I have no hint on this - there are viewfinders that run through a narrow canal and then reach your eyes. If I remember correctly, pentax 645n is such a thing. The viewfinder factor are intuitively decided by frame size, the distant the rays will travel from the mirror to the prism and from the prism to the diopter. A simple decision is that if you want seem something with your eyes, go binocular or monocular, use telephone lenses only if you want to take pictures.
我觉得公式应该是 f * s / 50 f是镜头焦段 比如200mm 180mm 135mm s是viewfinder的放大率(装上50mm镜头时候) 5d2的放大率是0.71 那么8x望远镜对应的长焦镜头则是563mm 好像这么牛的大炮没人有啊。。。 得拿2x镜装上300大炮才行
N*D
15 楼
zeiss刚出了个photo-scope, 就是field-scope + digital camera
【在 s*****g 的大作中提到】 : I have no hint on this - there are viewfinders that run through a narrow : canal and then reach your eyes. If I remember correctly, pentax 645n is : such a thing. : The viewfinder factor are intuitively decided by frame size, the distant : the rays will travel from the mirror to the prism and from the prism to : the diopter. : A simple decision is that if you want seem something with your eyes, go : binocular or monocular, use telephone lenses only if you want to take : pictures. :
a*6
16 楼
哥们,看月亮还得上大双筒阿!
s*g
17 楼
Zen Ray is flat, flatter than most binoculars, my only complaint about zen ray.