This line of ultra-high-performance lenses is designed and manufactured to the exacting specifications demanded by professionals and others who require the highest possible image quality. The foremost priority is achieving superior performance parameters – high design standards take priority over cost constraints. As a result, Tamron SP lenses feature innovative designs that have established an enviable reputation for excellence amongst demanding photographers.
9 diaphragm blades for superb blur quality
The number of diaphragm blades affects the "shape" of the blur in out-of-focus areas of the image. This is more important in portraiture, where the aperture setting is often wide open, and macro photography, where the high magnification results in blurred background and foreground even at narrow apertures. When backgrounds are soft and blurred, not only is the effect very pleasing and "photographic", but it also serves to isolate the subject from a distracting background, providing a professional-looking image. A high number of blades provides a rounder shape to the aperture, which in turn makes the shape of the blur more circular and much more natural.
Improved lens coatings for digital photography
One major difference between digital and film cameras is how internal reflections may occur and to what extent. These internal reflections can cause unwanted flare or ghosting on the final image. In a film camera, internal reflections can be created inside the mirror box of the camera or from light reflecting off the film surface itself. However in a digital camera, the almost mirror-like surfaces of CCD and CMOS sensors make this much more of a challenge.
Di lenses offer new anti-reflection countermeasures that are essential in lenses designed for use with digital cameras. The SP AF90mm Di features an improved coating technology that reduces the problematic reflections to the absolute minimum.
Super Performance series
Performance takes priority for superb image quality
Ideal focal length for both film and digital
As a medium telephoto focal length, 90mm is particularly useful as a portrait macro lens when used with a film camera. When used on a digital SLR camera with a smaller image sensor, the lens provides a focal length equivalent to that of 140mm, so it can be used conveniently as a telephoto macro lens.
Improved external design for easier handling
As manual focus is a common part of fine macro photography, the rubber pattern on the focus control ring of the lens has been improved to ensure a better grip. In addition, finishing touches like the graphic display and imprinting provide better visibility and loan a highl-quality aesthetic presentation to the lens.
The most lightweight lens in Its class
Design improvements make the SP AF90mm Di the most lightweight* medium telephoto macro lens available.
*The world's most lightweight among AF90mm to 100mm F/2.8 class life-size macro lenses available at present in the market. The weight values used for comparison are of the Nikon mount.
|Lens construction||10 elements in 9 groups|
|Angle of view||27°|
|Number of diaphragm blades||9|
|Minimum focus distance||29cm (11.4 in.)|
|Macro magnification ratio||1:1|
|Front filter thread||55mm|
|Diameter x length*||ø71.5 x 97mm (ø2.8 x 3.8 in.)|
|Supplied accessories||Lens Hood 2C9FH, soft case|
|Mounts available||Canon, Sony (Konica Minolta), Nikon-D**, Pentax|