The Quantum D22wR QTTL Module provides full TTL communication between Qflash Digital flash models and the following Nikon SLR cameras: D2Xs, D2H, D2X, D200, D70, D70s, D80 and Fuji S2, S5. For the D1X, D100 and Fuji S3, only the D12wR can be used. In addition, when used with the FreeXwire FW9T Transmitter it will allow full wireless operation (i-TTL/3D Matrix) of the Qflash T5d flash model, when combined with a wireless receiver and used with a compatible camera. QTTL adapters can offset Qflash output between -3 to +2 stops (in 1/3 steps) in relation to the f/number setting on the camera. Even if the camera doesn't support fill/flash ratio, the QTTL ratio setting tracks the camera aperture as it changes, providing automatic fill/flash ratio.