Tamron SP 45mm f/1.8 Di VC USD lens for Canon

First High-Speed 45mm Fixed Focal Standard Lens in Full-Frame Format with VC, Offers Unique Perspective with Significantly Shorter Minimum Focusing Distance

• A New Standard among all standard lenses.
• Slight wide-angle delivers a new photographic perspective.
• Responsive to your intuitive and inspirational motives.
• Provides an equivalent focal length of 70mm on APS-C cameras.
• Fluorine coating on the front element repels water and fingerprints
• Moisture-resistant construction for shooting outdoors under adverse weather conditions
• Circular aperture for enhanced bokeh

Even when used wide open at F/1.8 aperture, provides outstanding image quality with maximum aberration compensation, thanks to optimal use of sophisticated glass materials and highly advanced optical design. SP 45mm F/1.8 Di VC USD is a 10-element, 8-group construction, utilizing two molded glass aspherical elements and one LD (Low Dispersion) element.

Two of the aspherical elements effectively correct the field curvature to ensure planarity of the image plane, while efficiently compensating for spherical and comatic aberrations to achieve superb uniformity across the field with high-fidelity point spread reproducibility. Outstanding resolution is rendered from corner to corner and the sagittal comatic flare (a type of aberration that a point image at corners induces a comet tail-like blur), which tends to become prominently noticeable in night scenes, is thoroughly corrected.

The LD glass element optimally compensates for chromatic aberrations, which tend to become particularly prominent in fast-aperture lenses in general, and delivers crystal clear images without any residual color fringe.

World’s first full-frame 45mm focal length with fast F/1.8 maximum aperture and integral VC (Vibration Compensation)
The aperture is optimized to F/1.8 to create the most practical lens offering superior imaging performance, a shorter minimum focus distance and image stabilization mechanism. Countless simulations during the design phase ensured the high resolution expected of a full-frame, high-speed lens coupled with spectacular background blur.
It is also the world's first* full-frame, fixed focal length standard lens to be equipped with VC. Freedom in handheld shooting has been dramatically improved by reducing camera shake that tends to occur when using shooting in low light such as at dusk and in dark rooms. Also, the full potential of the high performance of the lens is realized by reducing minute vibrations that lower image quality conspicuous in high resolution cameras.

Optimal relative illumination means no dark corners
Some fast-aperture lenses “vignette” or have darkened corners due to uneven light distribution. However, even at the full open aperture, the overall illumination level across the entire field is well balanced and optimized. Because there is a sufficient amount of corner illumination, photographers can enjoy making full use of the wide open aperture.

Specifications

* The Sony mount model does not include VC, since the bodies of Sony DSLR cameras include built-in image stabilization functionality.