Sigma's new 17-50mm F2.8 EX DC OS HSM large-aperture standard zoom lens covers a focal length from 17mm wide angle and offers a large aperture of F2.8 throughout the entire zoom range, making it ideal for many types of photography especially portraiture and landscapes. The OS, Sigma's anti shake feature offers the use of shutter speeds approximately 4 stops slower than would otherwise bepossible. The OS feature allows Sony and Pentax users the option of viewing a stabilized image in the viewfinder, a feature offered only by Sigma. HSM provides fast and quiet AF. Sigma's own FLD glass elements, which have performance equal to fluorite along with two glass mold and one hybrid aspherical lens, provide excellent correction for all types of aberrations. The Super Multi-Layer coating reduces flare and ghosting. This lens boasts superior peripheral brightness and provides sharp, high contrast images even atthe maximum apertures. With a minimum focusing distance of 11 inches throughout the entire zoom range and a magnification ratio of 1:5. When you need to stand ready for any photo opportunity you need a fast aperture so you can shoot in low existing light or at maximum range with a flash. This Sigma lens is perfect. With its compact size and light weight, it's a necessary addition to your camera bag Please Note Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras.

These filters, made from the finest solid optical glass, are ground and polished to the most practical thinness. In addition, they are heat-treated to avoid any distortion or focal shift, and each filter is subject to strict tests in order to ensure a flawless, even surface, which is essential to a quality filter and exceptional photographs.

Key Features:

• Fits 77mm lenses
• Ideal for protecting your valuable lens from scratches and dust
• UV filter absorbs ultraviolet rays to produce crisp, clear photographs
• Polarizing filter eliminates reflections from non-metallic surfaces, and increases contrast and color saturation
• FLD filter helps balance light in outdoor situations or where fluorescent lights are used

Lens filters are translucent glass placed in front of a camera lens to alter or adjust the light entering the camera and to protect the camera lens. Lens filters improve photographs by giving photographers control over light and allowing them to emphasize the features of a scene that they consider most important. This particular filter kit is a combination of the three essential filters no photographer should be without.

Filters are one of the least expensive accessories you can use to make big changes in the way your pictures look.

• UV Filters
  A UV filter is used to reduce UV rays from entering the lens and striking the film. Modern lenses often have UV protection built into them as well as digital sensors, however, UV filters are commonly used to help protect the surface of the lens from scratches, smudges, dirt and other hazards. 
  
  
• Circular Polarizing Filters 
  No camera bag should be without a polarizing filter, whether you shoot digital, color film, color slide, or black and white. A polarizer is different than most filters in that it is composed of two pieces of glass, mounted independently inside a round frame so that one can be rotated relative to the other. As it is rotated, it increasingly cuts out glare and haze. With an SLR, you can actually observe this change through the viewfinder. Polarizers reduce glare from water, glass, or any non-metallic surface. You can also use a polarizer filter to darken blue skies.
  
  
• FLD Filters
  A FLD filter (fluorescent light correction) provides the perfect solution for obtaining pleasing skin tones and correct color while shooting without a flash under fluorescent lighting. This filter gives true-to-life color rendition by removing the harsh yellow-green cast ordinarily resulting from fluorescent bulbs. When shooting under natural light, a fluorescent filter dramatically increases color saturation of subjects such as sunrises and sunsets.

If there is only one accessory you will purchase for the lens of your camera or camcorder, this should be the one. A UV filter serves to protect your lens from all dust, dirt, scratches and fingerprints. It also absorbs the Ultraviolet rays of the sun thereby reducing or eliminating distortion. These filters are manufactured from the finest solid optical glass, and are heat treated and multi-coated to ensure optimum picture quality.

This Dust Blower is Perfect for keeping your camera clean. Excellent way to remove dust off sensitive camera parts without physical contact. Safe for lenses, including multi-Coated Surfaces. Non-toxic.

High Quality 2-in1 Lens Cleaning Pen. Works with all types of cameras, (digital and film), as well as binoculars, telescopes, SLR lenses and other optical products. Environmentally friendly and non-toxic. The small pen style design easily fits in your pocket or camera bag. It features a retractable brush on one end and a spray cleaner on the other end. It also has a convenient clip to keep it in your pocket.

Most efficient way to clean all optical surfaces such as your camera’s lens, LCD viewfinder, filters and auxiliary lenses. Works with all types of cameras, as well as binoculars, telescopes, SLR lenses, eyeglasses & sunglasses.

The perfect way to keep track of your lens caps. A small button tapes onto the front of your lens cap and the elastic loop goes around the barrell of your lens so that your lens cap always remains attached, hanging from the lens. Never lose a lens cap again!

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