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Diameter: 30mm. Focal length: 13/15/20/30/50mm. Grain pitch: 0.3mm. Shape: Round.
Fresnel lenses are concentric circles on the front and smooth surfaces on the back, with a regular thickness of 2mm and edges as thick as the center (not convex anywhere, not convex lenses!!).
Our microscope accessories are made of high-quality materials to ensure durability and stability. Meet your various experimental needs.
We promise to provide every customer with high-quality after-sales service. If you have any questions or need help, we will serve you wholeheartedly 24 hours a day.

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Specification:
1) Diameter: 30mm.
2) Focal length: 13/15/20/30/50mm.
3) Thickness: 2mm.
4) Grain pitch: 0.3mm.
5) Shape: Round.
6) Material: acrylic.
7) Production process: cold forming.
8) Transmittance: 93%.
9) Use temperature: -40 degrees -80 degrees.

Please note:
1) Fresnel lenses are concentric circles on the front and smooth surfaces on the back, with a regular thickness of 2mm and edges as thick as the center (not convex anywhere, not convex lenses!!).
2) Fresnel lens and convex lens are the same in function, but the two shapes are completely different, please pay attention to the distinction.

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