twin-lens re-flex camerae
Also called twin-lens reflex.
a camera in which
appears on a ground-glass viewer (focusing screen)
after being reflected by a mirror or after passing through a prism or semitransparent glass; in one type (single-lens reflex camera)
light passes through the same lens to both the ground glass and the film, while in another type (twin-lens reflex camera)
light passes through one lens (viewing lens)
to the ground glass and through a second lens (taking lens)
to the film, the lenses being mechanically coupled for focusing.
World English Dictionary
|a camera in which the image is composed and focused on a large ground-glass viewfinder screen. In a single-lens reflex the light enters through the camera lens and falls on the film when the viewfinder mirror is retracted. In a twin-lens reflex the light enters through a separate lens and is deflected onto the viewfinder screen|
Collins English Dictionary - Complete & Unabridged 10th Edition
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