Nikon TC-300 lens mount_Retina Worth noting that this is

Worth noting that this is a fisheye lens- so the image it produces is uncorrected for distortion- and that

A classic fast standard lens with clean glass and a good aperture

so you set the aperture and the camera sets the shutter speed

Includes Nikon soft shutter release

and supports external 12-bit CinemaDNG recording- and there's a ton more video-specific function that makes this a really great unit for video production

Nikon TC-300 lens mount_Retina Worth noting that this isThe Nikon TC 300 is a manual focus 2x teleconverter designed for select Nikkor lenses with focal lengths longer than 300mm. In excellent condition, with light cosmetic wear, clean glass. Includes front and rear caps.