Specifications
Focal Length: 0.5 inches (12 mm)
Diameter: 0.6 inches (15 mm)
Center thickness: 0.2 inch (5.5 mm)
Back Focus Fb: 0.3 in (8.4 mm)
Back shape: flat
Tolerance of close axis focal length (f): ±7%
Tolerance of center thickness (tc): ±7% (±0.5mm max)
Manufacturing Method: casting method (molded lenses)
Scratch & Dig: 80-50
Maximum Operating Temperature: 397°F (177°C).
Diameter Tolerance: ±0.02 in (0.5 mm)
Effective diameter: 80% (center)
Design Wavelength: 546.1 nm
Material: Optical crown glass.
Features
Special lenses provide an extremely short focal length compared to the aperture, and will not produce spherical aberrations even when used in full aperture of the lens.