Specifications:
Material: K9 optical glass
34mm biconvex lens: Focal length 86mm, Center thickness: 12.1mm, Edge thickness: 8.4mm
40mm biconvex lens: Focal length 123mm, Center thickness: 12mm, Edge thickness: 8.5mm
42mm biconvex lens: Focal length 141mm, Center thickness: 12.2mm, Edge thickness: 8.7mm
52mm biconvex lens: Focal length 200mm, Center thickness: 11.5mm, Edge thickness: 8mm
26mm meniscus lens(one side convex, the other side concave): Focal length 128mm, Center thickness: 6.6mm, Edge thickness: 5.5mm
Manual size measurement, Error value within 0.3mm.
Package includes: 2 x Lens