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4-90910-20 Lens Double-Concave Glass Lens, 38mm Diameter, 20cm Focal Length. Sold in a Pack of 20 Lenses.

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$24.69

$ 11 .99 $11.99

In Stock
  • The glass lens provides superior optical clarity, lower distortion, and minimal chromatic aberration (color fringing).
  • The lenses are well-made to avoid spherical aberration, where light rays from different parts of the lens don't converge at the same point, resulting in blurry images.
  • This is an affordable, good-quality lenses which performs well for many types of classroom experiments.
  • Great for various lab experiments such as physics demonstrations
  • Sold in a pack of 20 lenses.


This double-concave glass lens is made of polished optical glass. It measures 38mm in diameter and has a focal length of 20cm. Sold in a pack of 20 lenses.


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