Using ext.tubes on macro lens is tricky - you get higher magnification, but you also lose light (several aperture) and DOF is shallower. Eventually you get used and then the fun begins
thanks so much for taking the time to answer my question, I really appreciate it. For me, it's nice to be able to ask someone who has knowledge & experience w/an item for a opinion, & your results are wonderful. thank you
Eventually you get used and then the fun begins