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Set of 50mm (5cm) dia. biconcave and 50mm (5cm) dia. biconvex lenses of various focal lengths (FL), and lens holders.
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 - wooden x 6 (fits 50mm & 75mm lenses).
Lenses stored in handy plastic container.
