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Pentax issues

he letter in (AP 6 July) questioning the reliability of certain Pentax products reflects my experience with a DA* 50-135 f/2.8 lens. The optical quality is superb but I experienced a focus lock-up which cost in excess of £100 to repair through an authorised agent. Within 12 months, I experienced the same problem and a bill for £150+. I was astounded to read in a US review that it was a known fault! One would expect it to be more widely reported in the press. As a result, I abandoned my life-long allegiance