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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

18mm DG Series Fixed Focal Length Lens

18mm Focal Length, #54-857

18mm Focal Length, #54-857
Stock #54-857
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Qty 50+
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Focal Length FL (mm):
Maximum Sensor Format:
Aperture (f/#):
f/4 - f/12
Working Distance (mm):
210 - ∞
Maximum Image Circle (mm):
Numerical Aperture NA, Object Side:
Entrance Pupil Position (mm):
Exit Pupil Position (mm):
Object Space Principal Plane (mm):
Image Space Principal Plane (mm):
Primary Magnification PMAG:
Field of View at Max Sensor Format:
Horizontal: 159.2mm - 38.5°
Vertical: 118.8mm - 29.3°
Diagonal: 200.1mm - 47.2°
Horizontal Field of View, 1" Sensor:
159.2mm - 38.4°
Horizontal Field of View, 2/3" Sensor:
108.7mm - 26.8°
Horizontal Field of View, 1/1.8" Sensor:
88.8mm - 22.0°
Horizontal Field of View, 1/2" Sensor:
78.8mm - 19.6°
Horizontal Field of View, 1/2.5" Sensor:
70.2mm - 17.5°
Horizontal Field of View, 1/3" Sensor:
59.2mm - 14.8°
Horizontal Field of View, 1/4" Sensor:
44.4mm - 11.1°
Maximum Distortion (%):
Coating Specification:
λ/4 MgF2
Filter Thread:
M30.5 x 0.5 (Female)
Length (mm):
Maximum Diameter (mm):
Maximum Rear Protrusion (mm):
Number of Elements (Groups):
6 (4)
Iris Option:
Fixed Focal Length Lens
Weight (g):

Regulatory Compliance

RoHS 2015:
REACH 201:

Product Family Description

  • Lowest Distortion TECHSPEC® Lens (0.3% or Less Distortion)
  • Up to 9 MegaPixels,  2.8μm Pixel Size Sensors
  • Up to 4/3", C-Mount Lens
  • 18mm to 75mm Focal Length

TECHSPEC® 4/3" DG Series Fixed Focal Length Lenses utilize a Double Gauss design to provide high-performance, low distortion, compact size, and exceptional value, while exceeding the performance of typically available fixed focal length lenses. These lenses feature a mechanical design that allows the focusing movement to be motorized by the user, yields image resolution greater than 100 lp/mm, and have a standard C-Mount. For most applications, the camera-lens combination can be attached to workstations using the ¼-20 mount provided on the camera. TECHSPEC® 4/3" DG Series Fixed Focal Length Lenses include focus ring, manual iris, and set screws to facilitate a low profile integration in machine vision applications. Typical applications for the DG Series lenses include machine vision, assembly-line integration, and measurement and image analysis.

Note: Industrial Boom Stands are recommended for building vibration-free workstations.