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Omron / Sentech 3Z4S-LE SV-2514V machine vision lens
Omron / SentechC-mount lenses
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Omron / Sentech SV-2514V 25mm C-Mount Lens (SV-V Series)

3Z4S-LE SV-2514V

The Omron 3Z4S-LE SV-2514V is a compact fixed focal length C-mount lens with a 25 mm (actual 25.17 mm) focal length and F1.4 maximum aperture, part of the SV-V series manufactured by VS Technology as OEM for Omron. It supports sensors up to 1" format and delivers TV distortion of only -0.33% at the 2/3" image circle, making it suitable for high-accuracy inspection tasks. The manual iris and focus design features lock screws for stable operation, with a minimum object distance of 500 mm. The compact body measures Ø29.5 × 24.5 mm and weighs approximately 36 g, with a 17.526 mm flange back distance and M27 P=0.5 filter thread.

Brand
Omron / Sentech
Focal length
25 mm
Lens mount
C-mount
Aperture (f-number)
F1.4 ~ Close
Image circle / max sensor
1" (max sensor size)
Telecentric
No
Working distance
500 mm ~ ∞
Dimensions
Ø29.5 (max) × L=24.5 mm
Weight
36 g
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Technical overview

The Omron 3Z4S-LE SV-2514V is a fixed 25 mm C-mount lens — the actual measured focal length is 25.17 mm — drawn from VS Technology's SV-V series and supplied as an Omron OEM part. Its F1.4 maximum aperture is among the fastest available in a compact C-mount body, which matters directly on the factory floor: a wide aperture lets you close down the iris to gain depth of field for slightly uneven targets without starving the sensor of light. For installers pairing this with area-scan cameras on 2/3" sensors, the rated TV distortion of only -0.33% at that image circle is the headline specification — barrel distortion at that level is well within the correction budget of most machine-vision software, meaning dimensional measurements and straight-edge inspections do not require heavy post-processing to compensate for lens geometry. Sensors up to 1" format are covered, so the lens can also be mounted on higher-resolution 1" CMOS cameras without vignetting, though the -0.33% distortion figure applies specifically to the 2/3" circle.

At 29.5 mm diameter and 24.5 mm body length with a 36 g mass, the SV-2514V fits easily on compact camera housings and imposes negligible moment load on pan-tilt stages or robot wrists. The 17.526 mm flange back matches the standard C-mount register, so no adapter is required on any native C-mount camera body. The minimum object distance is 500 mm; below that, image quality and focus accuracy degrade, so applications requiring sub-500 mm working distances need either a close-up ring (which shifts the flange back) or a different optical design. The M27 P=0.5 filter thread on the front barrel accepts standard machine-vision bandpass, polarising, or IR-cut filters without a step-up ring, keeping the optical train simple. Manual iris and focus controls are each secured with a lock screw, an important detail for vibration-prone installations: once the production line is characterised and the iris set to the chosen f-stop, both controls can be locked so repeated shock or vibration does not drift the aperture or focal plane between maintenance windows.

Because this is a conventional non-telecentric design, the perspective projection means that object height measurements are slightly affected by object-to-lens distance variation. For gauging applications that require depth-independent magnification — measuring part width regardless of height variation — a telecentric lens would be the architecturally correct choice. However, for surface inspection, OCR, code reading, and defect detection where the target is nominally planar and at a fixed working distance, the 25 mm focal length delivers a field of view well suited to area-scan cameras on 2/3" and 1" sensors. At 500 mm working distance, the large field of view covers wide inspection zones suitable for label text, datamatrix codes, and surface blemish detection at moderate throughput speeds. The lens is compatible with both machine-vision and CCTV camera bodies sharing the C-mount standard, widening the pool of compatible cameras across Omron's own camera families as well as third-party area-scan bodies.

Best for

  • Surface and label inspection on 2/3" or 1" area-scan cameras at working distances of 500 mm and beyond, where low barrel distortion (-0.33%) preserves edge geometry for defect calls without software correction overhead.
  • Industrial OCR and 2D datamatrix / barcode reading on flat targets at fixed working distances, leveraging the F1.4 aperture to achieve short exposure times that freeze label or web motion.
  • Packaging and pharmaceutical line inspection where the compact 29.5 × 24.5 mm body and 36 g mass allow integration into tight enclosures or robotic end-effectors with a C-mount camera.
  • General-purpose dimensional gauging of nominally flat parts on 1" high-resolution sensors, where the full 1" image circle avoids corner vignetting on cameras with larger sensor formats.
  • Machine-vision retrofits onto existing C-mount camera infrastructure — the standard 17.526 mm flange back and M27 filter thread allow drop-in replacement of aging lenses with no mechanical rework.

Selection notes

  • Working distance floor: the 500 mm minimum object distance is a hard constraint. Installations closer than 500 mm will not achieve sharp focus at infinity-corrected register — budget for a close-up (extension) ring or select a macro-capable lens if your standoff is shorter.
  • Sensor format ceiling: the 1" image circle supports sensors up to 1". Cameras with sensors larger than 1" (e.g. 4/3" or APS-C format) will exhibit vignetting at the corners, which can trigger false rejects in intensity-based inspection algorithms.
  • Aperture locking for vibration environments: the manual iris lock screw should be tightened and confirmed with a torque marker after characterisation. On conveyor lines with repetitive impulse loads, an unlocked iris can shift exposure over time, drifting grey-level thresholds.
  • Filter compatibility: the M27 P=0.5 thread directly accepts standard 27 mm machine-vision filters. If your lighting scheme uses a narrow-band LED with a matching bandpass filter, verify the filter's thread pitch matches M27 × 0.5 before ordering.
  • Non-telecentric geometry: this lens is not telecentric, so object-plane height variation causes magnification shift. For tight dimensional tolerances on parts with height variation greater than a few millimetres, evaluate whether measurement uncertainty from parallax is within budget, or specify a telecentric lens instead.

Specifications: General
BrandOmron / Sentech

Specifications: Optical
Focal length25 mm
Lens mountC-mount
Aperture (f-number)F1.4 ~ Close
Image circle / max sensor1" (max sensor size)
TelecentricNo
Working distance500 mm ~ ∞

Specifications: Mechanical
DimensionsØ29.5 (max) × L=24.5 mm
Weight36 g

Frequently asked questions

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