Was out with the 25mm on my E-M5 today and didn't notice the rattlesnake noise so I tried to generate it by pointing the camera towards the sun then away, to the sky, and anything else I could think of and it simply stayed silent. I never got the rattlesnake as bad with the E-M5 as I do with my E-P3 but I did get it and now nothing today.

Anyone else noticing this?

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Spoke too soon. Just tried it indoors pointing the camera at a fluorescent light and I got the rattlesnake. Seems my outdoor success was simply good luck with the available light at the time (late afternoon).

I find it to be not 100% rattle-proof but much, much better than it was on my E-PL1 and now my E-PM1. Most days it is silent even when trying to make it rattle in the same manner that you describe, yet occasionally I have heard it give a gentle rattle without any real apparent reason.

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Nic
E-M5, GH1
Flickr Photostream
>> Insert quote here <<

I noticed this for the first time yesterday with the 25m, but its not too bad.

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Olympus OMD EM-5, 7-14, 25, 45, 100-300, Canon FD 50mm f1.8, Konica Hexanon 135mm f3.5, Gorillapod SLR Zoom, My Flickr
http://chrismitchell.zenfolio.com/

Like others I find it to sometimes do it, sometimes not. More often than not, it will not rattlesnake.

Either mine:

a) Doesn't rattlesnake at all
b) Or it does but since I don't shoot in total silence, I can't hear it

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Olympus E-PL5
M. Zuiko 17mm ƒ1.8 | M. Zuiko 17mm ƒ2.8 | M. Zuiko 14-42 II | M. Zuiko 14-150 ED | M. Zuiko 45mm ƒ1.8 ED | M. Zuiko 75mm ƒ1.8 ED | M. Zuiko 75-300 ED II | Leica DG Summilux 25mm ƒ1.4 ASPH | Lumix G Vario 45-200 |

I just got mine from B&H yesterday. Mine rattles randomly. It's loud but I forget all about it when I see the pictures taken with it.

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E-M5 | 12-35 | 45-175 | Smugmug

In my considered opinion, (which means I'm probably wrong), I have my OM-D on single AF most always because of my subjects, and my 25 hardly ever rattles. It seems a little worse on my E-PL3, but since I have the OM-D the Panny 20 is usually parked on the E-PL3.

It has always sounded to me like it was searching for focus, why would it want to snap it's aperture blades open and shut? Does it think it's a castanet? Does it want to be held between some nice Latin ladies breasts? er... NM