This telephoto zoom lens provides a large F4 aperture at all focal lengths. The new multi layer lens coating and lens design reduce flare and ghosting, a common problem with digital cameras, and also creates an optimum color balance through the entire zoom range. Two Special Low Dispersion (SLD) glass elements in the front lens group and another two in the rear group offer excellent correction of chromatic aberration. High optical performance is demonstrated throughout the entire zoom range. The internal focusing and zooming mechanism do not change the lens' overall length, assuring ease of handling and operation. A rotating tripod mount can be conveniently detached if required. Since the front of the lens does not rotate, a circular polarizing filter and Petal-type hood can be easily... Less

The Sigma APO 50-500mm F4.5-6.3 DG OS HSM is a 10x high zoom ratio ultra telephoto zoom lens incorporating Sigma's original Optical Stabilizer function. This lens covers a wide range of focal lengths from 50mm to 500mm ultra telephoto. The OS (Optical Stabilizer) function offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible. For Sony and Pentax mount, the built-in OS function of this lens can be used even if the camera body is equipped with an image sensor shift anti-shake system.As compensation for camera shake is visible in the view finder, the photographer can easily check for accurate focus and ensure there is no subject movement. Four SLD (Special Low Dispersion) glass elements provide excellent correction of color aberration. The Super... Less

This bundles includes the following: Sigma 24-70mm f/2.8 EX DG IF HSM Lens for Nikon D40, D40X, D50, D60, D70, D80, D90, D100, D200, D300, D300s, D700, D3000, D3100, D5000, D7000, D1, D2, D2H, D2Hs, D2X, D2Xs, D3, D3X. Digital SLR Cameras. 11pc Bundle Includes: 7 Year Warranty + 4pc Filter Set (UV, Polarizer, Fluorescent + Case) + Lens Hood + Lens Pouch + Lens Cap Keeper + 2pc Advanced Microfiber Cleaning Kit. - MUST SEE!!! The Sigma 24-70mm f/2.8 IF EX DG HSM Lens is a large aperture standard zoom lens that covers a range from wide angle to short telephoto. It is ideal for general photography such as snapshots, portraiture and landscapes. When used on digital SLR cameras which use the APS-C (Nikon DX) sensor, this lens will provide a focal length equivalent to 36-105mm in 35mm terms. DG... Less

The Sigma APO 50-500mm F4.5-6.3 DG OS HSM is a 10x high zoom ratio ultra telephoto zoom lens incorporating Sigma's original Optical Stabilizer function. This lens covers a wide range of focal lengths from 50mm to 500mm ultra telephoto. The OS (Optical Stabilizer) function offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible. As compensation for camera shake is visible in the view finder, the photographer can easily check for accurate focus and ensure there is no subject movement. Four SLD (Special Low Dispersion) glass elements provide excellent correction of color aberration. The Super Multi-Layer Coating reduces flare and ghost and ensures high image quality throughout the entire zoom range. This lens has a maximum magnification ratio of 1:3.1... Less

The Sigma APO 50-500mm F4.5-6.3 DG OS HSM is a 10x high zoom ratio ultra telephoto zoom lens incorporating Sigma's original Optical Stabilizer function. This lens covers a wide range of focal lengths from 50mm to 500mm ultra telephoto. The OS (Optical Stabilizer) function offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible. As compensation for camera shake is visible in the view finder, the photographer can easily check for accurate focus and ensure there is no subject movement. Four SLD (Special Low Dispersion) glass elements provide excellent correction of color aberration. The Super Multi-Layer Coating reduces flare and ghost and ensures high image quality throughout the entire zoom range. This lens has a maximum magnification ratio of 1:3.1... Less

Interfit Strobies STR100 Portrait Kit with SGM700 Flex Mount for Canon 580EX II & Other Select Flashes All Brand New & Factory Sealed Complete Package with ALL Manufacturer's Supplied Accessories Interfit Strobies STR100 Portrait Kit Interfit Strobies SGM700 Flex Mount With BONUS Extras: Precision Design Deluxe 6 Piece Lens & Digital SLR Cleaning Kit Precision Design Deluxe Camera Tripod with Carrying Case Precision Design Memory Card Storage Wallet LCD Monitor Screen Protection Kit Microfiber Cleaning Cloth 1-Year Subscription to Digital Photo Magazine Free High Quality Prints from Clark Color Labs Latest Model with 1 Year Warranty Canon 580EX II, Bower SFD35, Nissin Di622, Nissin Di866, Sigma EF-430, Sigma EF-500 DG ST, Sunpak 444D Interfit Strobies STR100 Portrait Kit Camera, flash and... Less

The large angle of view of the Sigma 12-24 4.5/5.6 EX DG ASPH Zoom (122 degree super wide angle of view at 12mm along the diagonal axis) is ideal for shooting indoors as well as landscape photography. It has a variable angle of view from 122 degrees to 84.1 degrees. Four Special Low Dispertion (SLD) glass elements are provided for effective compensation of color aberration, which is a common problem with super-wide angle lenses. Two pieces of Glass Mold and one-piece Hybrid aspherical lenses offer excellent correction for distortion as well as all types of aberration. By effective arrangement of lens elements and advanced technology this lens has Super Compact dimensions of 100mm full-length, and 87mm Maximum Diameter. It is equipped with an Inner Focusing System that will keep the length... Less

The Sigma APO 50-500mm F4.5-6.3 DG OS HSM is a 10x high zoom ratio ultra telephoto zoom lens incorporating Sigma's original Optical Stabilizer function. This lens covers a wide range of focal lengths from 50mm to 500mm ultra telephoto. The OS (Optical Stabilizer) function offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible. As compensation for camera shake is visible in the view finder, the photographer can easily check for accurate focus and ensure there is no subject movement. Four SLD (Special Low Dispersion) glass elements provide excellent correction of color aberration. The Super Multi-Layer Coating reduces flare and ghost and ensures high image quality throughout the entire zoom range. This lens has a maximum magnification ratio of 1:3.1... Less

Here is 500 grams of Sephadex G-100 from Pharma Chemicals. The powder is in excellent shape. Current catalog price for this is over $1200!!! Good luck!! Buyer must be 21 years of age. Buyer assumes all liability for the use of this item. Buyer agrees to use this item in accordance with all local, state, and federal laws. This is for laboratory and scientific use only! Shipping will comply with all USPS regulations. Item is NOT regulated by the DOT.

This high-ratio 18-200mm zoom lens incorporates Sigma's original OS (Optical Stabilizer) function and is exclusively designed for digital SLR cameras. Perfectly suitable for low light conditions, indoors, at dusk and at telephoto range. The SLD (Special Low Dispersion) glass and aspherical glass provide excellent correction for all types of aberrations. This lens has a minimum focusing distance of 45cm (17.7") throughout the entire zoom range and has a maximum magnification of 1:3.9. The lens design incorporates an inner focusing system, which prevents the front of the lens from rotating, making it particularly suitable for using circular polarizing filters and petal-shaped lens hoods. The overall length of the lens does not change during focusing, ensuring convenient handling and... Less