Panasonic 0.38:1 Lens for PT Series Projector ET-DLE030 – Buy now from 10Kused
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File:Vintage Panasonic Model 660 (aka JE-660U) Handheld LED Electronic Calculator, Made in Japan, Price Was $59.95 in 1974 (8716009192).jpg - Wikimedia Commons
Throw Distance Calculator
Panasonic Professional PTZ Camera Field of View Calculator | Panasonic North America - United States