I've changed camera bodies and I've changed formats, but one thing that has changed more than anything else in my gear line up is macro lenses. My first macro lens was actually a sigma kit lens that happened to have a close-up option. The optics were absolutely horrid and I never took a photo that I didn't delete with this lens. Moving forward a few months I don't kick with vintage lenses that I found worked with my new DSLR. One of the lenses I ended up buying was a completely battered and broken Vivitar manual focus telephoto lens that also had a close-up feature. Yet again probably not worth it's weight in...well anything.
Eventually I worked my way up to the biggest baddest micro lens that Nikon has to offer, The 105 mm 2.8. Now I bought this lens used for well under half of what it's worth which was an awesome deal but when I better deal came along I had to get rid of whatever I wasn't using so I shipped this lens off to its new owner. I still kick myself in the butt for that. Fast forward a bit and I've been using the 85 mm micro DX excellence from Nikon and been pretty happy with it. The image quality is solid and with the vibration reduction this lens became very useful.
Sorry for such A long introduction but all of that brings me to here: I have a new macro lens. When I switched to Fuji, I was looking for his many ways to save money as possible by not overspending on things I didn't need. One of those things is a completely dedicated macro lens that has autofocus. From using the 105 and the 85 I realized that most everything I would do would come from manually focusing so I set out to find a good macro lens that I could use with my Fuji camera. My requirements were the optics need to be sharp, and it also needed to work with my Nikon camera because I no longer have the 85. Everything else was pure speculation. What I finally landed on was the Nikon 55 mm 3.5 micro with a Fuji X mount adapter. Because of the Fuji's focus peaking and split focus mode, getting small details into sharp focus is easy so I can now focus more on lighting and composition instead of constantly losing focus because of the fickle VR modes or difficult focal length. Another thing I love about this lens is the fact that the optics are buried within the body therefore negating the need for lens hood and also protecting the glass from being scratched.
Great examples of this lens can be found on eBay for around 50 if you know how to work the auctions. This very well could be the best value in a macro lens I have ever found including my monster deal on the 105mm. I'm glad I don't have any macro lenses to compete with this beauty and I don't see myself replacing it anytime soon.