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

25mm DG Series Fixed Focal Length Lens

25mm Focal Length, #55-326

25mm Focal Length, #55-326

Stock #55-326
Qty 1-49
Qty 50
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Focal Length FL (mm):
Maximum Sensor Format:
Horizontal Field of View @ Max Sensor Format:
142.9mm - 31.6°
Aperture (f/#):
f/4 - Closed
Working Distance (mm):
240 - ∞
λ/4 MgF2
Distortion (%):
<0.3 @ 400mm WD
Horizontal Field of View, 1.1" Sensor:
142.9mm - 31.6°
Horizontal Field of View, 1" Sensor:
128.8mm - 28.7°
Horizontal Field of View, 1/1.8" Sensor:
72.3mm - 16.4°
Horizontal Field of View, 1/2" Sensor:
64.2mm - 14.6°
Horizontal Field of View, 1/2.5" Sensor:
58.2mm - 13.2°
Horizontal Field of View, 1/3" Sensor:
48.2mm - 10.9°
Horizontal Field of View, 1/4" Sensor:
36.1mm - 8.2°
Horizontal Field of View, 2/3" Sensor:
88.4mm - 19.9°
Filter Thread:
M30.5 x 0.5 (Female)
Primary Magnification PMAG:
0X - 0.106X
Iris Option:
Fixed Focal Length Lens
Weight (g):

Regulatory Compliance

RoHS 2015:
REACH 201:

Product Family Description

  • Double Gauss (DG) Design for Low Distortion, <0.3%
  • Supports Up to 4/3" Sensors
  • Low-Profile Static Housing for Machine Integration
  • Ideal for High Resolution Cameras

TECHSPEC® 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® 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.

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