It can be (at least with my Pentax K100D) not focused with the Raynox 5000 Wide Converter by AF. To the extent that is also on the packaging. Unfortunately, I could not even focus manually. Thus, this lens is completely unusable for me.
The Raynox 6600 Wide Converter is as head and shoulders (rather spend a few extra EUR) - although he has me still very disappointed. The focus by AF and MF works. The flash should not use (if wide-angle ancillary to it) - as far as the reference to the packaging. And just so you can see that too very quickly if you have done a few times with the flash - very poor results.
Without flash - the focus will very much on when it goes out of the center of the image ... you can make a real sharpness zone - which is very small in my opinion. Vignetting (black shadows in the corners) can be observed only when really the smallest focal length.
Thus it will be in wide-angle ancillary 2 stars, because you have credit, that you can ever make WW Images - for relatively little money. Nevertheless, only 2 stars, because in turn nearly 100 EUR mean too much money for me for a little WW-gimmick with questionable results.
