【Limited Price on 9/8】 I am selling this because I purchased it for photographing wildlife for work, but it didn't suit my shooting environment, and I rarely used it. I've only used it a handful of times. I don't see any fine dust or debris inside. The exterior is also clean. When not in use, it was stored in a dehumidified storage cabinet. The performance itself is excellent. *Please note that this includes only the teleconverter body and front and rear caps. *This is an RF mount. It cannot be used with EF mount lenses. *This is a used item, so I am looking for buyers who understand the common sense regarding used items.