1. An image capturing system comprising: a plurality of image capturing apparatuses; and an information processing apparatus that controls the plurality of image capturing apparatuses, wherein each of the plurality of image capturing apparatuses comprises: a memory storing a program; and a processor that executes the program to function as a target noise amount specifying unit that acquires a target noise amount as a noise amount that is targeted; and an image capturing parameter determination unit that determines image capturing conditions based on the target noise amount, where said image capturing conditions are specified by one or more image capturing parameters, and the information processing apparatus comprises: a memory storing a program; and a processor that executes the program to function as a noise amount range determination unit that determines a range that can be taken by a noise amount in each image capturing apparatus; a common area calculation unit that calculates a common range of a noise amount common to the plurality of image capturing apparatuses; and a target noise amount determination unit that determines a target noise amount from the common range of the noise amount.