Radiation-hardened cameras, or lenses thereof, other than those specified in Dual-Use code 6A203.c., specially designed, or rated as radiation-hardened, to withstand a total radiation dose greater than 50 × 103 Gy (silicon) (5 × 106 rad (silicon)) without operational degradation.

In this paragraph, the term Gy (silicon) refers to the energy in Joules per kilogram absorbed by an unshielded silicon sample when exposed to ionising radiation.