Mirror adjustment method and apparatus

Observation device and camera

Optical apparatus having a function to adjust the diopter

Optical system for photographing device

Parallax compensation apparatus for camera

Parallax correcting apparatus of a real image type of viewfinder

Parallax correcting apparatus of a viewfinder

Parallax correction for close focus

Photo printing system and camera for the same

Photographing apparatus and method, and program

Picture frame switching mechanism

Ratcheting diopter adjustment device

Real image mode finder optical system

Real image mode finder optical system

Real image mode variable magnification finder

Real image type finder

Real image viewfinder which shifts prism ridge line away from ta

Real-image finder and optical device having the same

Real-image finder optical system

Real-image type viewfinder