Although among the options that I have, I think that extension tubes are best solution from quality point of view.
Tubes work very well.
For now, I am going to attach my M 50/1.4 to the tubes and make it kinda macro-only lens. I don't have much use for this lens anyway, as I use my FA 50/1.7 on *istD.
Actually, the 50/1.7 makes a better macro lens. It's got better flatness of field at close distances.
Godfrey
