Just getting interested in macro photography, so I read up on lenses I can use with my Nex-5n that can also be found for under $100. Just testing the waters right now so as much as I would love a Tamron 90mm or a Kiron 105mm but I can't justify it. If I find out I really like macro work then I can delve deeper. For now, I've worked my choice down to the two lenses in the title. Both require extension tubes and both seem like solid choices. Am I right? Would you suggest another lens entirely? It would be great to have something that doesn't require an extension tube but I can't find anything within my parameters. Thanks in advance.