Like aspheric and cylinder lenses, TECHSPEC plastic Hybrid Acylinder Lenses provide diffraction-limited focusing performance in one dimension. Designed at 587.6 nm, the lenses are high performers for visible wavelengths. They reduce spherical aberration along the focusing axis and create thin line profiles with broadband sources. The hybrid lens design offers negative optical dispersion and solid color correction. Additional features include a high numerical aperture, diameter of 25 mm, and five focal lengths: 20 mm, 25 mm, 30 mm, 40 mm, and 50 mm. EDMUND OPTICS INC., Barrington, NJ. (800) 363-1992.