Vidrio de brillo Tiffen 77 mm serie FusionVND 2 + filtro ND variable MFR: 77GG2VND
MFG# 77GG2VND. Hand blower first, if it's just light dust, that usually handles it. If you need to clean further, a Kim Wipe sprayed with Tiffen/Pancro Lens Cleaner, work in a circular motion from the middle out.