Zoom Lenses

Zoom lenses are lenses with a variable focal length and popular for use on SLR and D-SLR cameras. They allow the photographer to remain in the same position whilst varying angle of view, or image size. There are few applications where a zoom is a genuine advantage however, although zoom lenses are an alternative to a range of interchangeable lenses.

Digicams have two types of zoom...

• Optical zoom
• Digital zoom

ZLR - Zoom Lens Reflex, a term coined by Olympus to describe their fixed mount lens SLR type cameras. An SLR camera has interchangeable lenses, a ZLR has a non-removeable zoom lens.