I recommend placing NOTHING in the light path from the lens. There is a pull out tray for filters on the L1200 - take it out, measure it, cut filters to fit. It is what I did.
I actually preferred the results when I used the Kodak filters. You might look for some of them also.
"Photography was not a bastard left by science on the doorstep of art, but a legitimate child of the Western pictorial tradition." —Robert Galassi