product description:
(2) Pack of Full Page Fresnel Lens Magnifying Sheets made by OpticLens. Excellent for reading fine print in books, magazines, maps, telephone directories and recipes. They also work great for use in light duty solar projects such as starting campfires, DIY solar cooking, solar heaters as well as DIY Big Screen Projector Kits. As with any magnifying sheet, they need to be elevated at least several inches above the page in order to magnify. They are made from flexible high quality optical grade PVC. This allows them to be thinner with less distortion and lightweight and easy to hold. Optical PVC is virtually shatterproof for safety and peace of mind. Lens Specifications: 7.00" x 10.25" (Inches). Thickness: 0.4mm. Weight: 26 grams. Material: optical PVC. Groove pitch: 0.3mm. Focal length: 300mm. Magnification: 3X. Quantity (2 lenses per pack).
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