RT831W

● Fitaovana: SS (18/0 na 18/8)

● Antsoy ny tarehy: Φ83.1mm

● Temp. Habe: -30 hatramin’ny 21°C/-20 hatramin’ny 70°F

● Fahamarinana: ±2.5%

● Miaraka amin’ny fihantonana fanantonana face miankavia na miankavanana

● Lens vera mirefarefa