ProMaster 82mm Protection Filter

Thread size: 82mm (front and back)
Outer diameter: 84.9 mm
Frame thickness: 3.4 mm (not including threads) / 5.5 mm (including threads)
Glass thickness: 1.3 mm
Glass type: SchottTM B270 optical glass
Polished: Yes
Coatings: 12 layers
Light transmision rate: 98.2% (average at 400 - 700 nm)
Reflection: less than 0.5% (average at 400 - 700 nm)
Frame material: Aluminum
Made in Japan