Apparatus, control method, and storage medium

A method of an apparatus that includes an imaging unit and is capable of controlling an aperture diameter of a diaphragm for adjusting quantity of light entering the imaging unit, the method comprising:

• performing photometry;
• performing control for controlling a plurality of control values including the aperture diameter of the diaphragm, based on a result of the photometry;
• determining, as a first determining, whether light flux entering the imaging unit enters via a predetermined optical member;
• and
• determining, as a second determining, whether there exists a plurality of F numbers that indicates the aperture diameter of the diaphragm at which approximately identical quantities of light enter the imaging unit, in a case where it is determined in the first determining that the light flux enters the imaging unit via the predetermined optical member,
• wherein the predetermined optical member has light transmitted in quantities varying stepwise in a radial direction with respect to an optical axis, and
• wherein, in a case where there exists a plurality of F numbers at which approximately identical quantities of light enter the imaging unit, the performing control is performed such that the F number is controlled to be differently set in accordance with information regarding a condition.

A non-transitory computer readable medium that stores a program, wherein the program causes a computer to execute a method of an apparatus that includes an imaging unit and is capable of controlling an aperture diameter of a diaphragm for adjusting quantity of light entering the imaging unit, the method comprising:

• performing photometry;
• performing control for controlling a plurality of control values including the aperture diameter of the diaphragm, based on a result of the photometry;
• determining, as a first determining, whether light flux entering the imaging unit enters via a predetermined optical member;
• and
• determining, as a second determining, whether there exists a plurality of F numbers that indicates the aperture diameter of the diaphragm at which approximately identical quantities of light enter the imaging unit, in a case where it is determined in the first determining that the light flux enters the imaging unit via the predetermined optical member,
• wherein the predetermined optical member has light transmitted in quantities varying stepwise in a radial direction with respect to an optical axis, and
• wherein, in a case where there exists a plurality of F numbers at which approximately identical quantities of light enter the imaging unit, the performing control is performed such that the F number is controlled to be differently set in accordance with information regarding a condition.