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B000GEBSFQ Price: $460.95 Score: 1000.000 Category: Electronics Rating: 5 Votes: 1 Find similar products Sigma 8mm f/3.5 EX DG Circular Fisheye Lens for Sigma SLR Cameras. From the Manufacturer This circular fisheye lens produces circular images with an angle of view of 180-degrees when attached to a full-frame digital or 35mm film SLR camera. It has a maximum aperture of f3.5, a minimum focusing distance of 5.5-inches and a maximum magnification of 4.6x. The special fisheye design allows maximum creative expression. Sigma's super multi-layer lens coating reduces flare and ghosting, a common problem with digital cameras. The new lens power layout reduces color aberrations. Providing excellent image quality for digital and film SLR cameras. This lens can be used for the scientific applications such as the solid angle measurements of cloud distribution over the sky, the vegetation distribution of the rain forest canopy, etc., due to the quantifiable angle/area relationship it produces. This lens has a gelatin filter holder at the rear, allowing the use of gelatin filters. DG (DG lens) These are large-aperture lenses with wide angles and short minimum focusing distances. With an abundance of peripheral illumination, they are ideal lenses for Digital SLR Cameras whilst retaining suitability for traditional 35mm SLRs. EX (EX lens) The exterior of this lens is EX-finished to denote the superior build and optical quality, and to enhance its appearance.	B000EGAMBW Availability: Currently unavailable Score: 14.706 Category: Electronics Rating: 3.9 Votes: 83 Find similar products Sigma 17-70mm f/2.8-4.5 DC IF Macro Lens for Canon Digital SLR Cameras. Product Description Sigma 17-70mm f/2.8-4.5 DC IF Macro Lens for Canon Digital SLR Cameras Amazon.com Designed for Canon digital SLR cameras, the Sigma 17-70mm f/2.8-4.5 macro lens performs superbly even in relatively low light conditions, such as indoors or at dusk. The lens incorporates an inner focusing system that provides a fast autofocus speed while also preventing the front of the lens from rotating. This makes it particularly suitable for use with circular polarizing filters and petal-shaped lens hoods. The lens is also equipped with a zoom lock switch that eliminates zoom creep during transportation. And thanks to the special low dispersion (SLD) element and two aspherical elements, the lens corrects for all types of aberrations and produces a high level of optical performance throughout the entire zoom range. Other features include a minimum focusing distance of 7.9 inches, a maximum magnification ratio of 1:2.3, and a multilayer lens coating that reduces flare and ghosting. All Sigma lenses carry a one-year warranty. Specifications Focal length: 17-70mm Focal length: 17-70mm Maximum aperture: f/2.8-4.5 Maximum aperture: f/2.8-4.5 Lens construction: 15 elements in 12 groups Lens construction: 15 elements in 12 groups Angle of view: 72.4 to 20.2 degrees (Sigma SD format) Angle of view: 72.4 to 20.2 degrees (Sigma SD format) Number of diaphragm blades: 7 Number of diaphragm blades: 7 Minimum aperture: f/22 Minimum aperture: f/22 Minimum focusing distance: 7.9 inches Minimum focusing distance: 7.9 inches Maximum magnification: 1:2.3 Maximum magnification: 1:2.3 Filter size: 72mm Filter size: 72mm Corresponding AF mounts: Canon Corresponding AF mounts: Canon Dimensions: 3.1 inches in diameter and 3.2 inches long Dimensions: 3.1 inches in diameter and 3.2 inches long Weight: 16.0 ounces Weight: 16.0 ounces Warranty: 1 year Warranty: 1 year.
B000CNI016 Price: $449.95 Score: 14.085 Category: Electronics Rating: 4.6 Votes: 132 Find similar products PENTAX DA 10-17mm f/3.5-4.5 ED (IF) Fish-Eye Lens for Pentax Digital SLR. Product Description With extra low dispersion glass and original lens coatings, this lens is superior in contrast, clarity and edge-to-edge sharpness. Amazon.com Capture fisheye imagery with a 180-degree angle of view with the Pentax DA 10-17mm fisheye lens. Designed for the Pentax *ist series of digital SLR cameras, the lens creates images with an expanded perspective, including images with a creatively deformed outlook and a sharp pan focus that extends throughout the entire frame. The image circle in DA series lenses, meanwhile, is designed to perfectly match the 23.5 x 15.7mm size of the CCD used in Pentax digital SLRs to optimize camera performance. Plus, the new design contributes to a drastic reduction in size, weight, and production cost compared to 35mm counterparts with similar specifications. Additional features include a 35mm equivalent focal length of 15-26mm; new water- and oil-repellant super-protective (SP) lens coatings for easy cleaning; extra-low-dispersion (ED) glass for superior sharpness and color correction; and a responsive Quick Shift Focus System for switching instantly from autofocus (AF) to manual focus (MF). Lens construction: 10 elements in 8 groups Lens construction: 10 elements in 8 groups Angle of view: 180 to 100 degrees Angle of view: 180 to 100 degrees Diaphragm: Fully automatic Diaphragm: Fully automatic Blades: 6 Blades: 6 Minimum aperture: f/22-32 Minimum aperture: f/22-32 Metering: TTL open-aperture meeting Metering: TTL open-aperture meeting Minimum focusing distance: 0.46 feet Minimum focusing distance: 0.46 feet Maximum magnification: 0.23x to 0.39x Maximum magnification: 0.23x to 0.39x Dimensions: 2.8 inches in diameter Dimensions: 2.8 inches in diameter Weight: 11.3 ounces Weight: 11.3 ounces.	B0067W0T38 Price: $124 Score: 12.658 Category: Electronics Rating: 4.4 Votes: 185 Find similar products Olympus M.Zuiko 17mm f/2.8 Lens. From the Manufacturer This wide-angle pancake lens has a convenient focal length (equivalent to 34mm on a 35mm camera) for shooting everything from landscapes and portraits to close ups. A slim design, with an overall length of just 22.5mm, ensures the camera remains compact and easy to carry even when the lens is mounted. With its digital-dedicated design and superior performance, this lens maximizes the camera’s performance for clear, high quality imaging.
B001BJDX7Q Availability: Currently unavailable Score: 12.658 Category: Electronics Rating: 4 Votes: 3 Find similar products Panasonic 14-150mm f/3.5-5.6 OIS Four Thirds Lens for Panasonic Digital SLR Cameras. From the Manufacturer Panasonic L-RS014150 14-150mm f/3.5-5.6 OIS Four Thirds Lens for Panasonic Digital SLM Cameras The First LEICA D Lens with Zoom Range to 300mm The versatile Panasonic L-RS014150 lens's soft focus is suitable for dimly lit indoor shots (View Larger) This powerful, large-diameter 10.7x telephoto LEICA D VARIO-ELMAR 14-150mm/ F3.5-5.6 ASPH./ MEGA O.I.S. camera lens offers an exceptionally long zoom range of 14-150mm (35mm equivalent: 28-300mm) and complies with the Four Thirds System to assure wide compatibility with other camera models. The new four thirds camera lens is the first LEICA D lens to incorporate Extra Silent (XS) technology, which assures quick, quiet, accurate auto focusing control from minimum focus distance of 50 cm even at full zoom to the entire zoom range. A Compact, Reliable and Light Weight Camera Lens The L-RS014150 is comprised of 15 lens elements in 11 groups with a circular aperture. (View Larger) The L-RS014150 camera lens contains 15 elements in 11 groups (4 Aspherical lenses and 1 ED lens) for a superb optical performance. Seven aperture blades give the aperture a rounded shape that, when shooting at larger aperture, produces an attractive smoothness in out-of-focus areas. This lightweight lens system offers exceptional zoom power yet is as compact as a standard zoom lens. Minimized Distortion The L-RS014150 automatically minimizes distortion at distance. (Click for More Information) The L-RS014150 interchangeable lens features MEGA O.I.S (optical image stabilizer); Panasonic's advanced hand-shake correction technology which makes it easy to shoot super-telephoto shots without using a tripod. The new lens system uses multi-coated lens elements that reduce ghosts and flare to an absolute minimum. It delivers high resolution from edge to edge along with low distortion and improved optical performance by minimizing distortion, even at the 28mm wide end. Lens Compatible with All Panasonic LUMIX G Series and Micro 4/3 Cameras* DMC-GH3K Body Panasonic LUMIX DMC-GH3 16.05 MP Digital Single Lens Mirrorless Camera with 3-Inch OLED DMC-G5K Body Only Panasonic LUMIX DMC-G5 16 MP Digital Single Lens Mirrorless Camera with 3-Inch LCD DMC-GH2K Body Only Panasonic LUMIX DMC-GH2 16.05 MP Live MOS Interchangeable Lens Camera DMC-GX1KK Panasonic LUMIX DMC-GX1 16 MP Micro 4/3 Compact System Camera with 3-Inch LCD Touch Screen; Black, 14-42mm Kit DMC-G3KW , DMC-G3KBODY , DMC-G3KK , DMC-GH2HK , DMC-GX1KBODY , DMC-GX1SBODY , DMC-GX1XK , DMC-GX1KS , DMC-GX1XS , DMC-GF5XR , DMC-GF5XK , DMC-GF5XW , DMC-GF5KW , DMC-GF5KK , DMC-GF5KR , DMC-GF3CT , DMC-GF3KR , DMC-GF3KBODY , DMC-GF3XK , DMC-GF3CR , DMC-GF3KW , DMC-GF3KT , DMC-GF3CW DMC-GF3CK , DMC-GF3KK , DMC-GF2CS , DMC-GF2KK , DMC-GF2CK , DMC-GF2CW , DMC-GF2KS , DMC-GF2CR Lens Comparison Chart LUMIX G X VARIO H-HS35100 LUMIX G X VARIO H-HS12035 LEICA D VARIO-ELMAR L-RS014150 LUMIX G VARIO HD H-VS014140 LUMIX G H-H020 Lens Construction 18 elements in 13 groups (2 ED lenses,1 UED lens) 14 elements in 9 groups (4 aspherical lenses, 1 UED lens, 1 UHR lens) 15 elements in 11 groups (4 aspherical Lenses, 1 ED Lens) 17 elements in 13 groups (4 aspherical lenses, 2 ED lenses) 7 elements in 5 groups (2 aspherical lenses) Nano Surface Coating YesYesn/aNo (Multi-coated)No (Multi-coated) Mount Micro Four Thirds MountMicro Four Thirds MountFull Four Thirds MountMicro Four Thirds MountMicro Four Thirds Mount Optical Image Stabilizer POWER O.I.S.POWER O.I.S.MEGA O.I.S.MEGA O.I.S.No Focal Length f=35-100mm (35mm camera equivalent 70-200mm)f=12-35mm (35mm camera equivalent 24-70mm)f=14-150mm (35mm camera equivalent 28-300mm)f=14-140mm (35mm camera equivalent 28-280mm)f=20mm (35mm camera equivalent 40mm) Aperture Type 7 Diaphragm blades / Circular aperture diaphragm7 Diaphragm blades / Circular aperture diaphragm 7 Diaphragm blades / Circular aperture diaphragm7 Diaphragm blades / Circular aperture diaphragm7 Diaphragm blades / Circular aperture diaphragm Maximum Aperture F2.8F2.8F3.5-5.6F4.0-5.8 F1.7 Minimum Aperture F22 F22 F22 F22 F16 Closest Focusing Distance 0.85m / 2.8 ft0.25m / 0.82 ft0.50m / 19.7 in at all Focal Lengths0.50m / 1.64 ft at all focal lengths0.2m / 0.66 ft Diagonal Angle of View 34°(W) to 12°(T)84°(W) to 34°(T)75°(W) ~ 8.2°(T)75°(W) ~ 8.8°(T) 57° Filter Size 58mm / 2.3 in58mm / 2.3 in72mm70mm / 2.76 in46mm / 1.81 in Max. Diameter Approx. 67.4mm / 2.7 in67.6mm / 2.7 in78.5mm / 3.09 in70mm / 2.76 in 63mm / 2.48 in Overall Length Approx. 99.9mm / 3.9 in (from the tip of the lens to the base side of the lens mount)Approx. 73.8mm / 2.9 in (from the top of the lens hood to the base side of the lens mount)3.56 inApprox. 84mm / 3.31 in (from the tip of the lens to the base side of the lens mount)Approx. 25.5mm / 1.00 in (from the tip of the lens to the base side of the lens mount) Weight Approx. 360g / 12.7oz (excluding lens cap, lens rear cap, lens hood)Approx. 305g / 10.8oz (excluding lens cap and lens rear cap)1.18 lbsApprox. 460g / 16.23oz3.53 oz Standard Accessories Lens front cap, Lens rear cap, Lens hood, Lens storage bagLens cap, Lens hood, Lens rear cap, Lens storage bagLens Cap, Lens Hood, Lens Rear Cap, Lens Storage BagLens Cap, Lens Hood, Lens Rear Cap, Lens Storage BagLens Cap, Lens Hood, Lens Rear Cap, Lens Storage Bag* Requires optional DMW-MA1 adaptor.	B0199BF87K Price: $998 Score: 12.346 Category: Electronics Rating: 4.4 Votes: 117 Find similar products Sony SEL35F14Z Distagon T FE 35mm f/1.4 ZA Standard-Prime Lens for Mirrorless Cameras. Product Description The 35mm focal length makes the Distagon T FE 35mm F1.4 ZA an excellent choice for a wide range of photography, from snapshots and landscapes to indoor portraits and night scenes-producing beautiful bokeh through its bright 9-blade F1.4 aperture. The advanced optical design-including a spherical and “AA” (advanced spherical) lens elements combined with renowned ZEISS T coating-deliver outstanding image resolution and suppresses reflections for superior contrast clarity. ZEISS T anti-reflective coating minimises flare From the Manufacturer Distagon T* FE 35mm F1.4 ZA Full-frame E-mount Prime Lens The 35mm focal length makes the Distagon T* FE 35mm F1.4 ZA an excellent choice for a wide range of photography, from snapshots and landscapes to indoor portraits and night scenes – producing beautiful bokeh through its bright 9- blade F1.4 aperture. The advanced optical design - including aspherical and “AA” (advanced spherical) lens elements combined with renowned ZEISS T* coating - deliver outstanding image resolution and suppresses reflections for superior contrast clarity. Additional Features Unmatched ZEISS T* (T-star) coating Coated optics were pioneered by Carl Zeiss - and this superb lens features the ZEISS T* (T-Star) coating that virtually eliminates lens flare, internal reflection and light scattering that can otherwise occur at glass-to-air surfaces. The T* coating contributes to outstanding image quality, with high contrast and uniformly excellent resolution right out to the image edges. Not simply applied to any lens - the T* symbol only appears on multi-element lenses in which the required performance has been achieved throughout the entire optical path, therefore guaranteeing the highest quality. Circular Aperture When changing your aperture to defocus the background, the light sources appear blurred. This ‘bokeh’ effect of the blurred background can be enhanced with circular aperture blades used in this lens. Conventional aperture blades have flat sides creating unappealing polygonal shaped defocussed points of light. α lenses overcome this problem through a unique design that keeps the aperture almost perfectly circular from its wide-open setting to when it is closed by 2 stops. Smoother, more natural defocusing can be obtained as a result. Aspherical lens elements Aspherical lens design dramatically reduces spherical aberration while also reducing lens size and weight. Spherical aberration is a slight misalignment of the light rays projected on the image plane. This is caused by differences in refraction at different points on conventional spherical lenses which degrade image quality in large-aperture lenses. Specially shaped “aspherical” elements near the diaphragm restore alignment of light rays at the image plane, maintaining high sharpness and contrast even at maximum aperture and can also be used at other points in the optical path to reduce distortion. Well-designed aspherical elements can reduce the total number of elements required in the lens, thus reducing overall size and weight. Responsive aperture ring A responsive aperture ring offers positive action that will satisfy professional photographers and moviemakers alike. The aperture ring click stops can be switched on or off as required. “Off” is the preferred setting for moviemaking since it results in the least aperture operation noise. When “On” the ring provides tactile feedback that is useful when shooting stills. 2015 Sony Electronics Inc. All rights reserved. Reproduction in whole or in part without written permission is prohibited. Sony is not responsible for typographical and photographic errors. Features and specifications are subject to change without notice. All rights reserved. Sony, the Sony logo, (alpha) logo, and SteadyShot are trademarks of Sony. Carl ZEISS and ZEISS is a trademark of Carl Zeiss and Sony Corporation. All other trademarks are trademarks of their respective owners.
B000CD6B80 Availability: Currently unavailable Score: 12.346 Category: Electronics Rating: 4.2 Votes: 7 Find similar products Sigma 80-400mm f/4.5-5.6 EX OS APO RF Telephoto Zoom Lens for Nikon SLR Cameras. Product description The new multi layer lens coating and lens design reduce flare and ghost, which is a common problem with digital cameras and also creates an optimum color balance through the entire zoom range. Two types of camera-shake compensation modes to handle all types of shooting conditions. In Mode 1, the system detects and compensates for vertical and horizontal movement of the camera for ideal still-image photography. In Mode 2, the system detects and compensates for vertical movement of the camera for motor sports and other situations where panning may be desired. OS system can be used with Nikon cameras, which are compatible with image blurring compensation mechanism. This lens has two SLD (Special Low Dispersion) glass elements in the front lens group and one in the rear lens group for correction of chromatic aberration throughout the entire zoom range. The rear focus eliminates the need for the front of the lens to rotate, thus allowing the use of circular polarizing filter. A zoom lock switch is built in to prevent the lens from extending due to its own weight, and the lens is easier to use. 9 Diaphragm Blades Minimum Aperture F32 Minimum Focusing Distance - 180cm (70.9 inches) Maximum Magnification - 1 - 5 Filter Size - Diameter 77mm Dimensions - Diameter 95mm x Length 192mm, 3.7 x 7.6 inches Weight - 1750 grams (61.9 ounces) Amazon.com The Sigma APO 80-400mm F4.5-5.6 EX DG OS Lens for Nikon Digital SLR Cameras is a telephoto zoom lens with an F4 aperture throughout the entire zoom range. It also has performance features that are perfect for digital and 35mm SLR cameras. Two SLD (Special Low Dispersion) glass elements are used in the front lens group and two in the rear lens group for superior correction of chromatic aberration. Because its length does not change during focusing or zooming, the lens is easy to hold and use. The Hyper Sonic Motor (HSM) makes fast AF speeds and quiet shooting a reality, and it is also capable of full-time manual focus.	B000DZH7J4 Price: $229.99 Score: 12.195 Category: Electronics Rating: 4.2 Votes: 34 Find similar products Sony 100mm f/2.8 Macro Lens for Sony Alpha Digital SLR Camera. Amazon.com Get incredibly close to small subjects with the Sony 100mm macro lens, which delivers professional results in almost any shooting situation. The versatile macro focus lens covers a wide range of photographic applications, from close-up nature subjects to midrange telephoto shots, making it ideal for carrying on location or in the field. The lens's bright f/2.8 maximum aperture works in conjunction with the Sony Alpha's Super SteadyShot image stabilization system to capture bright, steady images even when working with handheld cameras in low light. Specific details include a focus range limiter that speeds up the autofocus response by limiting the range of distances that are brought into focus; a focus hold button that gives you full creative control; an auto clutch option with a manual focus ring that doesn't rotate; a circular aperture that provides a pleasing circular defocused effect that's ideal for low-light shots; and excellent optical precision that gives your shots greater visual accuracy. Focal length: 150mm (100mm 35mm equivalent) Focal length: 150mm (100mm 35mm equivalent) Filter diameter: 55mm Filter diameter: 55mm Minimum focus distance: 1 foot, 2.4 inches Minimum focus distance: 1 foot, 2.4 inches Magnification: 1x Magnification: 1x Lens group elements: 8 groups 8 elements Lens group elements: 8 groups 8 elements Distance scale: Yes Distance scale: Yes Distance encoder: Yes Distance encoder: Yes Non-rotating focusing ring: Yes Non-rotating focusing ring: Yes Focus hold button: Yes Focus hold button: Yes Depth of field: Yes Depth of field: Yes Focus range limiter: Yes Focus range limiter: Yes Maximum aperture: f/2.8 Maximum aperture: f/2.8 Minimum aperture: f/32 Minimum aperture: f/32 Blades: 9 aperture Blades: 9 aperture Asperhic elements: No Asperhic elements: No Lens type: Macro Lens type: Macro Dimensions: 3 inches in diameter and 4 inches long Dimensions: 3 inches in diameter and 4 inches long Weight: 1 pound, 2 ounces Weight: 1 pound, 2 ounces From the Manufacturer 100mm F2.8 Macro Lens This 100mm F2.8 Macro lens offers a greater working distance so you can capture tight macro shots of small-scale wildlife without scaring subjects away, and you're not so close that you need special lighting to illumniate your subject. It's also a first-class telephoto lens for normal shooting and is a good choice for portraits or other subjects that require a bit more reach. Technology Circular Aperture When changing your aperture to defocus the background, the light sources appear blurred. This ‘bokeh’ effect of the blurred background can be enhanced with circular aperture blades used in this lens. Conventional aperture blades have flat sides creating unappealing polygonal shaped defocussed points of light. α lenses overcome this problem through a unique design that keeps the aperture almost perfectly circular from its wide-open setting to when it is closed by 2 stops. Smoother, more natural defocusing can be obtained as a result. Focus hold button Once you’ve adjusted focus to where you want it, pressing this button on the lens barrel will keep the lens locked to that focusing distance. The preview function can also be assigned to this button through the camera’s custom settings. Focus range limiter This function allows you to set a limit on the focusing range which can save you time during AF operation as the lens will not ‘hunt’ through the entire focusing range. In macro lenses, this limit can be on either the near or far range (as pictured). In the SAL70200G, the limit is set on far ranges only. In the SAL300F28G, focusing can be limited either to a far range or to a range that you specify yourself. Distance encoder The distance encoder plays an integral part in ADI flash metering, which delivers high precision flash metering that is unaffected by the reflectance of subjects or backgrounds. The distance encoder is a lens component that directly detects the position of the focusing mechanism, and sends a signal to the CPU in order to measure distance to the subject. During flash photography, this data is very useful in calculating how much flash output is appropriate to the scene. 2008 Sony Electronics, Inc. All rights reserved. Sony, the Sony logo, Alpha, “α” and Super SteadyShot are trademarks of Sony. All other trademarks are trademarks of their respective owners.
B00D6BPCTE Availability: Currently unavailable Score: 12.048 Category: Electronics Rating: 4.1 Votes: 36 Find similar products Samyang SY8M-P 8mm f3.5 Lens for Pentax,Black. The NEW Samyang 8mm Ultra Wide Angle Fisheye Lens is the most affordable 8mm Fisheye Lens in the market. It features the widest field of view over any other 8mm fisheye lens, and its build quality and optical construction are superb. The Samyang 8mm lens is designed for digital SLR cameras with APS-C image sensors. For these types of cameras, it provides full-frame coverage - which means that pictures will cover the entire frame. It is also compatible with cameras that have a full-frame sensor. For cameras with full-frame sensors, the lens will produce pictures with a semi-circular image and close images will appear proportionately large for a dramatic effect. The Samyang 8mm lens creates images with an expanded and exaggerated perspective and an extremely wide 180 Degree angle of view. The lens is available for the following mounts: Canon EOS, Nikon with auto confirm chip, Sony Alpha, Pentax & Olympus 4/3.	B000JE5CKA Price: $998 Score: 12.048 Category: Electronics Rating: 3.8 Votes: 67 Find similar products Sony 16-80mm f/3.5-4.5 Carl Zeiss Vario-Sonnar T DT Zoom Lens for Sony Alpha Digital SLR Camera. Product Description D1) SONY 16-80MM 3.5-4 ZEISS Lens From the Manufacturer Vario-Sonnar T* DT 16-80mm F3.5-4.5 ZA Zoom Lens The lightest and most compact zoom in the Carl Zeiss lineup, this lens offers the greatest zoom range making it a superb single-lens solution for many photographers. It delivers acclaimed Carl Zeiss optical performance and handling with image quality that rivals the best prime lenses at any focal length. Technology Circular Aperture When changing your aperture to defocus the background, the light sources appear blurred. This ‘bokeh’ effect of the blurred background can be enhanced with circular aperture blades used in this lens. Conventional aperture blades have flat sides creating unappealing polygonal shaped defocussed points of light. α lenses overcome this problem through a unique design that keeps the aperture almost perfectly circular from its wide-open setting to when it is closed by 2 stops. Smoother, more natural defocusing can be obtained as a result. Aspherical lens elements Aspherical lens design dramatically reduces spherical aberration while also reducing lens size and weight. Spherical aberration is a slight misalignment of the light rays projected on the image plane. This is caused by differences in refraction at different points on conventional spherical lenses which degrade image quality in large-aperture lenses. Specially shaped “aspherical” elements near the diaphragm restore alignment of light rays at the image plane, maintaining high sharpness and contrast even at maximum aperture and can also be used at other points in the optical path to reduce distortion. Well-designed aspherical elements can reduce the total number of elements required in the lens, thus reducing overall size and weight. Advanced Aspherical (AA) elements are an evolved variant, featuring an extremely high thickness ratio between the center and periphery. AA elements are exceedingly difficult to produce, relying on the most advanced molding technology to consistently and precisely achieve the required shape and surface accuracy, resulting in significantly improved image accuracy and quality. Carl Zeiss T* (T-star) coating Coated optics were pioneered by Carl Zeiss - and this superb lens features the Carl Zeiss T* (T-Star) coating that virtually eliminates lens flare, internal reflection and light scattering that can otherwise occur at glass-to-air surfaces. The T* coating contributes to outstanding image quality, with high contrast and uniformly excellent resolution right out to the image edges. Not simply applied to any lens - the T* symbol only appears on multi-element lenses in which the required performance has been achieved throughout the entire optical path, therefore guaranteeing the highest quality. Distance encoder The distance encoder plays an integral part in ADI flash metering, which delivers high precision flash metering that is unaffected by the reflectance of subjects or backgrounds. The distance encoder is a lens component that directly detects the position of the focusing mechanism, and sends a signal to the CPU in order to measure distance to the subject. During flash photography, this data is very useful in calculating how much flash output is appropriate to the scene. Additional Features Internal focusing Only the middle groups of the optical system move to achieve focus, so the overall length of the lens does not change. Other important benefits include fast autofocusing and a short minimum focusing distance. Also, the filter thread at the front of the lens does not rotate, which is convenient if you’re using a polarizing filter. 2006 Sony Electronics, Inc. All rights reserved. Sony, ± (alpha) system and Super SteadyShot are trademarks of Sony. All other trademarks are trademarks of their respective owners.