I would like to ask, if anyone here has experiences with one/some of next 6 TCs: Converters by Harmonica's pictures, on Flickr From left to right: 1. group Vivitar Automatic tele converter 1.5x-5 Kiron 1.5x Match Mate MC Soligor C/D7 macro tele-converter 2x M/MD Minolta MD 2x tele converter 300-L 2. group Pentax rear converter-A 1.4x-s Pentax rear converter-A A 2x-s Any idea which one/ones will be the best one/ones (optically)? As quite obivious... the first 4 have Minolta MD mount and last two have Pentax KA mount....so I'm not able to test all 6 together with same lens (in the future...as I have gotten suitable M4/3 adapters). I stll know those Pentax TCs quite well, but I do not have any experiences with Minolta stuff before. I just got all those MD TCs (and someting more) together with with one long lens. I thought earlier that there were only 2x TCs (and a few very bad 3x TCs) made for Minolta MC/MD mount...but looks like I was totally wrong.