"DaveC" wrote in message
al.net...
Many of the smaller digital cameras don't have a lens cap. Instead, there
are
2 halves of an "iris" (for lack of a better term), located over the
outermost
glass lens, that separate when the camera is powered on, and slide back
together when it's turned off.

What is the mechanism for these shutters? Are they gear-driven? Does it
typically require complete lens disassembly to get to them? Are they
easily
removable (replacing them seems not economical)?

Thanks,
--
Please, no "Go Google this" replies. I wouldn't
ask a question here if I hadn't done that already.

DaveC

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On some Canon cameras, these are operated by spring and levers that use the
motion from the lens opening up and closing.
On the A- series Canon's this mech is located behind the outermost ring on
the lens, where it says "Canon Zoom Lens...".
This circular piece is a metal sticker that covers the mech for these
"flaps". It is almost impossible to peel back this sticker without wrinkling
it, since it is very thin metal. Most work on the opening mech itself still
requires you to disassemble the lens and this is delicate and tricky work.

Jan