Used Nikon TC-301 2X Teleconverter

The front and rear caps were included, and the glass looks pristine with no scratches or haze. It pairs perfectly with my 300mm f/4, giving me crisp 600mm reach for bird shots.

The included front and rear caps plus the 100-day warranty gave me peace of mind buying used. I've been using it with my 300mm f/4 and the image quality is sharper than I expected from a 2X converter.

Put this on my D500 and the autofocus is still snappy, plus the included caps and warranty gave me peace of mind for a used lens. Image quality is sharp enough that I can’t tell the difference from my prime.