150mm BK7 plano-convex lens

Product Description

150mm Diameter BK7 Plano-Convex Lens – 250mm Focal Length (f/1.67)

This large-format, fast-aperture plano-convex lens is crafted from high-quality BK7 optical glass and is in flawless, like-new condition. With a 150mm clear aperture and a 250mm focal length (f/1.67), it delivers exceptional light-gathering power for a wide range of optical projects—from serious DIY astronomy to high-intensity beam control.

Key Specifications:

• Diameter: 150 mm (≈6 inches)

• Focal Length: ≈250 mm

• f/#: f/1.67 (extremely fast for its size)

• Center Thickness: 28 mm

• Edge Thickness: 4 mm

• Material: BK7 Optical Glass (high clarity, >90% visible transmission)

• Coating: Uncoated

• Figure: Plano-Convex – curved surface on one side, flat on the other

Condition:

✅ PRISTINE – FLAWLESS
✅ NO SCRATCHES, CHIPS, OR CLEANING MARKS
✅ APPEARS UNUSED – OPTICALLY PERFECT

Recommended Applications:

• DIY Astronomy: Ideal as the objective lens for a 6-inch refractor telescope. Expect bright, detailed views of the Moon, planets, and star clusters (note: classic chromatic aberration present in single-element designs).

• High-Power Solar Concentration: For scientific demonstrations or small-scale energy projects (Use extreme caution: proper safety eyewear and setup required).

• Laser & Optical Systems: Focusing element for high-power laser cutting, engraving, or medical laser setups.

• Magnification & Inspection: Large-area magnifier for detailed inspection, reading, or educational displays.

• Beam Shaping & Condensing: Use in projection systems, illuminators, or custom optical benches.