To summarize, we really like this lens! It is an excellent tool with many perks and no real faults. The DA* 60-250mm is arguably one of the best lenses in the current high-end Pentax lens lineup due to its versatility and stellar optical performance.
Pros: Excellent image quality wide-open, Sharp, Very few aberrations for a zoom, Excellent build quality, Several sensible and unique design elements, Weather sealing, Silent autofocus, Very convenient zoom range, Internal focus, Quick-shift full-time manual focus override (and a well-designed focus ring)
Cons: No internal zooming (barrel extends significantly), AF somewhat slow for sports, Just barely hand-holdable, Expensive
Pentax SMC DA* 60-250mm f/4 ED [IF] SDM - Review / Test Report
13 January 2010
Conclusion: The Pentax SMC DA* 60-250mm f/4 ED [IF] SDM is a highly desirable long tele zoom lens with only minor weaknesses (except QC maybe). It is very sharp through its range and even the secondary aspects such as distortions, vignetting and lateral CAs are well controlled. While not formally tested the high quality of the bokeh (out-of-focus blur) seems to be a differentiator compared to similar lenses - long tele zoom lenses are often problematic here.