Provided is a lens apparatus including: a lens; detectors configured to detect temperatures at a plurality of mutually different positions of the lens apparatus, respectively; and a processor configured to obtain a change amount of a temperature per unit time with respect to each of the plurality of mutually different positions based on each of the detected temperatures and a time at which each of the detected temperatures is obtained, to estimate a temperature of the lens based on the change amount with respect to each of the plurality of mutually different positions.