I purchased this item new and unused on Mercari and used it only once. I am selling it because I switched mounts on my DSLR and can no longer use it. No operational issues. No dust or debris visible to the naked eye. Industar 61 55mm F2.8 L39 mount Since there is no L39 option in the size category, I have listed it as F-mount. Included items: Front cap, rear cap Metal hood Protective filter