18mm Dia x -46 FL MgF 2 Coated, Achromatic Lens

Product Details Correct for Color and On-Axis Aberrations MgF 2 Coated for Low Reflection Ideal for use as Barlow Lenses Consisting of two optical elements cemented together, negative achromats are corrected for color and on-axis aberrations. Used predominantly as Barlow lenses to extend focal lengths, they are often combined with positive achromatic mirror systems and imaging lenses. Specifications General Type: Achromatic Lens Physical & Mechanical Properties Diameter (mm): 18.00 Optical Properties Effective Focal Length EFL (mm): -46.00 f/#: 2.56 Numerical Aperture NA: 0.20 Coating: MgF 2 (400-700nm) Coating Specification: R avg ≤1.75% @ 400 – 700nm Wavelength Range (nm): 400 – 700 Regulatory Compliance Certificate of Conformance: View ×