FWIW, for the C lenses, the 60 doesn't use bayonet filters, so filter compatibility isn't an issue, I think this is true for the 50 C as well. There are series to bayonet adaptors that let you use the series filters for the wides on the bayonet lenses though.

Hasselblad Historical has a nice chart for comparing focal lengths between formats;
http://www.hasselbladhistorical.eu/HW/HWequifoc.aspx