At last I found a 55mm diameter plastic tube that makes for a great Telescope lens guard
My back up KOWA TSN 601 has been in need of a snug cover for years- finally made one!
It doesn't smell of Oregano either!
S
For advice about Birding, Identification,field guides, binoculars, scopes, tripods, etc - put 'Birding Tips' into the search box
2013 photos & vids here
eff37 on Flickr