Lenscoats for these lenses will cost you about:
100-400 - $80
400 f5.6 - $80
400 DO - $100
I made my own from one running foot of 3mm neoprene B foam. Cost of the neoprene $13 and I had a bottle of Pliobond glue, but figure maximum of $8 for the right glue. Total cost of $21 to do the three lenses, compared to $260 if I had bought Lenscoats.
Not as professional-looking, but they do the job for me.
You can order the neoprene and glue from rockywoods.com
