For sale is a modified Nikon SG-3IR IR panel for built-in flash. It has been modified to fit on the hotshoe of cameras like the 7D and 70D that have built-in flash that can wirelessly trigger off-camera lights. The panel is an inexpensive way to effectively block the output of the popup flash so you can use the camera to remotely trigger off-camera lights while significantly reducing/almost eliminating the direct flash.
There is an entire thread devoted to it here: https://photography-on-the.net …showthread.php?p=11317176
I paid a little more that retail when I purchased it as it was already modified for use with Canon. It worked flawlessly on my 70D, but I no longer have a need for it.
Price is $15 shipped OBO anywhere in the U.S. (Paypal accepted).