DESC: The Quantaray by Sunpak XLF-50 flash has a high guide number of 65 (ISO 100/feet) which will offer a much greater flash range over built-in flash units found in entry level digital SLR cameras. Flexibility is what the XLF-50 is all about with a 180 degree swivel control panel and hotshoe assembly for complete self-contained storage. Being so compact in the self-contained mode, it is small enough to fit in a pocket or bag at only 3.5-inches deep and less than 7 ounces.