SK120/48X-1800NIR NIR 37.5–1800 mm Motorized Zoom Lens — 120 mm Clear Aperture

120 mm clear aperture 48× zoom 1800mm near-infrared motorized zoom lens technical specifications

I. Product Model

Model: SK120/48X-1800NIR

Name: 120 mm clear aperture 48× zoom 1800mm near-infrared motorized zoom lens

Data Release Date: July 1, 2026

II. Main Optical Specifications

Focal Length Range (mm): f37.5 - 1800

Zoom ratio: 48×

Image size: Φ20mm (adapted to 1.25" sensor)

Relative aperture: F7.2 (wide-angle end) - F15 (telephoto end)

Spectral response: 700nm - 1100nm

Spectral transmission peak: 700nm-1100nm

III. Imaging performance indicators

Pixel definition: ≥3.75μm

Maximum resolution: 8 MP (based on 1.25" image sensor format)

Optical-axis stability: ≥5 pixels (based on 4μm pixel pitch)

IV. Control system

Zoom mode: motorized zoom/preset zoom

Zoom time: shortest focus to longest focus conversion time ≤ 18s (normal temperature)

Focus mode: motorized focus/auto focus/fixed focus

Focusing time: Auto focus mode: ≤3s; Fixed focus mode: No need to adjust the focus throughout the zoom process, the whole process is clear

Back-focus adjustment: ±0.5 mm

Position feedback: magnetic encoder

Feedback accuracy: ±5%

Power supply: DC12V,<10W

Data interface: RS422 full-duplex communication

V. Structural design

Mechanical interface: standard C-mount (custom interfaces available)

Overall dimensions (mm): including bracket: 520×175×139

Weight (kg): ≤6.7 (bare lens); ≤8.2 (including motor); ≤10 (including electronic control cabin)

VI. Environmental Specifications

Shock resistance: GJB150.18A-2009

Vibration resistance: GJB150.16A-2009

Working temperature: -40℃ - +60℃

VII. Optional Functions

Filter system: motorized 2/3/4-position switching

Technical support

Contact person: Dong You

Phone / WeChat: 13331697285

Email: xianglongduan1998@gmail.com