<Does anyone know what was changed about the SB-22 to make it the SB-22s?> >From Nikon USA: New Speedlight from Nikon Nikon have announced a replacement for the SB22 speedlight . Although more compact and lightweight than its predecessor, the SB22s has more powerful guide number of 28 and a wide-angle coverage of 28mm. Multi-Sensor Balanced Fill-Flash is available with the F5, F90X and F70 when used with AF Nikkor lenses. The new speedlight has a choice of four aperture settings in non-TTL automatic control mode as opposed to two in the SB22 - a real bonus for users of Nikon manual cameras such as the FM2. Other major features include: Three flash modes - TTL automatic control, non-TTL automatic control and manual control AF-Assist illuminator Tilting flash head from -7 to 90 degrees 5 second re-cycling time Dimensions: 68mm x 105mm x 80mm Weight: 210g regards, Henry Posner/B&H Photo-Video http://www.bhphotovideo.com