Reviews and Problems with Pentax smc DA 50-135mm F2.8 ED [IF] SDM
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Value for money 8
Overall quality 7
Build quality 9
Pentax SMC-DA* 50-135mm f/2.8 ED [IF] SDM - Review / Test Report
22 April 2008
Conclusion: The Pentax SMC DA* 50-135mm f/2.8 ED [IF] SDM is a high quality medium tele zoom lens but just like its Tokina cousin it is not without flaws. The resolution figures are generally very good to excellent except a drop in border quality at wide-open aperture towards the long end of the zoom range.