- Model name: Tamron SP 17-50mm f/2.8 XR Di II
- Focus Type: Autofocus / Manual
- Format : APS-C / Crop Sensor
- Purchase options: Amazon | Adorama | B&H
The Tamron SP 17-50mm f/2.8 XR Di II offers slightly wider field of view at 17mm than a standard 18-55mm kit lens that has almost become a standard for most photographers around the world. However on the other end the lens has tag smaller field of view on the tele end at only 50mm. But it more than makes it up with a fast constant aperture of f/2.8 which allows the lens to capture moments in relatively less quantity of light. However there may be slight problems of vignetting when used at f/2.8. Stopping down always helps and in this case increases the sharpness of the images considerably. This lens is perfect as a everyday lens for most shooting needs except for where a tele-lens is a necessity.
Designed for the smaller image circle of an APS-C crop sensor based DSLR, the lens comes in compatible mounts for Nikon, Canon, Sony and Pentax. Mounted on a crop body the lens has the same field of view as that of a 24-75mm lens mounted on a full free DSLR. The lens comes with a manual focusing ring which is mounted in from of the larger zoom ring. The focusing ring rotates during auto focusing and is something that can be bothering for someone who is used to a lens which is non-rotating and with a non-rotating full-time manual feature.
The lens has a total of 16 elements arranged in 13 groups. The diaphragm of the lens consists of 7 rounded blades allowing it to stop down to f/32. The weight of the lens is 440 grams and it takes a filter of size 67mm. Available at Amazon | Adorama | B&H
Sample Images by Tamron SP 17-50mm f/2.8 XR Di II on Flickr
Tamron SP 17-50mm f/2.8 XR Di II Lens Specifications
|Angle of View||78°45′-31°11′ (APS-C size equivalent)|
|Diaphragm Blade No||7|
|Min Focus Distance||10.6in.(0.27m)|
|Magnification Ratio||1:4.5 (at f=50mm MFD 0.27m)|
|Diameter x Length||ø2.9 x 3.2in.
(ø74.0 x 81.7mm)
|Accessories||Flower-shaped Lens hood|
Nikon with Built-In Motor
- More info at Tamron
- Tamron SP 17-50mm f/2.8 XR Di II Lens Catalog
- Full Line Catalog
- Tamron Learning Centre