Weather sealing of a size-changing zoom

Started Mar 23, 2013 | Discussions thread
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tt321
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Weather sealing of a size-changing zoom
Mar 23, 2013

The 12-35 changes size when zooming, which means that the total volume of the lens+camera (on e.g. a weather sealed body like the E-M5) changes when you zoom, and air presumably is sucked in or pushed out. Does this air get filtered through some moisture/dust filter?

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