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Tamron 18-250mm f/3.5-6.3 AF IF Aspherical Macro

Photos - Camera Lens Tamron 18-250mm f/3.5-6.3 AF IF Aspherical Macro
Tamron 18-250mm f/3.5-6.3 AF IF Aspherical Macro
Macro photography
System
Canon
Nikon
Minolta
Pentax
Sony
Mount
Canon EF
Nikon F
Pentax K
Sony A
Focal length
18 - 250 mm / (including crop - 27-375 mm) /
Aperture value
f/3.5 - f/6.3
Viewing angles
75° 33’ / (6° 23' APS-C equivalent) /
Min. diaphragm
22
Minimum focus distance
0.45 m
Maximum zoom
0.28
Sensor size
APS-C
Autofocus drive
is absent
AF drive (screw driven)
Internal focus
Design (elements/groups)
13 elements in 16 groups
Number of diaphragm blades
7
Filter diameter
62 mm
Dimensions (diameter/length)
74.4x62 mm
Weight
430 g
Added to E-Catalog
june 2007
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Information in model description is for reference purposes.
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From the press release:

Japanese independent optics manufacturer Tamron has released the highly anticipated Tamron AF18-250mm F/3.5-6.3 Di-II LD Aspherical (IF) Macro multi-purpose lens for use with Sony Alpha cameras.

The design uses one low dispersion lens and one anomalous dispersion lens in the first group to minimize axial chromatic aberration. The presence of two hybrid aspherical lenses contributes to the compactness of the model, despite the zoom factor of 13.9x - the highest in the Tamron lens lineup. In addition, thanks to the use of multi-coated technology on the contact surfaces of the lenses, spurious images (ghosting) and glare (flare) are minimized.
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