The Pentax 8x36 DCF HS binocular is an excellent blend of performance and convenience. The 8x36 Pentax DCF HS binocular is made with BaK-4 glass for the best optical performance. The phase-coated prisms of the DCF HS 8x36 binocular have an additional reflective coating to improve light transmission, yielding crisp, high-contrast images. The polycarbonate frames of the Pentax DCF HS 8x42 binocular are covered in black rubber armor to protect the optics, giving durability to their minimal 23.2-oz weight.