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, the method comprising:

• accepting a predetermined operation for operating a predetermined function that assists an autofocus (AF) operation by the image capturing apparatus;
• and
• implementing the predetermined function with respect to the AF operation by controlling transmission of a control command to the interchangeable lens through the second communication based on the predetermined operation and the control command for the AF operation accepted from the image capturing apparatus through the first communication,
• wherein to control the transmission of the control command to the interchangeable lens, in the implementing, a control amount included in the control command and pertaining to focus for the AF operation is not transmitted to the interchangeable lens, or the control amount is changed and transmitted to the interchangeable lens, in accordance with the predetermined operation.

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, the method comprising:

• accepting a predetermined operation for operating a predetermined function that assists an autofocus (AF) operation by the image capturing apparatus;
• and
• implementing the predetermined function with respect to the AF operation by controlling transmission of a control command to the interchangeable lens through the second communication based on the predetermined operation and the control command for the AF operation accepted from the image capturing apparatus through the first communication,
• wherein to control the transmission of the control command to the interchangeable lens, in the implementing, a control amount included in the control command and pertaining to focus for the AF operation is not transmitted to the interchangeable lens, or the control amount is changed and transmitted to the interchangeable lens, in accordance with the predetermined operation.