Excerpt: This is used on my Nikon SB-28 flash. As with any IR type device this works best inside. It does work in a softbox, behind a product, or behind furniture. I have placed it in a room off a hallway adding light to that area of a home; it did fire the flashThough it is line of sight, however when placed behind furniture in a large well lighted room it may not fire. Make sure the sensor is facing the sending flash or where it can pick up the bounced flash.
Excerpt: After I purchased it, I only tested it and then I put it in my storage. Because I eventually decide to get Pocket Wizard for wireless lighting. This one works great for what it is designed for. I like the way it does not require any battery but i do not line the "must-in-sight" requirement.
Excerpt: Some flash devices do not have a sensor to fire them such as the Nikon SB-28. Putting this on the SB-28 provides the ability to place it within my shooting environment having the flash fire. Some Nikon flash, others as well, do not have a IR widow. When you want to fire the SB-28 using wireless this device is a must.
It is old but does what it has to do, brilliantly!
9 February 2011
Excerpt: I got it for my sb-700 flashlight, and then discovered that it was not necessary as my D7000 has commander flash available. But the SU-4 eliminates the annoying sound of the flash and has perfect timing with my camera, it can also be used with flashes with no wireless features like the SB-400, cool!!