Hard Carbon Coating 100-500mm f/4.0 objective lens is hard carbon coated for durability System Reliability Thermal system is rated at > 7,500 hours MTBF (mean time before failure)
Rugged & Protected Durable all-weather housing is nitrogen purged for waterproof performance
Defroster for objective lens ensures visibility in dynamic weather conditions Pan & Tilt Head Accuracy - 0.25