Nikon SB-22 is an economical compact AF speedlight with AF-assist Illuminator for AF mode for compatible Nikon AF-SLRs. The SB-22 employs Automatic Insulated Gate Bipolar Transistor (IGBT) and series circuitry. It's TTL automatic control is compatible with Nikon's F5, F4 series, F100, F90X, F80, F70, F65, F60, Pronea 600i or FM3a (FA, FE2) and other Nikon SLRs for bare basic MANUAL and AUTO flash control. The AF-assist Illuminator works with any Nikon SLRs, including the early F501 body.