At only one third the price of comparable ring flashes I was a little doubtful , but was pleasantly surprised , it does just what it should, fits straight on to my Canon 450D and of course gives very even illumination . I found it best to use manual msettings , at life size or nearly so with EFS 60 mm Macro lens I used f 11 and 1/200 sec for excellent results at 100 ASA . - jiggle the aperture up or down if the subject is very light or dark . One small note of warning , - the on/off switch is small and if you put the flash away with it switched on (as I did ) you have flattened 4 AA batteries. Ted Foster