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3.5mm C Series VIS-NIR Fixed Focal Length Lens

3.5mm C Series VIS-NIR Fixed Focal Length Lens, #39-937

3.5mm C Series VIS-NIR Fixed Focal Length Lens, #39-937

Stock #39-937
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Focal Length FL (mm):
Maximum Sensor Format:
Aperture (f/#):
f/2 - f/11
Working Distance (mm):
0 - ∞
Coating Specification:
425 - 1000nm BBAR
Field of View, 1/1.8" Sensor:
41.2mm - 102.8°
Field of View, 1/2" Sensor:
34.1mm - 94.1°
Field of View, 1/2.5" Sensor:
29.5mm - 87.2°
Field of View, 1/3" Sensor:
23.0mm - 74.4°
Field of View, 1/4" Sensor:
16.3mm - 57.4°
Filter Thread:
M105 x 1.0 with required adapter #89-848
Front Thread:
M50 x 0.5 (Male)
Length (mm):
Number of Elements (Groups):
8 (7)
Numerical Aperture NA, Object Side:
Outer Diameter (mm):
Fixed Focal Length Lens
Weight (g):

Regulatory Compliance


Product Family Description

  • Designed for True Factory Automation
  • Supports up to 2/3” Sensors
  • Large Maximum Aperture
  • Low Lens-to-Lens Variation

TECHSPEC® C Series VIS-NIR Fixed Focal Length Lenses are designed for use in machine vision applications that require NIR or VIS-NIR performance, with the working distance and resolution requirements of factory automation and inspection in mind. Featuring large maximum apertures and a Broadband Anti-Reflection (BBAR) coating designed out to 1000nm, these high performance lenses can be used in even the most restrictive lighting conditions. TECHSPEC® C Series VIS-NIR Fixed Focal Length Lenses are manufactured to a high tolerance, resulting in greater levels of imaging performance and low lens-to-lens variation, assuring simple installing into multiple systems. By combining high optical performance, industrial features, and small package size, the C Series VIS-NIR lenses represent a new standard in factory automation optics.

Also available with a VIS Broadband Anti-Reflection (BBAR) Coating.

Note: For IR imaging alone, #65-796 UV-VIS Cut Filter threads directly onto the M25.5 x 0.5 front filter thread of each lens.

Technical Information

Focal Length A B C D
16mm 33.0mm 40.5mm 33.0mm 1.0mm
25mm 31.0mm 30.5mm 31.0mm 1.3mm
35mm 33.0mm 41.0mm 33.0mm 0mm
50mm 35.8mm 53.7mm 35.8mm 2.85mm

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