The Vixen Optics Report Tripod for Porta II Mount Head is designed to fit the Vixen Optics Porta II Head. This combination is a must for the serious astronomer. The light metal mounting head fits the Vixen Optics Porta II Head. The Vixen Optics Report Wood Tripod makes a very stable combination with the Porta II mount (sold separately), with excellent vibration damping. The Report Tripod 's legs have no fixed angle stop. Leg spread is limited by triangle tray and steel chain, both included with the tripod.