Variable magnification optical zoom lens system
Variable magnification viewfinder
Variable magnification viewfinder
Variable power lens systems for producing small images
Variable power optical system
Variable power optical system and image pickup apparatus
Variable power optical system and image-recording device
Variable power optical system and image-recording device
Variable power optical system and imaging device
Variable power optical system and imaging device
Variable power optical system for copying machine
Variable power optical system, image pickup lens device, and...
Variable power optical system, imaging apparatus, and...
Variable power optical system, imaging lens system and...
Variable power projection lens
Variable-focal-length lens system and imaging apparatus
Variable-focus lens system
Variable-magnification image-forming optical system
Variable-magnification optical system and image taking...
Variable-optical-property element