The Sigma 18-200mm f/3.5-6.3 DC OS (Optical Stabilizer) Lens offers an “all-in-one” super-zoom lens solution, from wide-angle to long telephoto. It provides the equivalent focal range of approx. 29-320mm when used with a Canon digital SLR camera(*). This lens has now been updated with the OS (Optical Stabilizer) system, which minimizes image blur caused by camera shake, and offers the equivalent of shooting at a shutter speed 2-3 stops faster. This allows handheld telephoto zoom shooting even in poorly lit conditions.

The 18-200mm’s optical design incorporates aspherical lenses and SLD (Special Low Dispersion) glass, which provides the utmost correction for all types of aberrations. It also enables this extended super-zoom lens to be housed in a compact and lightweight construction.

DC lenses are exclusively designed for digital SLR cameras. The image circle (rear of lens) is sized to match the smaller dimensions used for the image sensor on digital cameras. As a result these lenses are also more compact and lightweight, and are better matched to digital SLR cameras.

The OS system uses two sensors inside the lens to detect vertical and horizontal movement of the camera. It works by moving an optical image stabilizing lens group, to effectively compensate for camera shake. It automatically detects movement of the camera and compensates for camera shake when shooting moving subject such as motor sports.

• Two Special Low Dispersion (SLD) elements and three hybrid aspherical lenses provide high quality images throughout the entire zoom range.
• Super Multi Layer (SML) coating reduces ghost and flare.
• The lens design incorporates an inner focusing system, which prevents the front of the lens from rotating, thereby making it particularly suitable for use with circular polarizing filters and petal shaped lens hoods.
• A magnification scale is displayed on the lens barrel for each focal length, ensuring ease of use.

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The Nikon 70-300mm f/4.5-5.6G IF-ED AF-S VR is a high-performance super telephoto zoom lens that has been designed to meet the demands of both digital and 35mm format SLR users. It offers a 4.3x zoom with a range of 70-300mm (equivalent 105-450mm on a DX Nikon D-SLR) and features ED (Extra-low Dispersion) glass elements that ensure superior optical performance.

This lens incorporates Nikon’s second-generation vibration reduction system (VR II) that allows flexible hand-held shooting by stabilizing the image to the equivalent extent of using a shutter speed that is four stops faster when compared with a conventional lens. The SWM (Silent Wave Motor) and IF (Internal Focusing) ensure fast and quiet focusing action, and the nine-blade rounded diaphragm makes out-of-focus elements blend smoothly to produce natural-looking, harmonious backgrounds.
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A superior performance, ultra-compact telephoto zoom lens with Canon’s Image Stabilization. These Diffractive Optics elements are combined to reduce size and boost image quality. AF is super-fast and silent with a ring-type USM, and it focuses down to 4.6 feet – without rotating the front element. A new zoom lock button keeps the lens safe and secure when not in use or used at the wide angle.

• Professional Quality Zoom Telephoto
• Built-In Image Stabilizer
• For Digital or Film SLR Cameras
• Fast Ring-Type USM Autofocus
• Full-Time Manual Focus Override
• Water and Dust Resistant
• Uses Diffractive Optics
• 1 Aspherical Lens Element
• Circular Aperture Diaphragm
• Accepts 58mm Filters

Read more at Canon USA
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This exciting zoom lens provides ultra wide-angle coverage to the EOS 20D, 30D, 40D, 50D and Digital Rebel SLRs. Equivalent to a 16-35mm zoom, it offers excellent performance and optics designed from the ground-up for digital SLR use. Three Aspherical lens elements, plus a Super-UD element, assure image quality. Its ring-type USM means fast and silent AF along with full-time manual focus. It focuses as close as 9.5 inches.

Read more at Canon USA

Reviews

Canon EF-S 10-22mm f/3.5-4.5 USM Lens Review by the-digital-picture.com

To cut the chase, I must say that I am very impressed by the lack of strong barrel and pincushion distortion in the Canon EF-S 10-22mm f/3.5-4.5 USM Lens. It is not perfect, but very good for this extreme wide angle focal length range. There is some barrel distortion at 10mm moving gradually to a slight pincushion at 22m. Slight enough distortion for me to be happy with the results.

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The popular Sigma 18-50mm f/2.8 EX DC Macro Lens has now been improved with closer focusing capabilities – as close as 7.9″ (20 cm) – and has a maximum magnification rating of 1:3, ideal for close-up photography. This lens is exclusively designed to suit the characteristics of digital SLR cameras. The characteristics of digital SLR cameras were taken into consideration when designing the lens power layout. The advanced lens design corrects various aberrations. This lens provides the utmost correction against lateral chromatic aberration which is a serious problem for digital SLR cameras.

This lens is also specially coated to get the best color balance with a digital camera, while also cutting down flare and ghost caused by reflections from the digital image sensor and lens. It has correction for vignetting and superior peripheral brightness is ensured. Ideal as a standard quality zoom lens with added macro capability, this lens provides an equivalent range of approx. 28-80mm when used with a Canon digital SLR camera.

DC lenses are exclusively designed for digital SLR cameras. The image circle (rear of lens) is made to match the smaller dimensions used for the image sensor on digital cameras. As a result these lenses are also more compact and lightweight, and are better matched to digital SLR cameras.

• EX lens series denotes excellence of engineering and new technology
• Large aperture of f/2.8 throughout the entire zoom range
• Correction for various types of aberration provided by one SLD (Special Low Dispersion) glass element and two aspherical lenses
• Super Multi Layer (SML) coating reduces flare and ghosting from which digital cameras tend to suffer

Read more at Sigma
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