The teachings of the present invention include an antenna system for a tire pressure monitoring system. If brightness of an object is not enough, a frame rate of the CCD imager at a time of a focus adjustment is changed from 30 fps to 15 fps. Chamber in which they are contained is communicated with a tank of known volume containing helium at a known pressure. The second layer overlaps the firs layer. Other embodiments relate to films formed from such compositions and to devices, such as electrical, electronic and optoelectronic devices, that encompass such films.