Ocular lens

Ocular lens system

Ocular optical system and ocular image display apparatus

Ocular optical system for a viewfinder with variable visibility

Optical magnifier

Optical magnifier suitable for use with a microdisplay device

Optical system and lens element for view finder

Optical system for telescope

Optical system for telescope

Optical system for use with a viewfinder

Precision composite article

Re-imaging optical system

Real image albada finder

Real image mode finder and camera using the same

Real image mode variable magnification finder

Real image type zoom finder optical system

Real-image type optical finder

Remote viewing process and apparatus

Reverse Galilean finder with projected front window

Sighting device