This is a Vivitar collection with a very clean 283 flash and a ton of original accessories for the Flagship Vivitar 283 circa 1977. Fitting on the flash head is the FA-1. That stands for Filter Adapter. The flash covered about 35mm lens with nothing on it. The LK-1, Lens Kit contains 24mm, 28mm, Tele which they say is 70-135mm, then the L. Tele is listed as 135mm and longer. The FK-1 is a color kit that has Red, Yellow, Blue, UV, ND and 85B. The SL-2 Remote Flash Trigger if you want to use it as a light trigger. Two cords are also included; the short PC1 and the remote sensor cord the SC1. The unit runs on 4-AA batteries that are held in what Vivitar calls the AP1, you will be getting an extra for a total of two. I also am including my DIYed 1/4 20 stand or tripod adapter.