This zoom lens covers an ultra-wide focal length of 17mm considered ideal for Digital SLR use. Since most Digital SLRs have 'APS-C sized imagers', the angle of view is narrower than that of conventional SLRs making the typical wide end of wideangle zooms insufficient for many applications.
SP*: 'Super Performance' - a line of high performance lenses featuring high design specifications.
Di**: 'Digitally Integrated Design' - the designation Tamron puts on lenses featuring optical systems designed to meet the performance characteristics of digital SLR cameras.
Key Features
Lens Construction (Groups/Elements) 11/14
Angle of View 104°-63°
Type of Zooming Rotation
Diaphragm Blade Number 7
Maximum Aperture F/2.8-4
Minimum Focus 0.3m (11.8" (entire zoom range)
Macro Mag. Ratio 1:5.4 (at 35mm)
Filter Diameter ø77
Weight 440g (14.4oz.)
Diameter x Length ø83.2mm x 86.5mm (3.3in x 3.4in)
Accessory Flower shaped lens hood
(entire zoom range)