Try turning off flicker reduction. It has helped for some FMs.
Same here with my P/L 25mm F1.4 mounted on EM5. Once I changed Flicker Reduction I never heard the rattlesnaking noise again.One year later (and thousands of photos with this lens), never heard rattlesnaking noise on this lens, after turning off flicker reduction.
So thanks again for the tip!
I'm sorry I sold my 25mm before I got my EP5, so I don't know if that lens needed a special setting on the EP5. It was the EM5 that req'd. Flicker Reduction.Do we have that option on E-M5, or do you mean E-P5? BTW, PL25 makes that rattlesnaking on my GM1 occasionally. But far less than on the E-M5.