The SLB-30-70PM is a Plano-Convex Spherical Lens, sourced from OptoSigma, with a diameter of 30.0 mm and a focal length of 70.0 mm. This lens is made of n-bk7 schott material, a popular choice for its high refractive index and low dispersion. The lens's geometry includes a 2.0 mm thickness at the edge and a 5.2 mm thickness at the center, with an effective focal length (EFL) of 70.0 mm. The front and back surfaces of the lens are coated with an opt m coating, designed to enhance transmission in the 400-700nm wavelength range. The lens's base shape is circular, and it has an inner radius of 0 mm and an outer radius of 0 mm. The lens is currently in stock and available for purchase through the provided weblink.