DESCRIPTION :-
• Exact Focal Length, Dia 2" Concave Lens (Exact)Focal length 10 cm
• Exact Focal Length, Dia 2" Concave Lens (Exact)Focal length 15 cm
• Exact Focal Length, Dia 2" Concave Lens (Exact)Focal length 20 cm
• Material: Glass
• Type: Concave
• Shape: Round
• Chemical resistant
• Heat resistant
• With Different Focal Length
• Spherical, optically worked glass, with ground edges, highly polished
• High quality lenses for lab or home use.
• Perfect for the study of light principles