The LDC-3 is a universal collimating lens system that fits 5.6mm diameter base diodes. The laser diode press fits in the back of the lens assembly. The lens can be adjusted with a small spanner wrench or flat blade screwdriver.

Specifications:

Lens type: Single element Acrylic
Focal length: .315″  (8mm)
Numerical aperture: .28
Beam diameter: .165″ (4.2mm)
Base material: Brass
Dimensions: 0.57″ (14.5mm) long  x .414″ (10.5mm) diameter.