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Price: $6.49
(as of May 12, 2026 09:29:46 UTC – Details)
B0FCG6Y96W, About The 21mm Double Convex Lens
Material: PMMA (Acrylic ); Shape: Double Convex,biconvex lens; Lens; Color: Transparent;
Size:
Outer Diameter: approx. 20.8mm/0.82inch; Lens Height: 3mm/0.12inch; Focal Length:41mm; Epitaxial thickness: 1mm/0.04inch
Advantage:
Made of PMMA (Acrylic) material,High-transparency, low-dispersion for sharp image projection.not easy to age,The beam spots irradiated through the optical lens are uniform,scratch-resistant edges for safe handling., without black holes, shadows, or dark areas.Resistant to wear and suitable for repeated use in classrooms or…, 5,
Reviewer: Lab-Coat-Reviews
Rating: 5.0 out of 5 stars
Title: Acrylic Lenses – 25mm Diameter – 50mm Focal Length – Great for spectral sensor experiments!
Review: This is a package of five acrylic plastic double convex lenses with a 25mm diameter and a focal length of 50mm. These are perfect for spectral sensor experiments. The photos show one of the lenses focused on a SparkFun AS7343 thirteen channel spectral sensor reading the color spectrum of the red flashlight case.Pros: The lenses are crystal clear acrylic plastic. Each lens is individually wrapped to prevent scratches. The lens focuses at 50mm as expected. The lenses are very reasonably priced.Cons: The lenses are acrylic plastic and can be scratched easily, but that is as expected.Overall: Recommended for hobbyists and experimenters!
Reviewer: informedconsumer
Rating: 4.0 out of 5 stars
Title: STEM worthy
Review: They worked for a STEM project for 3rd graders
, Industrial & Scientific > Science Education > Optics, #Double #Convex #Lens #21mm #Diameter #41mm #Focal #Length #Optical #biconvex #Lens #for..,
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