A powerful Nikon Flash from the era of film cameras, bought in Japan. See the compatibility chart from Nikon. http://www.nikon-asia.com/kdb/EN/2005/1026/SB16.htm I used it with D200 in a manual mode. Can be used on just about any camera that has a hot shoe or PC socket in manual or A1 or A2 modes Manual-full power manual. TTL-TTL with Nikon film cameras. It does NOT do TTL with digital SLRs. MD-"motor drive" mode. It fires at approx. 1/16 power(manual)to keep up with a motor drive. The AA modes do work, and work rather well. But if you attach a slave to the SB-16, you can use the built-in flash to trigger the SB-16 off-camera. A1 and A2 modes-non TTL auto. This mode is where you set the flash and camera to the same ISO and f stop. And the sensor on the front of the flash determines correct exposure. The flash tilts up 90 degrees. It rotates 90 degrees to the right and 180 to the left. That's great for bouncing light off of white walls and ceilings. There's a secondary flash that always shoots forward, regardless of main flash head position. It's good to provide some fill light.