retrofocus lens: meaning, definition, pronunciation and examples

Not exactly. Many wide-angle lenses for SLR/DSLR cameras use a retrofocus design, but 'wide-angle' describes the field of view, while 'retrofocus' describes the specific optical construction that makes that wide view possible on certain cameras.

Yes, you can physically mount it, but its design advantage (mirror clearance) is unnecessary on mirrorless bodies. Simpler, non-retrofocus wide-angle designs are often preferred for mirrorless systems as they can be smaller and optically superior.

The retrofocus design is widely credited to Horace W. Lee of the Taylor-Hobson company, who patented it in 1930. It was later popularised by Angénieux in the 1950s for 35mm movie cameras.

A telephoto lens is conceptually opposite in its design goal (long focal length, short physical length). For wide-angle lenses, the opposite design is a symmetrical or non-retrofocus lens, where the rear element is close to the film plane.

A wide-angle photographic lens designed with a back focal distance longer than the focal length of the lens, allowing clearance for SLR camera mirrors.

Retrofocus lens is usually technical in register.

Retrofocus lens: in British English it is pronounced /ˈrɛtrə(ʊ)ˌfəʊkəs ˌlɛnz/, and in American English it is pronounced /ˈrɛtroʊˌfoʊkəs ˌlɛnz/. Tap the audio buttons above to hear it.