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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
50mm Focal Length, LF Series Fixed Focal Length Lens

50mm Focal Length, #85-203

50mm Focal Length, #85-203

Stock #85-203
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Focal Length FL (mm):
Maximum Sensor Format:
Horizontal Field of View @ Max Sensor Format:
362.7mm - 39.9°
Aperture (f/#):
f/2 - f/22
Working Distance (mm):
500 - ∞
λ/4 MgF2
Distortion (%):
Horizontal Field of View, 35mm Sensor:
362.7mm - 39.9°
Horizontal Field of View, APS-H Sensor:
292.9mm - 32.7°
Horizontal Field of View, APS-C Sensor:
223.8mm - 25.3°
Horizontal Field of View, 4/3" Sensor:
223.8mm - 25.3°
Horizontal Field of View, 1.1" Sensor:
141.4mm - 16.2°
Horizontal Field of View, 1" Sensor:
127.4mm - 14.6°
Horizontal Field of View, 1/1.8" Sensor:
71.6mm - 8.2°
Horizontal Field of View, 1/2" Sensor:
63.6mm - 7.3°
Horizontal Field of View, 1/2.5" Sensor:
57.6mm - 6.6°
Horizontal Field of View, 1/3" Sensor:
47.7mm - 5.5°
Horizontal Field of View, 1/4" Sensor:
35.8mm - 4.1°
Horizontal Field of View, 2/3" Sensor:
87.5mm - 10.1°
Filter Thread:
M43 x 0.75 (Female)
Length (mm):
Maximum Diameter (mm):
Maximum Rear Protrusion (mm):
Number of Elements (Groups):
7 (5)
Numerical Aperture NA, Object Side:
Fixed Focal Length Lens
Weight (g):

Regulatory Compliance


Product Family Description

  • Covers Large Format (LF) Sensors up to 43.3mm Diagonal
  • F-Mount Compatible
  • Compatible with 2k – 8k Line Scan Cameras and Mid-Sized Area Scan Arrays
  • Multiple Focal Length Options Available

TECHSPEC® LF Series Fixed Focal Length Lenses are designed for use with 2k, 4k, 6k, and 8k line scan cameras and mid-sized area scan arrays. Optimized for machine vision working distances, LF Series lenses feature high resolving powers to easily detect small defects. Additionally, these lenses also feature a lockable focus and iris, which is ideal for factory automation applications where vibrations can cause performance decreases. TECHSPEC® LF Series Fixed Focal Length Lenses are ideal for use in machine vision, web inspection, sorting, and identification applications.

Note: 28mm focal length does not work on all F-mount cameras. Camera F-mount must have an inner diameter greater than 42mm.

Technical Information

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