Dear all, I have a Minolta MD 50mm 1:1.7 (at least this is written over the lens ) I would like to try some teleconverters, preferably the 1.5x or even the 2x for my lens. I guess I have to go for the "official" minolta ones. I had a first look and the ebay market looks to not have one. Instead I find teleconverters from other manufacturers. How do you rate those then? MY apperture ring has the following numbers: 1.7, 2.8, 4, 5.8, 11, 18 , 22 if I am loosing one stop that would mean that my apperture ring would be now 2.8, 4, 5.8, 11, 18 , 22, +(plus one more here I guess). Right? A.