Canon C1: for all cameras that have a 2.5mm phono port. fits most three digit Canon DSLR's (i.e. 350D), the 60D, 1000D and the G series. Pentax K series, *istD series, GH series, MZ-6, ZX-L, MZ-L. Contax N. Samsung GX.
Canon C3: fits Canon EOS single digit series cameras (1D, 5D, 6D, 7D, etc), 1V, 30/40/50D, D2000, EOS3
Nikon N1: fits Nikon D5, D4 series, D500, D8xx, D700, D3 series, D300 series, D200, D1 series, D2 series, N90, Nikon F
Nikon N2: fits Nikon D80, D70s, D70 w/ battery grip
Nikon N3: fits Nikon D5xxx, D3xxx, D7xxx, D750, D6xx, D90
Olympus L3: fits Olympus E600, EP1/2, E30, E620, E450, E520, E420, E510, E410, EP series
Sony S1: fits Sony A series (*not for cameras using the Multi-Port))
Sony S2: fits Sony A7 series and others with the Multi-Port