PURPOSE:To eliminate the projection part of a pentagonal prism on the upper surface of a camera and to make an entire form compact by respectively making the upper surface and the bottom surface of a camera main body nearly coincident to the heights of the upper edge and the lower edge of...
176 is an octagonal pentagonal number.177 is the number of graphs with 7 edges.178 has a cube with the same digits as anoher cube.179 has a square comprised of the digits 0-4.180 is the toal number of degrees in a triangle.181 is a strobogrammatic prime.182 is the number of ...
Then, the focusing screen 30 of the finder optical system and a pentagonal prism 31 are also lowered. Thus, the main body is made compact in the back-and-forth direction and height direction.MUKAI HIROSHITANIGUCHI NOBUYUKIKAJITA HIDEOHASHIMOTO TAKESHI...
which the image is formed, and a pentagonal prism modified in that one of the reflecting surfaces 5 thereof is convex outwards, so as to provide for an enlargement of the image in the path of the light beam within the prism in which the image is re-inverted to be viewed by an ...