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Forum: Pentax SLR Lens Discussion
02-05-2017, 07:15 PM
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I have never had this issue any of my Star lenses, I have three. None of the DA* lenses are known for speedy autofocus. It is well known that SDM motors are a bit sluggish. I always make sure my hand is not on the focus while using autofocus. Normally my hand is laying flat under the bottom of the lens supporting the hood. If you are using Quick Shift focus your hand better be off the autofocus button. The autofocus ring does not lock while the lens is focusing and you can turn it which would be bad news. i have tried to use my 60-250 for sports a few times but just prefer my Tamron 70-200. It focuses faster, locks focus quicker, and is f2.8. However my Tamron can not reproduce the color rendering of a Pentax Star lens. I wish you better luck with the DFA 70-200. That is one heck of a monster lens.
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