Focal Length

4mm

15mm

20mm

F/#

1.2

1.0

1.0

Wavelength

8-12μm

8-12μm

8-12μm

Focus Range

0.3m-Infinity

0.3m-infinity

Interface

Thread

Thread

Thread

Focus Mechanism

Fixed Athermalized

Manual

Fixed Athermalized

Dimensions (mm)

Ø34×29.2

Ø25×21.5

Ø32×20.6

Weight

≤52.6g

21.5g

35.1g

Operating Temperature

-40°C to +60°C

-40°C to +60°C

-40°C to +60°C

Storage Temperature

-45°C to +65°C

-50°C to +80°C

-45°C to +65°C

Front Element Sealing

IP67

IP67

IP67

External Coating

DLC

AR

AR

Distortion

<5%