Sorry but why do you carry 2 macro lenses of almost the same focal length NIKON 105mm and Zeiss 100mm? Is there a reason? Another thing, those square black+white flower pictures are amazingly high class. Congratulations. Can you let me know about a few secrets of good macro photography tips because i bought the NIKON 105mm macro lens and done a few pictures myself. I want to improve fast. Thanks, Mofeed Qasem Kuwait