Focal Length:       110mm

Diameter:            79mm

Edge Thickness:   6.5mm

Anti-reflection Coating:  Yes

Positive meniscus (convex-concave) lenses are designed to minimize spherical aberration. When used in combination with another lens, a positive meniscus lens will shorten the focal length and increase the numerical aperture (NA) of the system without introducing significant spherical aberration. When used to focus a collimated beam, the convex side of the lens should face the source to minimize spherical aberration.