Accessory apparatus, control method, and storage medium

A method of controlling an accessory apparatus which is removably attached between an image capturing apparatus and an interchangeable lens, wherein the accessory apparatus includes a communication unit configured to perform first communication with the image capturing apparatus and second communication with the interchangeable lens, and a first operation unit configured to accept a predetermined operation related to manual focus operation, the method comprising:

• setting a degree to which a drive amount of a focus lens in the interchangeable lens is made effective relative to an operation amount of the first operation unit;
• accepting the predetermined operation through the first operation unit;
• and
• transmitting the drive amount or a drive speed of the focus lens in the interchangeable lens to the interchangeable lens through the second communication in accordance with the predetermined operation and the degree set.

A non-transitory computer-readable storage medium comprising instructions for performing a method of controlling an accessory apparatus which is removably attached between an image capturing apparatus and an interchangeable lens, wherein the accessory apparatus includes a communication unit configured to perform first communication with the image capturing apparatus and second communication with the interchangeable lens, and a first operation unit configured to accept a predetermined operation related to manual focus operation, the method comprising:

• setting, through a setting unit, a degree to which a drive amount of a focus lens in the interchangeable lens is made effective relative to an operation amount of the first operation unit;
• accepting the predetermined operation through the first operation unit;
• and
• transmitting, through a control unit, the drive amount or a drive speed of the focus lens in the interchangeable lens to the interchangeable lens through the second communication in accordance with the predetermined operation and the degree set.