Roger Cicala goes Grey's Anatomy on the Panasonic Pancaces

Today i learned there is a giant spring inside the Panasonic 20mm lens:

"The spring has something to do with the fact that the lens assembly extends for close focusing. Whether it helps the motor move the lens, or the motor only moves the lens back and the spring moves it forward, I can’t say. But if you put the lens back together without the spring, it doesn’t focus. (Pretty simple way to figure it out, huh?)"

 

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