Imaging apparatus and method for controlling imaging apparatus including limited range determination

A method for controlling an imaging apparatus executed by a processor, wherein

• the imaging apparatus is an imaging apparatus to which an interchangeable lens is attachable via a teleconverter, the imaging apparatus comprising:
• a camera body including an imaging element and a display panel;
• and
• the interchangeable lens including a lens, a zoom ring that varies position of the lens, and a zoom encoder that detects information on zoom position of the zoom ring,
• the method comprising:
• determining whether the teleconverter is attached to the interchangeable lens;
• calculating the zoom position based on information detected by the zoom encoder;
• determining whether the zoom position is within a limited range in which optical performance deteriorates if the teleconverter is attached to the interchangeable lens;
• and
• changing information displayed on the display panel if the zoom position is within the limited range.