2pcs 42mm Diameter K9 Optical Glass Doublet Optics Glass Focal Length Double Convex Lens For DIY Astronomic Telescope Objective

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Mini Pocket 8x20 Monocular

Eyepiece telescope. Zoom optic. 40khz.. Mataveni. Terrycloth headbands. Tripod cell phone. Black frame. Sw-600s. Eye lens diameter: : Sd card. 15x60. 18mm(all optical). Zoom variable. Wholesale canon 20x50 binoculars. Fitting diameter: 1.25-inch / 31.7mm: Fmc antireflection green film. 

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Magnifier Transparent Credit Card

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Micrometer Stage Calibration

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