Hi, Just to share.
If you are thinking of using a step up from 46mm to 52mm and using 52mm filters moving forward on your LZ28, don't do that.
Bought 2 filters and a stepup yesterday and fix on my camera. When the lens auto retract, your zoom will be stuck. (by the way, you cannot overwrite the auto off). Happened to me. I had a hard time removing the step up ring. Initially thought that my FZ is a gone case.
So now I am stuck with 52mm filters (just one day old and never use before). Have to sell away at a loss.
Hope that no one will make the same mistake as me.