Tamron 90mm f/2.8 SP AF Di Macro
Optically, this lens is excellent. It is very sharp, with good contrast and a beautiful bokeh.
It has a “classic design” where it extends significantly during focusing. Unlike internal focus designs, the focal length of the Tamron 90 mm will not change during focusing, so framing will remain constant.
AF is precise and locks well. It is, however, quite noisy. Like most macro lenses, the auto-focus speed is not very fast. It is, however, helped by a dial that may be used to limit the AF-travel. In the “limit” position, the lens will auto-focus between 29 cm and 40 cm, or between 45 cm and infinity. In the “full” position, the lens will auto-focus from the CFD (29 cm) to infinity.
The build quality is consumer grade, but the deeply recessed front element is well protected from scratches.
The original version of this lens for Nikon did not have a built-in focus motor. In 2010, the Nikon F-mount version was re-designed to include a gear-type built-in motor to operate the auto-focus system. This new version (image below) is also without a mechanical aperture ring.
Rating: Ed: -, User: - (normalized, 0=useless, 50=average, 100=excellent).
Mounts: Canon EF, Nikon F, Pentax K, Sony A.
Aperture range: f/2.8 to f/32.
Close focus distance (CFD): 29 cm / 0.95 ft (from sensor plane).
CFD magnification: 1:1 / 1X.
Focus: AF (type depends on version).
Filter diameter: 55 mm.
L x D, W: 97 x 71 mm, 405 g.
Approximate street price: USD 460 (new, w/o tax).
Tamron is a Japanese corporation specializing in the manufacture of photographic and industrial optics. The company was founded in 1950 as Taisei Kōgaku Kiki Seisakush. It was renamed Tamron in 1970.
As well as its own-branded designs, it makes many optical units for other companies compact digital cameras, and produces consumer grade lenses for several of the major DSLR manufacturers.