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Comment by Dizzifox posted on smc da 50-135 f2.8 autofocus fault at 03/07/2015 - 15:27
HI All
I have a Pentax K5 and bought a used Pentax smc 50-135 f2.8 lens about a year ago. It worked perfectly until recently but now it wont autofocus at all ( I don't mean it struggles I mean it wont even try)
The strange thing is it works perfectly on my old camera (k100d) and my other lenses work fine on the K5.
Any advise would be greatly appreciated.
D
I have a Pentax K5 and bought a used Pentax smc 50-135 f2.8 lens about a year ago. It worked perfectly until recently but now it wont autofocus at all ( I don't mean it struggles I mean it wont even try)
The strange thing is it works perfectly on my old camera (k100d) and my other lenses work fine on the K5.
Any advise would be greatly appreciated.
D
Comment by Dizzifox posted on smc da 50-135 f2.8 autofocus fault at 03/07/2015 - 14:06
The SDM focus motor had probably given up, it's a fairly common problem with older copies of the 50-135mm and 16-50mm. It will work fine on your K100D as that uses 100% screw drive whereas the K-5 will use the SDM.
Repair cost is approximately £180-£200.