Ellipsoidals (Ellipsoidal Reflector Spotlights or ERS) are speified by the measurement of the lens size and focal length (19°, 6 x ?, 3 1/2 x ?, mini, etc.) and are available in fixed or zoom focus. Commonly called "Leko," profile pattern unit, or spotlight, these units are designed with an ellipsoid-shaped reflector, front condensing lens(es) and framing shutters. Front lens(es) are mounted in a moveable "barrel" which allows the focus to be changed from sharp to soft. Fixed focus barrels are removable to ease design changes. Zoom units have an adjustable beam spread, while fixed focus units do not.

Ellipsoidals are used in applications where a great deal of control is needed over what is lit by the fixture and the shape and sharpness of the beam, with their primary specialty being pattern projecton. Most ellipsoidals have dual "gel slots" to accommodate accessories (gel extenders, top hats, donuts, etc.) and also a separate slot to hold an iris, gobo rotator, or other motion effects units. Please note that these fixtures can be used with a variety of motion effects devices to create exciting visual effects. Accessories are available for some ellipsoidals to facilitate their use as a followspot.