The pentax pf 80 ed straight spotting scope brings you hours of comfortable viewing without distortion or chromatic aberrations and with maximum resolution the pf 80 ed features an extra low dispersion objective lens of 80mm lanthanum glass bak4 prisms and an smc multi layer coating of the lenses to ensure an exceptionally bright and clear image the magnesium alloy construction makes the pentax pf 80 ed spotting scope both rugged and lightweight and provides a comfortable grip in the hands