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Latest Review Posted Tamron-F 1.4X Pz-AF MC4
Bought this converter for using it with the DA* 300mm F 4.0 ED/IF SDM. I bought is secondhand for 175 euros. In the netherlands it is not possible to buy this lens new at this moment. The lens hunts en only sometimes locked and also other SDM Lenses had de same problem with my copy of the Tamron-F 1.4X Pz-AF MC4. :hmm: By screwdrive lenses as the FA* 300mm F 4.5 ED/IF its works verry well (on AutoFocus) and the IQ is very good here.:) It make sharp pictures and the briljance of the lens is not less than without using the converter. So it is possible now to have a 420mm and that is what i am using this object.;) i AM glad i haven't sold mij old FA* 300mm F 4.5 ED/IF.:D i gues pentax at this moment don't make a converter becouse of the same problems with SDM. But i hope they come out with it without these problems.

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