A digital camera has an outside light AF and a contrast type AF which is capable of selecting either outside light AF or contrast type AF based on a command for an operation by a photographer, and has a photographing mode which carries out a focusing by the contrast type AF even when the outside light AF is selected by the command for the operation by the photographer. Thus, the paint brush assembly has a two-stage anti-reverse effect, so that the paint contained in the container can be supplied into the barrel conveniently and can be supplied into the connecting pipe conveniently. Preferably, the composition comprises both an organotitanate or zirconate and a strong acid. In the method, at least one header part is transmitted after the information part. The PC can emulate any desired device or even multiple devices at the same time.