Focal Length

4mm

25mm

50mm

F/#

1.2

1.0

1.2

Wavelength

8-12μm

8-12μm

8-12μm

Focus Range

0.3m-Infinity

1m-Infinity

Interface

Thread

Thread

Thread

Focus Mechanism

Fixed Athermalized

Manual

Fixed Athermalized

Dimensions

Ø34×29.2

Ø48×33.2

Ø49×55.6

Weight

≤52.6g

140g

<144g

Operating Temperature

-40°C to +60°C

-40°C to +80°C

-40°C to +80°C

Storage Temperature

-45°C to +65°C

-45°C to +85°C

-50°C to +85°C

Front Element Sealing

IP67

IP67

IP67

External Coating

DLC

AR

AR

Format

Ø21.8