Does anybody know where I can find some good macro lenses for a manual focus minolta?? Ive been searching and all I can find is autofocus. I did come across two though. Are they any good? Sigma 28-300mm f/3.5-6.3 Macro Lens and Sigma 28-135mm f/3.8-5.6 Aspherical IF Macro Lens Replies would be highly appreciated, thanks.