On camera bounce flash 2.7 stops underexposed with TTL firmware
Like the title says. Similarly the off camera ttl exposures aren't correct either. But on camera bounce flash underexposes when using the same brand flash as the camera model (like a nikon camera and nikon flash). Strangely the exposure seems ok when mounting a flash different to the brand of the camera. Makes no sense to me. Please look into this. TTL on camera is correct when using the HSS only firmware.