Focal Length

50mm

45mm

20mm

F/#

1.2

1.1

1.0

Wavelength

8-12μm

8-12μm

8-12μm

Focus Range

40m-Infinity

Interface

Thread

Thread

Thread

Focus Mechanism

Fixed Athermalized

Fixed Athermalized

Fixed Athermalized

Dimensions (mm)

Ø47.8×45.77

Ø51×51.44

Ø32×20.6

Weight

97g

130g

35.1g

Operating Temperature

-40°C to +80°C

-40°C to +60°C

-40°C to +60°C

Storage Temperature

-50°C to +85°C

-50°C to +70°C

-45°C to +65°C

Front Element Sealing

IP67

IP67

IP67

External Coating

AR

DLC

AR