A lens apparatus configured to form an image, the lens apparatus comprising a zoom lens unit configured to move for zooming, an aperture stop, a storage storing correction data for obtaining a correction amount for correcting image data, obtained from an image formed by the lens apparatus, with respect to a distribution of a light amount in the image and a communication device configured to transmit the correction data to an external apparatus, wherein the lens apparatus satisfies following inequalities: 1.10 < Ft / Fd < 4.00; and − 0.01 < Fd − Fw / Log fd / fw < 1.20, where Fw represents a minimum F-number at a wide angle end, Ft represents a minimum F-number at a telephoto end, fw represents a focal length of the lens apparatus at the wide angle end, ft represents a focal length of the lens apparatus at the telephoto end, and Fd represents a minimum F-number at a focal length fd expressed by a following expression: fd = Fw / Ft × ft, the correction data includes, for each of a plurality of states of the lens apparatus, a coefficient (A j) of a term of each order of an n-th order polynomial (where n is a non-negative integer) with respect to an image height h, wherein the plurality of states of the lens apparatus correspond to states of the zoom lens unit and the aperture stop, the plurality of states of the zoom lens including at least the states of the telephoto end and the wide angle end; characterized in that the correction data satisfies a following inequality for each image height h: -0. 15 & ≤ dD ' h - dDlens h ≤ 1.98, where dDlens(h) represents a change amount of the light amount at the image height h per an increase amount dh of the image height h, and dD'(h) represents a change amount of an inverse of a value of the n-th order polynomial at the image height h per the increase amount dh, and the correction data satisfies, in a state of the lens apparatus, a following inequality: Ave _ nY / Ave _ 0 n ≤ 0.95, where Ave_0n represents an average of a product of a relative illumination of the image and the correction amount expressed by the n-th order polynomial at each image height from an image height zero to a first image height hn, and Ave_nY represents an average of a product of a relative illumination of the image and the correction amount expressed by the n-th order polynomial at each image height from the first image height hn to a maximum image height Y, and wherein the first image height hn satisfies a following inequality: 0.70 × Y ≤ hn < 1.00 × Y. the lens apparatus satisfies following inequalities: 1.10 < Ft / Fd < 4.00; and − 0.01 < Fd − Fw / Log fd / fw < 1.20, where Fw represents a minimum F-number at a wide angle end, Ft represents a minimum F-number at a telephoto end, fw represents a focal length of the lens apparatus at the wide angle end, ft represents a focal length of the lens apparatus at the telephoto end, and Fd represents a minimum F-number at a focal length fd expressed by a following expression: fd = Fw / Ft × ft, the correction data includes, for each of a plurality of states of the lens apparatus, a coefficient (A j) of a term of each order of an n-th order polynomial (where n is a non-negative integer) with respect to an image height h, wherein the plurality of states of the lens apparatus correspond to states of the zoom lens unit and the aperture stop, the plurality of states of the zoom lens including at least the states of the telephoto end and the wide angle end; characterized in that the correction data satisfies a following inequality for each image height h: -0. 15 & ≤ dD ' h - dDlens h ≤ 1.98, where dDlens(h) represents a change amount of the light amount at the image height h per an increase amount dh of the image height h, and dD'(h) represents a change amount of an inverse of a value of the n-th order polynomial at the image height h per the increase amount dh, and the correction data satisfies, in a state of the lens apparatus, a following inequality: Ave _ nY / Ave _ 0 n ≤ 0.95, where Ave_0n represents an average of a product of a relative illumination of the image and the correction amount expressed by the n-th order polynomial at each image height from an image height zero to a first image height hn, and Ave_nY represents an average of a product of a relative illumination of the image and the correction amount expressed by the n-th order polynomial at each image height from the first image height hn to a maximum image height Y, and wherein the first image height hn satisfies a following inequality: 0.70 × Y ≤ hn < 1.00 × Y.