Camera stuff

I've been hanging on to this stuff for ages since my last SLR with a 52mm mount. All the lenses since seem to be enormous, my latest Nikon has a huge 67mm filter size which means you have to take out a mortgage on a skylight filter.
Mrs EG has a new Nikon and surprisingly it has a sensible 52mm size mount - voila - home for these fellas and also a Cokin special filter holder.
No doubt the effects of these will be seen in due course?