PURPOSE: To suppress the generation of a ghost image by providing a light shielding board at the light axis rear side of a diaphragm blade with separating for a fixed interval.

CONSTITUTION: A light shielding board 1 is provided at distance not to cut off the luminous flux of a normal image indicated by lines 20. The luminous flux of the lines 20 passes through the hole of the light shielding board 1, respective lenses 15B to 15D and is imageformed on an image pickup element face 16. However, diaphragm blades 6 and 7 are processed with the coated sheets of reflecting prevention in many cases, reflect light, the light advances in an image pickup element 16 direction and the reflected luminous flux is cut off by the light shielding board 1. Besides, a luminous flux 32 reflected at the image pickup element face 16 is reflected on an ND filter face 2 again, advances in the direction of the image pickup element 16 and is cut off by the light shielding board 1 and the improvement of picture quality can be attained.