Hi, I have a Pentax KX with 2 x lenses
52mm DAL18-55MM f3.5-5.6AL Also a 58mm DAL55-300mm F4-5.8, I'm looking at buying some ND Filters what would you all suggest the screw on circular type or the flat type that go into the holder adapter, and for which lens would you buy them 52mm or 58mm
m...