e/Compound shutter

Information
has gloss	eng: The Compound shutter is a mechanical leaf shutter for photographic cameras introduced in the late 19th century, usually used between lens components. A typical Compound shutter may have settings for T (Time), B (Bulb), and times from 1 second down to 1/100th or less.
lexicalization	eng: Compound shutter
instance of	c/Photographic shutters