44% off (Sale price $369.00 ) :: Sigma 17-50mm f/2.8 EX DC HSM Zoom Lens for Pentax K DSLR

44% off (Sale price $369.00, Reg. Price $669.00) :: The Sigma 17-50mm F2.8 EX DC HSM is a wide to standard zoom lens designed for Pentax DSLRs. Equipped with a Hyper Sonic Motor (HSM) the 17-50mm boasts a large fixed 2.8 aperture throughout the entire zoom range and ensures quick accurate and consistent autofocusing. FLD glass elements (with performance equal to fluorite) along with two glass mold elements and one hybrid aspherical lens provide excellent correction of aberrations and allow for incredibly sharp images with great contrast. Super Multi-Layer coating reduces flare and ghosting while the lightweight and compact construction make it a necessary addition to any camera bag.DC – DC for DigitalThese are special lenses designed for APS-C size sensors so that the image circle matches the smaller size of the image sensor of most digital SLR cameras. Their specialized design gives these lenses the ideal properties for digital cameras the compact and lightweight construction is an added bonus!ASP – AsphericalThe aspherical lens complex allows freedom of design improved performance a reduced number of component lenses and a compact size.HSM – Quiet and Fast AutofocusingHSM lenses employ a motor powered by ultrasonic waves that produce a quiet yet high-speed AutoFocus. You can enjoy high performance with low noise in a variety of shooting situations.EX – EX Lens The exterior of this lens is EX-finished to denote the superior build and optical quality and to enhance its appearance.IF – Inner FocusTo ensure stability in focusing this lens moves the inner lens group without changing the lens’ physical length.Wide to Standard Zoom LensA standard zoom lens is a lens in which the focal length varies unlike a prime or fixed lens. A zoom lens is one that maintains (or regains) focus even when the focal length of the subject matter changes. Zoom lenses such as this provide the user with a convenient go-to lens of variable focal length. A wide-angle lens is a lens whose focal length is shorter than a normal lens for a given picture plane. A wide-ang

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44% off (Sale price $369.00 ) :: Sigma 17-50mm f/2.8 EX DC HSM Zoom Lens for Pentax K DSLR

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