Rear-focus-type zoom lens
Rear-focusing telephoto lens system
Reduced diameter camera lens barrel with lens shift device and i
Reduction gear mechanism
Reflecting type of zoom lens
Reflecting type of zoom lens
Reflecting type of zoom lens
Reflex, magnifying optical system
Refractive multispectral objective lens system and methods...
Resetting mechanism for electronic theodolite
Retractable type lens barrel
Retractable type lens barrel
Retractable zoom lens
Retracting mechanism of a zoom lens barrel
Retracting mechanism of a zoom lens barrel
Retro-focus-type camera lens
Retrofocus type lens
Retrofocus type wide angle lens comprising a fixed group and mov
Reverse telephoto zoom lens
Ring member shift mechanism and lens group shift mechanism