Nikon SG-3IR is a replacement panel for built-in flash & can be attached to the hotshoe of a camera when using the built in flash as a remote commander for Nikon flashguns like the R1 close-up flash system, removing any unwanted flash spill from the builtin unit. Cameras like the Nikon D70 series fire a reduced output flash to set off the remote flashgun which can sometimes slightly affect the results especially at close distance. The Nikon SG3IR is included as standard with the R1 series closeup Flash Gun.