Lenses aren't supposed to be open. And the singular spelling is LENS not "lense", Plural is lenses. Yeah, I've taken a lens apart with no intent to put it back together (HUGE crack down the barrel so I thought, "eh, why not?". I was trying to keep everything in tack though and I broke sooo many things. That's what I'd be worried about if I were you. The electrical contacts are easy to damage.