Variable power view finder for camera - has condenser lens between objective lens and image erector assembly

摘要

The real image type of variable power view finder has an objective lens system r1 - r12, an image erecting optical system r15, r16, and an eyepiece lens system r17-r20, located in this order as viewed from an object to be photographed. The objective lens system may include negative and positive lens groups located in this order from the object side so as to vary the distance between to change the magnification. - The negative lens group of the objective lens system may have at least two negative lenses r3 - r6. The eyepiece lens may have positive and negative lens groups. A condenser lens CO may be between the objective lens and the image erector. F is a field flattener lens.