Set of 50mm (5cm) diameter biconcave and 50mm (5cm) diameter biconvex lenses of various focal lengths (FL),lens holders with slot in base for meter rulers. Lenses stored in handy plastic container.
Comprises of:
Biconcave lenses: 6 x FL: 15cm, 6 x FL: 20cm, 6 x FL: 25cm.
Biconvex lenses: 6 x FL: 15cm, 6 x FL: 20cm, 6 x FL: 25cm.
Lens holder x 6
Meter rule x 6