Exchangeable lens and camera system

摘要: An exchangeable lens detachably mounted at a camera body includes: an optical characteristics storage unit; information generation and transmission unit. Peripheral shading for only some image heights is stored as the pertaining to peripheral of into unit, but least one height position among five positions equivalent integral multiples y 1, which represents equal ⅙ measured from center substantially rectangular capturing range four corners range, obtained by multiplying 1 integers in 2 through 6, not