... -520mm76.2mmPX, PV, CV-CXD20-620mm4''PX, PV, CV-CXD20-720mm5''PX, PV, CV-CXD20-820mm7.5''PX, PV, CV-CX Part Nodiameterfocal ... .2mmPX, PV, CV-CXD25.4-625.4mm4''PX, PV, CV-CXD25.4-725.4mm5''PX, PV, CV-CXD25.4-825.4mm7.5 ... ''PX, PV, CV-CX MY20.0-2.0-2 ...