I have just returned to the hobby after some 20 years. Included in my "keepers" were 12.5 mm and a 25 mm Cave Astrola orthos left from my Cave 8" Cass along with a 3" guide scope I kept around for some casual viewing. Question: how do these orthos measure up to the newer generation of, say, Meade 4000 series Possls. Should I find a person who wishes to fill in their vintage Cave collection with some authentic Cave eyepieces, or should I keep them? Thanks to all who wish to respond. Ed 
