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AF18-250mm F/3.5-6.3 Di II LD Aspherical (IF)
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DESCRIPTION

Lens Construction (Groups/Elements) 13/16
Angle of View
(Equivalent to APS-C size)

Diagonal

 75°33'-6°23'
Horizontal 65°36'-5°19'
Vertical 46°21'-3°19'
Diaphragm Blade Number 7
Minimum Aperture F/22
Minimum Focus Distance 17.7in.(0.45m)
Macro Magnification Ratio 1:3.5 (at f=250mm MFD 0.45m)
Filter Diameter ø62
Weight 430g (15.2oz)
Diameter x Length ø2.9 x 3.3in.
(ø74.4 x 84.3mm)
Accessory Flower shaped lens hood
LEGEND
ASLAspherical. The lens employs three aspherical elements to reduce distortion and spherical aberrations at all focal lengths.
Di-IILenses for Digital SLR Cameras Only
IFInternal Focusing
LDLow Dispersion

Reviews
by Julia Silber
http://tamron.com/lenses/prod/assets/pdfs/popphoto_testreport18250.pdf