- Thread size: 43 mm (front and back)
- Outer diameter: 45.8 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