Olympus 9mm f/8 issue?

Rig Vader

Mu-43 Regular
May 24, 2012
Just got the 9mm and noticed that a "springy" sound occurs sometimes. The sound can be up to several seconds in length before it fades.

It happens when the lens is "tapped" lightly (hold the lens by it's edges and tap the back) or when for instance closing the back LCD (e-m5 after it's been tilted out) while the lens is mounted. Seems to happen mostly when the focus adjustment is at 0.2 meters and least when the cover is closed.

Do any of you get this? I know it's a cheap lens, but honestly the 45mm 1.8 is only 2.1 times more locally (which either makes the 9mm a rip off or the 45mm a steal), so I'm keen on getting a dud :)

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