Focal length: 20mm

Joint specification: 1.25 inches (approximately 31.7mm)

Mirror material: metal aluminum

Lens material: optical glass

Lens coating: broadband green film

Thread specification: M28.6X0.6mm

Eye mask type: flip back type

Product volume: 33.5 * 33.5 * 42mm

Net weight: 55g

Gross weight: 77g