Product Description

Lenses are designed for exclusive use on digital cameras with smaller-size imagers and inherit all of the benefits of Di products. The SP AF17-50mm 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 AF28-75mm F/2.8 zoom lens. These lenses are not designed for conventional cameras and digital cameras with image sensors larger than 24x16mm. In addition, portrait shots are made beautiful with the natural out-of-focus effect characteristic provided by the fast F/2.8 aperture. Additionally, a broader photographic expression through the use of faster shutter speeds as a result of the maximum aperture offers enhanced photographic pleasure. 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. Weight - 430 grams (15.2 ounces)

Product Details

• Color: Black
• Brand: Tamron
• Model: AF016NII-700

Features

• Built in motor for use on the new Nikon Cameras
• Zoom lock
• Includes lens hood
• 6 year Tamron Warranty
• 67mm filter size

Amazon.com Product Description
Designed for exclusive use on digital cameras with smaller-size imagers, this Tamron AF 17-50mm f/2.8 Di-II zoom lens is ideal for a host of situations. The fast f/2.8 aperture, for example, provides a natural out-of-focus effect for portrait shots and other intimate moments. The lens's faster shutters speeds--a result of the maximum aperture--also provide a broader photographic expression to enhance your photographic pleasure. As a result, the lens boasts one of the best close-up shooting performances in the class of fast standard zoom lenses, with the f/2.8 maximum aperture extending throughout the entire zoom range to ensure stress-free shots at all focal lengths and distances.

Note: The Tamron AF 17-50mm f/2.8 XR Di-II zoom lens is not designed for conventional cameras or digital cameras with image sensors larger than 24mm x 16mm.

Specifications

• Focal length: 17-50mm
• Maximum aperture: f/2.8
• Lens construction: 16 elements in 13 groups
• Angle of view: 78 degrees @ 45 feet to 31 degrees @ 11 feet
• Type of zooming: Rotation
• Diaphragm blades: 7 (circular)
• Minimum aperture: f/32
• Minimum focusing distance: 10.6 inches
• Macro magnification ratio: 1:4.5
• Filter size: 67mm
• Corresponding mounts: Nikon
• Built-in motor: Yes
• Dimensions: 2.9 inches in diameter and 3.2 inches long
• Weight: 15.2 ounces
• Warranty: 6 years

Customer Reviews

No focus problems here
I was wary of picking this one up, but so far I haven't noticed anything wrong at all with autofocus: very clear, crisp images, and I'm loving the speed compared to my D40's stock lens (18-55mm f/3.5-5.6).

About all I could complain about is the motor, which is noisier and seems slower than the 18-55. It works though which is the main thing! Build quality seems solid.

Mine is Japanese-made according to the label, serial number 29xxx. One would hope that after building nearly 30,000 of the things they would have any quality control problems worked out.

Front focusing
I bought this lens to take pictures of live shows and house indoors.

It took me an hour to notice that AF was front focusing on my Nikon D90.

Manual focus pictures were perfect but with low light AF works much better than my eyes.

I returned the lens immediately and asked for a replacement. Amazon did not have it and item was back-ordered with no estimated available time so I asked for a refund that arrived just in time to get the Tokina 11-16mm f2.8... but this is another review.

Blurry Pictures
I received a bad copy. The guys at Tamron let this one through without quailty assurance. This lens had a hard time focusing. It appeared fine on the preview screen, but upon uploading to my computer, 80% of the pictures were blurry. This occurred on all apertures. Don't think this is user error as I have been taking pictures for a lifetime. The autofocus motor makes a louder than normal wheee-zzz sound when trying to focus. Bad experience over-all.