Review on Tamron 180mm f/3.5 Di SP A/M FEC LD (IF) 1:1 Macro Lens for Nikon DSLR Cameras (B01N Model) by Darnell Nahabet

I've had this lens for almost three years and I find it perfect for the task at hand: portraits of bugs and flies. You can use it for human portraits, but don't even think of this lens as a replacement for the 200mm f/2.8. Autofocus is terribly slow and noisy. The A850 2.0 firmware has somewhat improved this situation. When shooting macro, I usually use the lens in manual focus mode, so focus speed and noise aren't a factor. Thanks to the long focal length, I have a long working distance and can shoot without scaring the insect and letting it fly away. Despite the fact that the lens only has 7 petals, I have no complaints about bokeh. It's sharp, easy to manually focus (especially with an M-type focusing screen) thanks to the large focusing ring, and the internal focusing design maintains a constant size (and minimizes the risk of dust being sucked in).