简单的针孔相机没有镜头，但具有很小的光圈或针孔，图像的大小也可以改变。 - Buy Student Can View Image Through A Hole In The Other End And Can Also Change The Image Size By Changing The Box Length. simple Pin Hole Camera Comes Without A Lens But Has A Tiny Aperture Or Pinhole From Which Size Of Image Can Also Change. student Can View Image Through A Hole In The Other End And Can Also Change The Image Size By Changing The Box Length. Product on Alibaba.com