- Thread size: 43 mm (front and back)
- Outer diameter: 45.3 mm
- Frame thickness: 4.9 mm (not including threads) / 6.9 mm (including threads)
- Glass thickness: 2.0 mm
- Glass type: SchottTM B270 optical glass
- Polished: Yes
- Coatings: 12 layers
- Light transmision rate: maximum 87.1% / average 42.9% or about 1.2 f-stops (average at 400 - 700 nm)
- Reflection: less than 0.5% (average at 400 - 700 nm)
- Frame material: Aluminum
- Made in Japan