40 mm Plano Convex Lens. Focal length (f'): ± 2% @ 587.6nm. Optical Glass Optional LED Plano-convex Lens DIY Focusing Condenser Lens. 40mm 41.36 80mm 74.3 8.7 3.5. 40mm 103.36 200mm 196.4 5.5 3.5. 40mm 180.9 350mm 347 4.6 3.5.
Round Flat Toughened Glass Lens 35-75mm - High Clarity Optical Lens for Mirrors and Projects, 1mm Thickness, 1pc(40MM*5MM)
TGDGFKIAS Glass Prism Optical Glass Lens, 1pc Double Concave Lens Optical Glass K9 Material Diameter 40mm Focal Length -100mm Prism Lens
TGDGFKIAS Glass Prism Optical Glass Lens, 1pc Double Concave Lens Optical Glass K9 Material Diameter 12mm Focal Length -19.3mm Prism Lens
1pc Double Convex Lens Set - 30mm, 36mm, 40mm, 50mm - High Transparency Optical Glass Magnifying Lenses for Clearer Images(40mm*70mm)
1pc Double Convex Lens Set - 30mm, 36mm, 40mm, 50mm - High Transparency Optical Glass Magnifying Lenses for Clearer Images(50mm*130mm)
1pc Double Convex Lens Set - 30mm, 36mm, 40mm, 50mm - High Transparency Optical Glass Magnifying Lenses for Clearer Images(36mm*90mm)
