Tamron Auto Focus 70-300mm f/4.0-5.6 Di LD Macro Zoom Lens for Canon Digital SLR Cameras (Model A17E)

Description

Tamron Auto Focus 70-300mm f/4.0-5.6 Di LD Macro Zoom Lens
for Canon Digital SLR Cameras (Model A17E) From the Manufacturer Designed for
optimum handling ease and portability (it weighs only 458g ), it’s
ideal for handheld shooting with full-frame and APS-C format SLRs. Its
unsurpassed close-focusing ability (down to 0.95m (3.1 feet ) or 1:2 in macro
mode) makes it perfect for nature and portrait photography. Zoom in to 300mm
from a distance AF 70-300mm f/4.0-5.6 Di LD Macro Zoom Lens Features Low
Dispersion (LD) Glass for Greater Lens Sharpness Low dispersion (LD) glass
elements in a lens help reduce chromatic aberration; the tendency of light of
different colors to come to different points of focus at the image plane.
Chromatic aberration reduces the sharpness of an image, but glass with an
extremely low dispersion index, has less of a tendency to separate (defract) a
ray of light into a rainbow of colors. This characteristic allows the lens
designer to effectively compensate for chromatic aberration at the center of
the field (on axis), a particular problem at long focal lengths (the telephoto
end of the zoom range), and for lateral chromatic aberration (towards the
edges of the field) that often occurs at short focal lengths (the wide-angle
end of the zoom range.)”

Features:

• 9 Groups, 13 Elements Lens Construction
• Rotation Type of Zooming
• 9 Diaphragm Blade Number
• F/32 Minimum Aperture
• 59 inch Minimum Focus Distance (1.5m) in normal setting, 37.4 inch (0.95m) in macro mode f=180mm-300mm range

Product Details:

• Brand: Tamron
• Focal Length Description: 70-300 millimeters
• Lens Type: Macro
• Compatible Mountings: Canon EF
• Camera Lens Description: 300 month
• Product Dimensions: 4.57 x 3.03 x 3.03 inches
• Item Weight: 1.01 pounds
• Item model number: A17E
• Batteries: 1 Lithium Ion batteries required.
• Is Discontinued By Manufacturer: No
• Date First Available: March 8, 2006
• Manufacturer: Tamron