New series of SP lens that is optimized to make the most of the superior imaging performance delivered by the latest advancements in digital photography. Sporting a totally revamped external appearance, the Tamron SP 45mm F/1.8 Di VC USD Lens provides the ultimate in functionality and operation. The lens is compatible with full-frame DSLR cameras and offer fast apertures and versatile, fixed focal lengths. and it can be used with APS-C format cameras as well Features of the Tamron SP 45mm F/1.8 Di VC USD Lens 1. F/1.8 fast-aperture, fixed focal lens aimed at ultimate performance Optimal use of the latest glass materials, coupled with Tamron's world renowned optical design technology, thoroughly compensated for aberrations of all types to achieve higher resolving power, while fine textures of materials and details are reproduced with subtle tonal gradations. The F/1.8 aperture delivers more light to the viewfinder making it brighter for easier focusing - and more light to the sensor, allowing use even in very dim lighting conditions. In addition, the bokeh (background blur) effect obtained using the F/1.8 fast aperture delivers impressively smooth and soft transition from the main subject to the background. 2. Dynamic close-focusing capability, unprecedented among standard lenses Tamron SP 45mm F/1.8 Di VC USD Lens delivers astonishingly short MOD (Minimum Object Distance) not available from other 45mm standard lenses. Photographers can get closer to the subject with ease, unleashing new photo opportunities with an expanded scope of freedom. Superb image capture is ensured throughout the entire range from the closest to normal shooting distances, thanks to Tamron's proprietary Floating System built into both lenses. 3. VC (Vibration Compensation) System, a feature crucial for high-pixel-density cameras Beneficial under all lighting conditions and especially useful in low light levels, the VC function provides noticeable advantages for handheld shooting by minimizing the adverse effects of camera shake. Cameras with high pixel densities, in particular, are sensitive to minute vibrations which cause unsharpness and degradation of image quality. VC works to ensure the maximum imaging performance even in dim lighting to allow photographers to enjoy the fast F/1.8 maximum aperture to the fullest extent.4. User-friendly product design with close attention to all details Opening a new chapter in the SP legend, product design, opto-mechanical construction and engineering processes are totally integrated. Every single detail and operating function has been thoroughly reexamined, explored and matured to a form that has a friendly, human touch. Product design with maximum emphasis on the human interface in order to achieve the ultimate in