https://www.bhphotovide
Specs:
SCHOTT Extra Low-Dispersion Glass
Schmidt-Pechan Roof Prism Design
Zeiss Hydrophobic Multicoated Optics
Wide Angle Viewing: 56°
Nitrogen-Filled Fogproof/Waterproof
5.25 ft Close Focus Distance
Closed Bridge Configuration
Center Focus Wheel
Tripod Adaptable
Twist-Up Rubber Eyecups