Thank you XPL,Richard, Jim and Dagger for looking..
Your comments make spending hours ; finding,sorting,cleaning,scanning and uploading to Photobucket all worthwhile. Especially as
I haven't ever seen these photos other than in a hand-held slide viewer.. I am really at a loss to explain how some are quite clean and bright whilst others - in the same box - are dull, dark and very dirty or grainy.
The best shots are from 91 onwards when I acquired my Canon EOS-600 and 70-300mm sigma 'slide or telescopic action' zoom. This lens died some time ago as the slide action eventually sucked in so much dust and grit that it seized and refused to zoom. That is why I now only use 'twist-grip' zooms.
ibw