Hoya 77mm Pro1 D UV $45.00 Hoya 72mm Pro1 D CIR-PL $70.00 Hoya 55mm HMC UV(C) $35.00 Hoya 72mm ND8 $60.00 Marumi 77mm CIR-PL $70.00 Marumi 77mm ND8 $55.00 Rodenstock 77mm Digital Pro UV/1x $50.00 Filter cases are also available if you're interested.