At least one exemplary embodiment is directed to an imaging apparatus including an image sensor including a light-shielded pixel area, a comparison unit configured to compare a light-shielded pixel output value output from at least a part of the light-shielded pixel area with a plurality of preset determination values, a counting unit configured to count a result of comparison performed by the comparison unit with respect to each of the plurality of determination values, and a calculation unit configured to estimate an amount of dark current generated in the image sensor based on a result of counting performed by the counting unit.