ILLUMINATION APPARATUS HAVING FIRST CASE AND SECOND CASE ROTATABLE RELATIVE TO FIRST CASE, AND IMAGING APPARATUS HAVING DETACHABLE ILLUMINATION APPARATUS

摘要

A setting unit sets a smaller limitation angle for rotation of a second case rotated by a driving unit relative to a first case when information output from a sensor disposed in a back surface of a first case indicates that an object does not exist in a certain range when compared with a case where the information output from the sensor indicates that an object exists in the certain range.