The RMC Tokina DOUBLER is a Japanese-made 2x teleconverter for Nikon F mount, and comes with a dedicated pouch. It doubles the magnification of your existing lens. I've used it 4-5 times since purchasing it, and the lens is clean with no mold or dirt. - Brand: Tokina - Model Name: RMC Tokina DOUBLER - Included Accessories: Dedicated pouch - Mount: Nikon mount - Features: 2x teleconverter Thank you for looking.