Radiometric calibration device and method
Range binoculars
Re-focusing mechanism for imaging system
Re-imaging converter lens apparatus and method
Real image finder
Real image mode finder and camera using the same
Real image mode finder optical system
Real image mode finder optical system
Real image mode finder optical system
Real image mode variable magnification finder optical system
Real image mode variable magnification finder optical system
Real image type finder
Real image type viewfinder
Real image type viewfinder
Real image type viewfinder optical system
Real image type zoom finder, and imaging system...
Real image viewfinder
Real image viewfinder optical system
Real time type viewfinder
Real-image finder optical system