28/2.8 vers. IV, 28/2-ASPH, 35/1.4-ASPHERICAL, 35/1.4-ASPH, 50/1.4 1994-2005, 50/1.4-ASPH, 90/2.8 (current). All 39mm Leica lenses can use 46mm filters with a step-up ring but the correct lens hoods will no longer fit. It might be possible to use a 49-46 step-down on the 135/3.4 APO without vignetting, maybe even the 75/2 but this is pure speculation as I've never tried it. The Konica Hexanon-M (RF) 28/2.8, 35/2 and 90/2.8 also take 46mm filters, as does the Voitlander 28/1.9.