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OPTIMAL PRICES
Adorama: $359.00
for Nikon
Adorama: $369.95
for Canon
Adorama: $359.00
for Minolta
Adorama: $379.00
for Pentax

*Price is a changeable thing. Click the link to see the price for today.
     

Tamron 28-75mm f/2.8 AF SP XR Di LD Aspherical (IF)
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DESCRIPTION

16 elements in 14 groups
Angle of View: 75°-32°
Diaphragm Blade Number: 7
Minimum Aperture: F/32
Minimum Focus: 0.33m (13") (entire zoom range)
Macro Mag. Ratio 1:3.9 (at 75mm)
Filter Diameter: ø67
Weight: 510g (18.0oz.)
Diameter x Length: ø73mm x 92mm (2.9in x 3.6in)
Mount Canon, Minolta, Nikon-D, Pentax
LEGEND
AFAuto Focus
ASLAspherical. The lens employs three aspherical elements to reduce distortion and spherical aberrations at all focal lengths.
DIDigitally Integrated Design
IFInternal Focusing
LDLow Dispersion
SPSuper Performance Series Lens
XRExtra Refractive Index Glass

Comparison
by 16:9 (with Sigma 24-70 f/2.8 and Contax Zeiss 35mm f/2.8)
http://16-9.net/lens_tests/35mm_e.html
by Whichlens.COM
http://www.whichlens.com/index.php?blog=5&title=tamron_28_75mm_f_2_8_xr_di_vs_sigma_28_7&more=1&c=1&tb=1&pb=1
Reviews
Popular Photography & Design
http://www.popphoto.com/article.asp?section_id=2&article_id=711
Shutterbug
http://www.shutterbug.net/test_reports/1103sb_tamron/index.html
Detailed review by Photo.NET
http://www.photo.net/equipment/tamron/28_75_Di/
Nikonians
http://www.nikonians.org/html/resources/non-nikon_articles/tamron
/2875-f28/2875-1.html
by PhotoZone (tested on Canon EOS 350D)
http://photozone.de/8Reviews/lenses/tamron_2875_28/index.htm
by Bob Atkins
http://www.bobatkins.com/photography/reviews/tamron_28_75.html
by The Digital Picture
http://www.the-digital-picture.com/Reviews/Tamron-28-75mm-F-2.8-XR-Di-Lens-Review.aspx
Samples
by Eric Tiscer
http://etischer.com/300d/Tamron28-75.html