Nikon WT-4A avenger For lenses with 49mm filter

For lenses with 49mm filter threads

with some paint wear from normal use and handling

So if you're looking for a toy

and a constant f4 maximum aperture

Nikon WT-4A avenger For lenses with 49mm filterThe Nikon WT 4A is a wireless interface for Nikon D3, D4, D300, D700, D800, and, D7000 cameras. With Nikons Camera Control 2 software (not included) you can connect your camera to a PC for remote shooting via either WiFi or Ethernet. As you can see from the image, this is not a tiny device, and its mode of operation is definitely less casual than modern wireless systems, so you may want to look into what it takes to get this thing to do what you want.