Kowa LM50LF-48 | 46mm Image Circle 50mm Fixed Lens, TFL-II Mount, 4K Line Scan, 7.5μm Pixel, Visible Spectrum (400–800nm)

Quick Overview
50mm TFL-II lens for 4K line scan cameras with 46mm image circle, supports 7.5μm+ pixels, f/2.8–22 manual aperture, 160 lp/mm center resolution, -0.04% distortion, visible spectrum (400–800nm), Ø54 x 106mm size, and 470g weight.

The Kowa LM50LF-48 is a high-performance 50mm fixed focal length lens built for advanced 4K line scan camera systems. With a wide 46mm image circle and optimized support for large-pixel sensors of 7.5μm and greater, this lens is ideal for high-speed inspection, web scanning, and machine vision workflows. It features a TFL-II mount for improved stability with larger sensors, a fast f/2.8–22 manual aperture range, and exceptional resolving power up to 160 lp/mm at center and 63 lp/mm at image margins. The LM50LF-48 delivers low distortion (-0.04%) across a large sensor area, making it perfect for precise, distortion-sensitive imaging.

The lens performs in the visible spectrum (400nm–800nm), supporting full-frame line scan applications requiring maximum optical clarity. It has a field of view of 162.9mm (H) x 108.9mm (V) at the minimum working distance and provides consistent performance from 0.4m to infinity. Designed for industrial reliability, the LM50LF-48 operates across -10°C to +50°C, with a durable build measuring Ø54 x 106mm and weighing just 470g. This lens is a top-tier choice for industrial users seeking ultra-high-resolution, large-format line scan performance.

Features:

  • 50mm fixed focal length lens
  • TFL-II mount for secure large-format sensor use
  • Supports 4K line scan cameras and 7.5µm pixel sensors
  • 46mm image circle for wide sensor coverage
  • Manual iris (f/2.8–22) and manual focus
  • 160 lp/mm center resolution, 63 lp/mm at edge
  • Minimal TV distortion (-0.04%)
  • Optimized for visible spectrum (400–800nm)
  • Durable build, Ø54 x 106mm, 470g
  • Wide temperature range: -10°C to +50°C

Applications:

  • Line scan inspection systems
  • Industrial web inspection
  • Print and label quality control
  • Semiconductor and PCB inspection
  • Large-format machine vision setups
  • Scientific and research imaging
Aperture (F-stop)2.8 - 22
Aperture ControlManual
Back Focus in Air (mm)37.70
Focus ControlManual
Field of View at Min Working Distance (H x V, mm)162.9 x 108.9
Filter Size (mm)M48 x P0.75
Focal Length (mm)50.0
Focus Range (m)0.4 – ∞
Megapixel4K
MountTFL-II
Pixel Size (µm)7.5µm+
Resolution (Center / Margin, lp/mm)160 / 63
Sensor Size46mm Dia.
SeriesLF
Size (mm)Ø54 x 106
TV Distortion (%)-0.04
Operating Temperature (°C)-10 to +50
Type of LensFixed Focal Length
Wavelength RangeVisible (400 – 800nm)
Weight (g)470