Its other characteristics are quite nice as well. Diffraction limiting sets in somewhere between f/11 and f/16. One stop down to f/4, and its sharpness is very good to excellent across the entire frame at all focal lengths. This was another lens that was a really pleasant surprise when we ran it through its paces in our test lab its performance was really excellent in practically every parameter, and it sells for a very attractive price.Īt its maximum aperture (a very wide and constant f/2.8), it's blur plot is remarkably flat across almost its entire focal length range, softening a bit overall and more in the corners at 50mm. Morio Ono, president and CEO of Tamron Co., Ltd., announced that the company has developed SP AF17-50mm F/2.8 XR Di II (model A16) with a Built-In Motor for Nikon. Note: PMA, January 31, 2008, Las Vegas, NV - Mr. These lenses are not designed for 35mm film cameras and digital cameras with image sensors larger than 24mm x 16mm. The lens boasts one of the best close-up shooting performances in the class of fast standard zoom lenses designed exclusively for digital cameras and featuring an f/2.8 maximum aperture throughout the entire zoom range, to ensure stress-free photographic shots at all focal lengths and distances.ĭi II lenses are designed for exclusive use on digital cameras with smaller-size imagers and inherit all of the benefits of our Di products.
Additionally, a broader photographic expression through the use of faster shutter speeds as a result of the maximum aperture offers enhanced photographic pleasure. In addition, portrait shots are made beautiful with the natural out-of-focus effect characteristic provided by the fast f/2.8 aperture. (From Tamron lens literature) The SP AF 17-50mm f/2.8 is a lightweight, compact, fast standard zoom lens designed exclusively for digital SLR cameras, expanding the product concept of the popular SP AF 28-75mm f/2.8 zoom lens.
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