![]() ![]() While other features, like internal focusing and image stabilization, help with the process of taking images, Tamron’s claim of a rounded diaphragm intrigued me. Not having to reach for a Manual/Auto switch on the side of the barrel makes precise focus in macro situations a lot easier. Two features I enjoyed were the extra large focus ring (it takes up half the lens barrel, making it easy to use even with gloves on) and full-time manual focus. This brings the price up a little, but I believe Tamron has done a good job of balancing the two. The effect is sharper images as compared to lenses made with a lot of acrylic elements. The heavier a lens is, the more glass has been used, and in this case, it is Tamron’s Extra Low Dispersion Glass. In the case of the Tamron 90mm, it feels solid, and that’s hard to fake in the world of optics. While not always 100% true, you can tell a lot about DSLR equipment by handling it and lenses fit the bill as well. ![]() When I am asked by students about buying new lenses, I tell them to go to a brick-and-mortar store and lay their hands on the new equipment. NOTE: All sample images in this article are presented with a minimal amount of correction to show nearly out-of-camera examples. The lens comes in mounts for Canon, Nikon, and Sony, although the Sony mount does not include the VC feature as the Sony cameras that would fit this lens have their own VC built into the bodies. VC stands for Vibration Compensation and USD is for Ultra Silent Drive, which is a quieter form of automatic focusing. Macro 1:1 means you can achieve a life-size capture of your subject on your camera’s sensor. With an aperture of f/2.8, the lens has solid speed in low light and great separation between subjects. SP is Tamron’s line of high-end lenses and it carries a price tag of $650 currently on Amazon. Let’s break down that name a little to see the goodies this lens encompasses. ![]() The official title of this lens is the Tamron SP 90mm f/2.8 Di Macro 1:1 VC USD. ![]()
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