Focal Length

4.3mm

20mm

13mm

F/#

1.2

1.1

1.0

Wavelength

8-12μm

8-12μm

8-12μm

Interface

Thread

Thread

Thread

Focus Mechanism

Fixed Athermalized

Fixed Athermalized

Fixed Athermalized

Dimensions (mm)

Ø39×19.6

Ø29×25.5

Ø23×15.5

Weight

43.2g

≤32g

≤21.5g

Operating Temperature

-40°C to +60°C

-40°C to +80°C

-40°C to +60°C

Storage Temperature

-45°C to +65°C

-45°C to +85°C

-45°C to +65°C

Front Element Sealing

IP67

IP67

IP67

External Coating

AR

AR

AR/DLC

Focus Range

1m-Infinity