Compare Model Drawings, CAD & Specs Availability Price
SWIR & NIR 25-250mm f/5.5 (NFOV) f/4.0 (WFOV)
NIR & SWIR band 0.7-1.7µm
SWIR & NIR 25-250mm f/5.5 (NFOV) f/4.0 (WFOV)
SWIR band 1.1-1.7µm

WFOV (25mm)

Pitch 640x512 1280x1024
15μ 21.7° NA
10μ 14.6° 28.7°
7.3° 14.6°

NFOV (250mm)

Pitch 640x512 1280x1024
15μ 2.2° NA
10μ 1.5° 2.9°
0.7° 1.5°


  • Type
    Continuous Zoom
  • Focal Length
  • F/#
  • Avg.Trns.
  • Back Focal Length
    34.47mm in air (±0.1)
  • Focus Mechanism
    Motorized. Adjustable
  • Focus Range
    WFOV:2m NFOV:20m
  • Focus Time
  • Weight
  • Minimum Focus Range
  • Dimensions
    Ø65mm x 214mm
  • Operating Temperature Range
    -32ºC to +75ºC
  • Storage Temperature Range
    -40ºC to +80ºC
  • Sealing
    IP67 front element only
  • Zoom Time
  • Communication Interface
  • Drive Voltage
  • Current Consumption
    <0.5A (max)
  • Wavelength Region
  • Back Working Distance
    17.5 mm


SWIR & NIR 25-250mm f/5.5 (NFOV) f/4.0 (WFOV) Detection, Recognition & Identification (DRI) Range

DRI ranges enable one to easily estimate the maximum range that an object can be either detected, recognized or identified. It is important to note that these estimates are based solely on geometrical parameters – the target size, distance, lens focal length and camera detector pixel size. Signal level, detector sensitivity, atmospheric conditions and other factors are not considered!

The calculations used here are based on the “Johnson Criteria”. According to the Johnson Criteria, the minimum resolution, pixels on target, required to achieve a 50% probability for an observer to discriminate an object are:

  • Detection: An object is present – 2 pixels on target (Lower Bar)
  • Recognition: discern the type of object, a human vs. a vehicle – 8 pixels on target (Middle Bar)
  • Identification: discern specific objects, a man vs. a woman, a car model – 12.8 pixels on target (Upper Bar)

SWIR NIR 25-250mm f/5.5 (NFOV) f/4 (WFOV): Low-SWaP, Long-Range, Cont. Zoom for 5µm pixel detectors

Contact Us illustration

Have questions? Require assistance?

Click below to to contact Ophir IR Optics and we'll get back with you shortly.

Contact Ophir IR Optics