Kowa LM25JC – 25mm F/1.6 Compact Lens

Kowa LM25JC – 25mm F/1.6 Compact Lens

25mm F/1.6 lens compatible with 2/3 Format sensor and 1/2 or 1/3 Format sensors with a reduced field of view. C-Mount compatible.


18 Month Extended Warranty
Purchase a participating product and if it fails under normal use within 18 months, we'll ship you a replacement free of charge.
Look for the 18 Month Warranty Gold Seal for participating products.

Product Description

25mm F/1.6 Machine Vision Lens

The Kowa LM25JC is a 25mm F/1.6 lens designed for machine vision applications.  It features two (2) locking screws for aperture and focus rings to secure settings in dynamic environments.  Although designed for 2/3 Format sensors, it is also compatible with 1/2 and 1/3 Format sensor with a reduced field of view.  The lens features a standard C-Mount.

Kowa LM25JC Dimensions

Kowa LM25JC Details
Focal Length25mm
Focal Length Sort Order25
Lens TypeFixed Focal Length
Image Size2/3" (8.8 x 6.6 x 11mm)
Iris Range (F-Stop)F1.6 - 16
Angle of View 1/2" (Hor. x Ver. x Dia.)15.3 x 11.4 x 19.1°
Angle of View 1/1.8" (Hor. x Ver. x Dia.)17.2 x 12.9 x 21.5°
Angle of View 2/3" (Hor. x Ver. x Dia.)21.0 x 15.7 x 26.3°
TV Distortion-0.60%
Minimum Object Focus Distance (1/2") (Hor. x Ver. x Dia.)52.0 x 38.9 x 65.3mm
Minimum Object Focus Distance (1/1.8") (Hor. x Ver. x Dia.)58.7 x 43.8 x 73.8mm
Minimum Object Focus Distance (2/3") (Hor. x Ver. x Dia.)72.1 x 53.7 x 91.1mm
Focusing Range0.2m
Flange Back17.526mm in air
Back Focus10.3mm in air
Filter Thread SizeM27x0.5
Front/Rear Effective DiameterFront Φ14.6mm / Rear Φ10.7mm
Exit Pupil Location-28.6mm
Temperature Range-10°C ~ +50°C
Storage Temperature Range-20°C ~ +60°C
Resolution: Center/CornerCenter 100lp/mm / Corner 40lp/mm
Original specifications were posted on
Kowa JC Series BrochurePDF1.1MDownload File
LM25JC DatasheetPDF123kDownload File
LM25JC CAD DrawingDXF206kDownload File