25MP 50mm C-Mount Fixed Focal Lens Locking Iris for Print Registration

The K5028-25M is a 50mm fixed focal C-mount lens designed for stations that require a narrow, high-resolution view from a comfortable working distance. Mounted on a 1.1-inch 25MP camera, it covers a 16.15 x 11.85 degree field, resolving small print, registration marks and coating defects while the camera body stays clear of the press or web path. TV distortion of 0.01% at 0.4m ensures registration measurement remains accurate to the edge of the frame.

The lens features a F2.8 to F16 manual iris and a 0.25m to infinity focus ring, both equipped with locking screws so settings survive the vibration of a running press. A 35mm diameter anodised barrel and an M30.5 P=0.5mm filter thread make it easy to add a polariser or bandpass filter for gloss and colour work. Each 25MP fixed focal lens is MTF tested and distortion checked at 0.4m, and verified units ship with an individual test record.

• Print registration and colour bar inspection on web and sheet presses
• Label, barcode and packaging print verification
• Coating, lamination and surface defect review at longer standoff
• Electronics assembly inspection where the camera must clear the fixture
• Glass container and narrow part inspection
• Machine tending cells that need a compact narrow field camera

• Narrow 16 degree field keeps camera bodies clear of press frames and web paths
• 25MP resolution reads fine print, registration marks and small 2D codes in one frame
• 0.01% TV distortion at 0.4m supports true position measurement of registration targets
• Locking iris and focus screws resist press vibration and continuous duty cycles
• M30.5 thread accepts polarisers that remove gloss from coated and laminated stock
• RoHS compliant build with per-unit MTF and distortion records

We supply fixed focal machine vision lens families to printing, packaging and electronics equipment builders in Europe, North America and Asia, with in-house grinding, coating and assembly. The K5028-25M was developed with press manufacturers who needed 25MP detail from a safe standoff. Share your web width, defect size and working distance and our application engineers will confirm the 50mm 25MP fixed focal lens, arrange a sample and quote volume pricing or private labelling.