Product Description
Premium Optical-Grade Acrylic Positive Meniscus Lens – 2″ (50mm) Diameter, ~18″ Focal Length
Elevate your optical projects with this high-quality positive meniscus lens, crafted from crystal-clear PMMA acrylic for exceptional light transmission, impact resistance, and durability. Whether you’re teaching the fundamentals of optics, building a DIY projector, or exploring creative photography, this lens delivers sharp, distortion-free performance at a fraction of the weight and cost of glass.
🔍 Key Specifications:
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Diameter: 50mm (2 inches)
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Thickness: 7.5mm (robust, rigid, warp-resistant)
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Focal Length: ~18 inches (457mm) – gentle positive power
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Design: Positive meniscus – strongly convex front, very subtle concave rear
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Material: Optical-grade acrylic (PMMA) – lightweight, shatterproof, UV-stable
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Surface Quality: Excellent – pristine; no scratches, grooves, or casting defects
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Edge Finish: Smooth polished edge – ready for custom mounting
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Condition: Like-new surplus – carefully stored
✅ Condition & Notes:
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Condition: Excellent – Pristine Surfaces
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Origin: Surplus from educational or industrial optical stock
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Visual: Completely clean – no haze, crazing, or abrasions
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Includes: Lens only – no handle, frame, or mounting hardware
⚙️ Why This Lens Excels:
🧪 Superior Meniscus Design:
Unlike simple plano-convex lenses, the positive meniscus configuration (convex front + subtle concave rear) minimizes spherical aberration and delivers sharper, more uniform focus across the aperture—ideal for imaging and projection applications.
💎 Optical-Grade Acrylic:
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92% light transmission – nearly equivalent to uncoated glass
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Impact-resistant – will not shatter if dropped
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UV-stable – will not yellow over time
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50% lighter than glass – easier to mount and position
📏 Generous Focal Length:
The ~18-inch focal length provides comfortable working distance for:
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Low-power magnification (1.5–2x) with wide field of view
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Projection optics with manageable throw distance
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Light collection without extreme curvature
🛠️ Applications & Uses:
🔬 Optics Education & Demonstration:
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Teach refraction, focal points, real/virtual images
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Demonstrate chromatic aberration vs. achromats
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Safe, shatterproof option for student labs and outreach
🔍 Low-Power Magnification:
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1.5–2x comfortable viewing of maps, documents, circuit boards, or fine print
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Large 50mm aperture provides wide, bright field of view
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No eye strain – ideal for extended reading or inspection tasks
📽️ DIY Projection & Imaging:
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Condenser lens in overhead or slide projectors
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Objective lens in simple telescopes or viewfinders
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Close-up photography – creative diopter effects
💡 Light Collection & Beam Control:
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Gather light onto sensors, solar cells, or photodiodes
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Soften or spread LED or lamp beams
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Prototype optics for custom instruments
🧰 Maker & Hobbyist Projects:
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Build a smartphone projector or magnifying lamp
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Create a wide-field viewer for birding or nature study
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Experiment with lens combinations for unique effects



