The Panasonic 0.8 to 1.0 Zoom Lens is designed for use with the PT-RZ770 / PT-RZ97 / 1-chip DLP Series Projectors. The lens makes it possible to vary the projection distance by changing the focal distance.
Panasonic ET-DLE085 0.8-1.0 Lens Rental
Zoom lens for 1-Chip DLP projectors
Throw ratio:
For WUXGA models: 0.80-1.0 :1