very good product that windscreen raynox .utilisée with uun bridge, one reaches magnification reports 0.5 to 3 depending on the zoom in macro (I have a Canon PowerShot SX40 with a 24-820 zoom) .the distance shooting is fixed at 11 centimeters from the lens; a little too close for dragonflies but very fast has put on the target single-click Prevent premature to use a too short focal length (vignetting). good macro all