Hello. I'm planning to purchase a lens (210mm or 180mm) to photograph still objects. So far, I've used Schneider lenses (Super Angulon 65mm/f5.6, Super Angulon 90mm/f8, APO Symmar 150mm/f5.6, and APO Symmar 210mm/f5.6) and had very good results. Especially, the 150mm and 210mm lenses were excellent for landscape and still objects. However, I wonder if I could get even better results with macro lenses.

Basically, most large format lenses can be used as macro lenses if you extend the bellows of a camera. Therefore, I wonder if it's really necessary to get macro lenses. However, if I could get better images with Nikkor 210mm AM ED or Schneider 180mm Makro Symmar, I might purchase one of them. Does anyone have experiences with these lenses? What are the drawbacks to them?

I appreciate all inputs from you.