Light shielding plate, camera unit, and electronic device

A light shielding plate made of metal, comprising:

• a front surface located on a light incident side;
• a rear surface facing away from the front surface;
• and
• an aperture penetrating through the front surface and the rear surface, wherein
• the aperture includes a first aperture portion and a second aperture portion connected to the first aperture portion via a central opening, the first aperture portion extending from a rear opening in the rear surface toward the central opening and having a shape tapered from the rear surface toward the front surface, the second aperture portion extending from a front opening in the front surface toward the central opening and having a shape tapered from the front surface toward the rear surface, the front opening being larger than the rear opening;
• and
• when an image of an edge of the central opening is captured in a radial direction thereof by bringing the edge into focus under imaging conditions where a depth of field is 0.4 μm, a maximum focusable length of the light shielding plate that can be in focus in a thickness direction thereof is 30% or less the thickness of the light shielding plate in the thickness direction thereof.