Reviews and Problems with Tamron SP AF 11-18mm f/4.5-5.6 Di II LD Aspherical
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The Luminous Landscape
11 August 2008
Excerpt: One of the frustrations that owners of so called reduced-frame DSLRs have had for the past five or so years has been the lack of really wide angle lenses, especially zooms. Put a 20mm lens on a DSLR with an APS-C sized sensor and you've got a 30-32mm lens. No longer very wide. Even a 14mm lens, the widest prime available until recently, becomes a 21mm or 22mm lens; wide, but no longer super-wide.
Excerpt: The Tamron SP AF11-18mm F/4.5-5.6 Di-II LD Aspherical (IF) is a wideangle zoom lens designed for APS-C sensor cameras. That means just about everything except the Kodak full frame DSLRS and the Canon EOS 1D series DLSRs. On a typical APS-C digital camera, such as the Canon EOS 20D, it has the same field of view as a 17.6mm to 28.8mm lens would on a full frame 35mm camera. The lens is available in Canon EOS, Nikon AF-D and Konica-Minolta AF-D mounts.
REVIEW: Tamron SP AF 11-18mm f/4.5-5.6 DiII LD Aspherical (IF)
22 May 2008
Conclusion: This lens goes a long way in overcoming the biggest drawback of the cropped digital sensor, that of wide-angle coverage. The light weight, which possibly compromises build quality slightly, reduces the penalty incurred by carrying extra lenses. The only disappointment was the quality drop-off towards the edges of the image, but many compositions can cope with the anomaly.
Pros: Good control of distortions, Good contrast and colour rendition, Lightweight and comfortable in use.
Cons: Sloppy manual focus, Fall-off in quality towards the edges.
Excerpt: This 11-18mm lens from Tamron is pretty lightweight, with a predominantly plastic finish. The design is functional - the zoom ring at the rear has a chunky design, while the manual focus ring at the front is relatively large. Once the lens is placed on the front of a D-SLR with a 1.5x focal length multiplication, you have a lens with a 35mm equivalent of 16.5-27mm (17.6-28.8mm with a Canon D-SLR), so it hasn't got the greatest range here on test, but it's more than wide...
Summary: Tamron's new SP AF11-18mm F/4.5-5.6 Di-II LD Aspherical (IF) lens is the company's first ultra-wide zoom lens designed exclusively for DSLR cameras with 'APS-C size' sensors. Available with Canon, Konica Minolta and Nikon mounts, it is surprisingly compact. This is largely due to a new design that uses a large-aperture glass-moulded aspherical element, hybrid aspherical elements and elements made from high index/high dispersion glass and low dispersion optical glass.