Beginning as TECHSPEC PCX Lenses, TECHSPEC Best Form Aspheric Lenses are polished into aspheric form using state-of-the-art QED MRF Q22-Y Aspheric Polisher. Units produce diffraction-limited spot sizes at design wavelength — suited for focusing or collimating applications. Available in 12 different 25 mm diameter models, lenses offer focal lengths of 25, 50, 75, and 100 mm with focal length specification wavelengths of 532, 633, and 1,064 nm.