An ultra-telephoto lens with an optical stabilizer (OS) system has several advantages. The OS allows the photographer to take photographs in unstable circumstances. The narrow angle of view makes it possible to dramatically compress perspective & flexible handling of the background. The photographer can thereby make the subject appear to jump out of the image, with the area in focus impressively sharp & clear. This lens offers the compact size, lightweight, & high cost performance of a 70-300mm lens while delivering 400mm telephoto performance. This approach results in a tempting new ultra-telephoto choice for photographers. Offering a combination of stunning image quality & outstanding functionality, this lens satisfies the needs of pros & amateurs alike. Compact packaging with uncompromising image quality In designing this lens, SIGMA strived to push both compactness & image quality to the limit. Four SLD glass lens elements & an optimized power distribution help minimize optical aberrations. Moreover, by taking special care to minimize transverse chromatic aberration, which cannot be corrected via aperture control, SIGMA has ensured outstanding image quality throughout the zoom range. Telephoto plus macro functionality With a minimum shooting distance of 160cm & a maximum magnification ratio of 1:3.8, this lens can shoot either from a distance or up close. Exclusive low-dispersion glass The degree to which light is refracted by glass depends on the lights wavelength. This fact causes different colors of light to focus at slightly different points. The result is chromatic aberration, the color fringing that is particularly noticeable in telephoto lenses. Most chromatic aberration can be removed by combining a high-refractivity convex lens element with a low-refractivity concave element. Yet residual chromatic aberration known as secondary spectrum may still remain. To minimize this secondary spectrum, which can be a serious issue with conventional lenses, SIGMA lenses feature up to three types of exclusive low-dispersion glass offering superior performance: ELD (Extraordinary Low Dispersion), SLD (Special Low Dispersion) & FLD (F Low Dispersion). In particular, FLD glass offers ultra-low dispersion in combination with high transmittance & the anomalous dispersion characteristics of fluorite. Meticulous deployment of these types of exclusive low-dispersion glass & optimization of power distribution gives SIGMA lenses superlative image rendition undiminished by residual chromatic aberration. Designed to minimize flare & ghosting SIGMAs Super Multi-Layer Coating helps further reduce flare & ghosting & provide sharp, high-contrast images even in backlit conditions. All-new optical stabilizer (OS) unit with exclusive algorithm Featuring a newly developed gyroscopic sensor & a new & exclusive algorithm, the all-new OS unit provides a powerful stabilization effect. An acceleration sensor detects camera shake in any direction
- horizontal, vertical, or diagonal. This technology allows the OS to stabilize the image very effectively, regardless of whether the camera is being held in horizontal or vertical orientation. Push/pull zoom mechanism incorporated For quick control of the angle of view, the zoom ring incorporates a push/pull mechanism in addition to the regular twist mechanism. The exclusive lens hood has also been designed to accommodate push/pull zooming & overall lens maneuverability. By making it possible to adjust the angle of view instantly, this lens gives photographers an even better chance of getting that crucial shot. Rounded diaphragm The 9-blade rounded diaphragm creates an attractive blur in the out-of-focus areas of the image. Smoother AF operation The HSM (Hyper Sonic Motor) ensures high speed & quiet AF. The updated algorithm enables smoother AF operation. High-precision, rugged brass bayonet mount The brass mount combines high precision with rugged construction. Its treated surfaces & enhanced strength contribute to the exceptional durability of the lens. Dust-proof & splash-proof mount. The lens mount incorporates rubber sealing* to protect the mount from dust & water drops. * Except for the SIGMA mount
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High performance, large aperture medium telephoto macro lens incorporating Sigma’s Optical Stabiliser function. Sigma’s medium telephoto macro lens incorporates Optical Stabilisation allowing the use of shutter speeds Approx. 4 stops slower than would otherwise be possible. SLD glass provides good control of aberration & the floating inner focus system ensures high rendering throughout the focusing range. By using Sigma’s APO Tele Converters, it is possible to take photos at greater than 1:1 magnification. HSM ensures a quiet & high speed AF as well as full-time manual focus override. This lens has a rounded 9 blades diaphragm which creates an attractive blur to the out of focus areas. Large aperture medium telephoto macro lens This medium telephoto macro lens means that you can maintain an appropriate distance from subjects while still getting close up photos. Since the working distance at its closest focusing position is 142mm, shadows of the lens & camera will not affect photography making it suitable for taking photos of subjects, such as flowers, under natural lighting conditions. In comparison to the Sigma 50mm & 70mm macro lenses, the main subjects can be defined with perfectly smooth & blurred backgrounds. High rendering performance The lens power layout produces excellent optical performance. High refractive index SLD (Special Low Dispersion) glass corrects chromatic aberration, spherical aberration & field curvature. It ensures high rendering performance at all shooting distances. The Super Multi-Layer Coating reduces flare & ghosting, maintaining quality images with high contrast. Handheld photography with ease Sigma’s OS (Optical Stabiliser) system offers effective correction of Approx. 4 stops. As the stabilisation effect is visible through the viewfinder, it aids composition & accurate focusing. * The OS effectiveness will gradually decrease as the shooting distance becomes shorter. Floating inner focusing This lens incorporates floating inner focusing which moves two lens groups separately. This minimises aberrations which occur as shooting distance changes & enables stable rendering of the image from infinity to 1:1 magnification. This also corrects image distortion, especially when taking close-up pictures. Since focusing does not change its overall length, this lens is easy to hold & use. Quiet & high-speed AF The HSM (Hyper Sonic Motor) provides quiet & high speed autofocus. It is also possible to use full-time manual focus, even if the lens is set to the AF position. Rounded 9 blades diaphragm This lens has a rounded 9 blade diaphragm which creates an attractive blur to the out of focus areas. This also creates smooth, rounded out of focus highlights when taking photos which have a strong light source in the background such as lights shining on the surface of water. APO Tele converters This lens is compatible with Sigma’s APO Tele Converters. With APO Tele Converter 1.4x EX DG, it can be used as 147mm F4 AF* telephoto macro lens, & APO Tele Converter 2x EX DG as 210mm F5.6 MF telephoto macro lens. This allows a greater working distance while still achieving 1:1 macro magnification. *AF does not work from 0.45m close up photography. Dedicated hood adapter When taking photos with APS-C sized digital SLRs, the (supplied) dedicated hood adapter, which extends the length of the hood can be attached. This gives more protection from harmful light that could negatively affect image quality. * When taking photos with full-size digital SLR, please remove HA680-01 in order to avoid the edges of image being blocked. ...

High performance, large aperture medium telephoto macro lens incorporating Sigma’s Optical Stabiliser function. Sigma’s medium telephoto macro lens incorporates Optical Stabilisation allowing the use of shutter speeds Approx. 4 stops slower than would otherwise be possible. SLD glass provides good control of aberration & the floating inner focus system ensures high rendering throughout the focusing range. By using Sigma’s APO Tele Converters, it is possible to take photos at greater than 1:1 magnification. HSM ensures a quiet & high speed AF as well as full-time manual focus override. This lens has a rounded 9 blades diaphragm which creates an attractive blur to the out of focus areas. Large aperture medium telephoto macro lens This medium telephoto macro lens means that you can maintain an appropriate distance from subjects while still getting close up photos. Since the working distance at its closest focusing position is 142mm, shadows of the lens & camera will not affect photography making it suitable for taking photos of subjects, such as flowers, under natural lighting conditions. In comparison to the Sigma 50mm & 70mm macro lenses, the main subjects can be defined with perfectly smooth & blurred backgrounds. High rendering performance The lens power layout produces excellent optical performance. High refractive index SLD (Special Low Dispersion) glass corrects chromatic aberration, spherical aberration & field curvature. It ensures high rendering performance at all shooting distances. The Super Multi-Layer Coating reduces flare & ghosting, maintaining quality images with high contrast. Handheld photography with ease Sigma’s OS (Optical Stabiliser) system offers effective correction of Approx. 4 stops. As the stabilisation effect is visible through the viewfinder, it aids composition & accurate focusing. * The OS effectiveness will gradually decrease as the shooting distance becomes shorter. Floating inner focusing This lens incorporates floating inner focusing which moves two lens groups separately. This minimises aberrations which occur as shooting distance changes & enables stable rendering of the image from infinity to 1:1 magnification. This also corrects image distortion, especially when taking close-up pictures. Since focusing does not change its overall length, this lens is easy to hold & use. Quiet & high-speed AF The HSM (Hyper Sonic Motor) provides quiet & high speed autofocus. It is also possible to use full-time manual focus, even if the lens is set to the AF position. Rounded 9 blades diaphragm This lens has a rounded 9 blade diaphragm which creates an attractive blur to the out of focus areas. This also creates smooth, rounded out of focus highlights when taking photos which have a strong light source in the background such as lights shining on the surface of water. APO Tele converters This lens is compatible with Sigma’s APO Tele Converters. With APO Tele Converter 1.4x EX DG, it can be used as 147mm F4 AF* telephoto macro lens, & APO Tele Converter 2x EX DG as 210mm F5.6 MF telephoto macro lens. This allows a greater working distance while still achieving 1:1 macro magnification. *AF does not work from 0.45m close up photography. Dedicated hood adapter When taking photos with APS-C sized digital SLRs, the (supplied) dedicated hood adapter, which extends the length of the hood can be attached. This gives more protection from harmful light that could negatively affect image quality. * When taking photos with full-size digital SLR, please remove HA680-01 in order to avoid the edges of image being blocked. ...

Ultra telephoto zoom lens covering a telephoto range up to 500 mm. This ultra-telephoto zoom lens covers a telephoto range up to 500 mm. & allows photographers to bring the subject close with short perspective. Sigmas original OS (Optical Stabilizer) function offers the equivalent of using a shutter speed Approx. 4 stops faster. It is ideal for sports, wildlife & landscape photography with handheld shooting. ...

On the one h&, the product concept of the SIGMA 150-600mm F5-6.3 DG OS HSM Sports is to achieve the best optical & action-capture performance to meet the requirements of professional photographers. On the other h&, that of the SIGMA 150-600mm F5-6.3 DG OS HSM Contemporary is to achieve a lightweight & compact construction for higher usability with similar specifications. It has put a special emphasis on its optical performance by incorporation of 1 FLD & 3 SLD glass elements, optimization of lens power distribution & minimized chromatic aberration of magnification. An issue for hyper-telephoto lenses in particular at the telephoto end, optical aberrations have been minimized throughout the zoom range. Dust- & splash-proof to facilitate photography in the field & featuring a detachable tripod socket for more convenient handheld photography, this lens is a lightweight high-performance mo Lightweight & compact construction for higher usability Compared to the SIGMA 150-600mm F5-6.3 DG OS HSM Sports, it is more compact & lightweight, enabling easy handling & making it possible to do handheld photography for a longer period of time. The tripod socket is detachable so that the lens can be carried by itself. Without the tripod socket, it also fits well into limited space for storage. Moreover, the tripod socket is made from magnesium which is light & strong at the same time. The tripod socket may be detached & replaced with a rubber protective cover PT-11 to further reduce weight & make handheld photography an even more lightweight & convenient experience. This lens is the optimal choice for photographers who desire hyper-telephoto functionality while staying light on their feet. Intelligent OS featuring updated algorithm The OS (Optical Stabilizer) function features an acceleration sensor to ensure even higher precision. Two OS modes are available: Mode 1 for general photography & Mode 2 for motor sports & other applications requiring panning. In Mode 2, the acceleration sensor teams up with the Intelligent OS & its updated stabilization algorithm to deliver effective stabilization while you move the camera horizontally, vertically, or diagonally—regardless of the position of the lens. This feature helps ensure effective panning & outstanding capture of moving subjects. Note: This lens is incompatible with film SLR cameras with the exception of the Nikon F6 & Canon EOS-1V. Zoom lock switch can be set at any focal length The new zoom lock switch enables the zoom ring to be locked at any focal length. It can be fixed at the photographers desirable focal length, which allows stable shooting whether the lens is positioned upward or downward. It also helps during long exposure photography. Water & oil-repellent coating ensures pleasant photography experience Forefront & rear lenses incorporate a water & oil-repellent coating that allows water to be wiped away easily & prevents oil & fat from sticking to the surface, even in challenging shooting conditions. At the same time, the maintenance of the lens surface becomes easier. ...

Dust & splash-proof, zoom lock at every focus distance, water-repellent coating, compatibility with the new tele converters, new OS system with accelerometer, easily accessible manual over-ride switch, optimized auto focusing, telephoto shooting at 600mm, minimized chromatic aberration for higher optical performance & enhanced enjoyment with beautiful build quality. Since telephoto zoom lenses are often used under very challenging situations, this model has crystalized all the possible qualities & features to achieve the best optical & action-capture performance. While combining high portability & durability, this high-performance hyper-telephoto zoom lens from our Sports line offers outstanding rendering capabilities. Its versatility provides better flexibility for wider shooting scenes, & the high-performance definitely stimulates photographers artistic expression. Achieves the best optical performance that embodies the product concept of our Sports line This lens incorporates 2 FLD (“F” Low Dispersion) glass elements, which have performance equal to fluorite, & 3 SLD (Special Low Dispersion) glass elements, & compensates for color aberration at the utmost. Chromatic aberration in particular, which could be visible especially towards the telephoto-end even when stopped down, is corrected by the optimized design of glass elements including FLD lenses. Dust-proof & splash-proof construction It is Dust & splash-proof, & designed for higher durability. It is able to meet the demands that professional photographers would require in challenging shooting conditions, such as in the rain. Zoom lock switch can be set at any focal length The new zoom lock switch enables the zoom ring to be locked at any focal length. It can be fixed at the photographers desirable focal length, which allows stable shooting whether the lens is positioned upward or downward. It also helps during long exposure photography. Water & oil-repellent coating ensures pleasant photography experience Forefront & rear lenses incorporate a water & oil-repellent coating that allows water to be wiped away easily & prevents oil & fat from sticking to the surface, even in challenging shooting conditions. At the same time, the maintenance of the lens surface becomes easier. Manual override incorporated to make two full-time manual modes switchable In addition to AF/MF, MO (Manual Override) is incorporated as one of the options of the focus mode switch. By setting it to the MO position, it switches to manual focus by rotating the focus ring even during continuous AF. With AF position, standard full-time manual focus is available. Using the optional SIGMA USB (Universal Serial Bus) DOCK, it is possible to adjust the MO positions sensitivity to switch to manual focus. ...

Super compact & lightweight, large aperture telephoto lens with life-size macro capability. Successor to the APO MACRO 150mm F2.8 EX DG HSM, introduced to market in October 2004, this new OS design offers the latest optical technology. A floating focusing system moves two different lens groups in the optical path to different positions. This system compensates for astigmatic aberration & spherical aberration & provides extremely high optical performance from infinity to 1:1 Macro. SLD glass & Super Multi Layer Coating Three SLD (Special Low Dispersion) glass elements provide excellent correction of all types of aberrations & the Super Multi-Layer Coating reduces flare & ghosting. This lens has superior peripheral brightness & provides sharp, high contrast images even at the maximum apertures. Optical Stabiliser Equipped with Sigmas proprietary OS (Optical Stabiliser) function, this lens offers the use of shutter speeds Approx. 4 stops slower than would otherwise be possible. F2.8 large aperture tele-macro lens Tele macro lenses have a greater working distance. It is possible to enjoy Macro photography, even when you are far from subject. This enables you to capture the small animals & insects without disturbing them. Very narrow depth-of-field allows selective focusing & less distracting backgrounds. Large aperture of F2.8 is ideal for sports, action & indoor photography. Hyper Sonic Motor (HSM) with full time manual focus override The HSM (Hyper Sonic Motor) ensures quiet & high speed autofocus as well as full-time manual focus capability. Floating Focusing System produces excellent optical performance A floating focusing system moves two different lens groups in the optical system to different positions. This system compensates for astigmatic aberration & spherical aberration. Since focusing does not change its overall length, this lens is easy to hold & use. Rounded 9 blade aperture ring This lens has a rounded 9 blade diaphragm creating a smooth blur to the out of focus areas of the image. It is also possible to use this lens with Sigmas optional APO Tele Converters. APO Tele-Converter EX (optional) It is also possible to use this lens with Sigma 1.4x EX & 2x EX APO Tele-Converter. When this lens is used with the 1.4x EX or 2x EX Apo Tele Converters (optional), it becomes a 210mm F4 AF tele-macro lens or a 300mm F5.6 MF tele-macro lens respectively. Specifications Lens Construction: 9 Elements in 13 Groups Angle of View: 16.4 degrees Number of Diaphragm Blades: 9 Blades Minimum Aperture: F22 Minimum Focusing Distance: 38cm Maximum Magnification: 1:1 Filter

Size: 72mm Dimensions: Diameter 79.6mm X Length 150mm Weight: 1, 150g

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Large aperture standard zoom lens with a minimum focal length of 17mm, designed exclusively for digital SLR cameras & incorporating Sigmas original Optical Stabiliser system. The OS function offers the use of shutter speeds Approx. 4 stops slower than would otherwise be possible. The lens has a compact construction with an overall length of 91.8mm making it ideal for travel photography. Two FLD (“F” Low Dispersion) glass elements, two glass mold & one hybrid aspherical lens provide excellent correction for all types of aberrations. This lens has superior peripheral brightness & provides sharp & high contrast images even at the maximum apertures. The incorporation of HSM (Hyper Sonic Motor) provides fast & quiet AF. FLD (“F” Low Dispersion) glass elements FLD glass is the highest level low dispersion glass available with extremely high light transmission. This optical glass has a performance equal to fluorite glass which has a low refractive index & low dispersion compared to current optical glass. It also benefits from high anomalous dispersion. These characteristics give excellent correction for residual chromatic aberration (secondary spectrum) which cannot be corrected by ordinary optical glass & ensures high definition & high contrast images. This lens incorporates two FLD glass elements, which compensate for colour aberration. In addition, two glass mold elements & one hybrid aspherical lens give excellent correction for field curvature & astigmatism. High definition images are ensured throughout the entire zoom range. Sigmas unique Optical Stabiliser technology The lens is equipped with Sigmas own unique OS function. This system allows the photographer to use shutter speeds Approx. 4 stops slower that would otherwise be possible. Large aperture throughout the entire zoom range The large F2.8 aperture allows the use of fast shutter speeds & provides a bright viewfinder image, helping the photographer confirm accurate focusing. It is also ideal for emphasizing the subject by creating a natural, blurred background. Covering a wide range of focal lengths This lens covers a wide range of focal lengths from 17mm & has an equivalent angle of view of a 25.5-75mm with a 35mm SLR camera. It is ideal for general photography as well as portraits & landscapes. * The angle of view varies depending on which camera the lens is mounted on. Compact construction The lens has a compact construction with a diameter of 83.5mm, overall length of 91.8mm & weight of 565g. This compact & lightweight construction makes it absolutely ideal for travel photography. Super Multi-Layer Coating & superior peripheral brightness The Super Multi-Layer Coating reduces flare & ghosting as well as providing sharp & high contrast images throughout the entire zoom range. This lens also benefits from superior peripheral brightness & provides sharp & high contrast images even at the maximum apertures. Fast & quiet AF with internal focusing The lens incorporates HSM (Hyper Sonic motor), ensuring fast & quiet AF. The inner focusing system eliminates front lens ration, making the lens particularly suitable for using the supplied petal-type hood & circular polarising filters. * For Pentax mount, AF will not function with DSLR cameras that do not support HSM. Close focusing capability This lens has a minimum focusing distance of 28cm throughout the entire zoom range & a maximum magnification ratio of 1:5. Rounded diaphragm This lens has rounded 7 blade diaphragm which creates an attractive bokeh to the out of focus area of the image. * Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras. ...

Large aperture standard zoom lens with a minimum focal length of 17mm, designed exclusively for digital SLR cameras & incorporating Sigmas original Optical Stabiliser system. The OS function offers the use of shutter speeds Approx. 4 stops slower than would otherwise be possible. The lens has a compact construction with an overall length of 91.8mm making it ideal for travel photography. Two FLD (“F” Low Dispersion) glass elements, two glass mold & one hybrid aspherical lens provide excellent correction for all types of aberrations. This lens has superior peripheral brightness & provides sharp & high contrast images even at the maximum apertures. The incorporation of HSM (Hyper Sonic Motor) provides fast & quiet AF. FLD (“F” Low Dispersion) glass elements FLD glass is the highest level low dispersion glass available with extremely high light transmission. This optical glass has a performance equal to fluorite glass which has a low refractive index & low dispersion compared to current optical glass. It also benefits from high anomalous dispersion. These characteristics give excellent correction for residual chromatic aberration (secondary spectrum) which cannot be corrected by ordinary optical glass & ensures high definition & high contrast images. This lens incorporates two FLD glass elements, which compensate for colour aberration. In addition, two glass mold elements & one hybrid aspherical lens give excellent correction for field curvature & astigmatism. High definition images are ensured throughout the entire zoom range. Sigmas unique Optical Stabiliser technology The lens is equipped with Sigmas own unique OS function. This system allows the photographer to use shutter speeds Approx. 4 stops slower that would otherwise be possible. Large aperture throughout the entire zoom range The large F2.8 aperture allows the use of fast shutter speeds & provides a bright viewfinder image, helping the photographer confirm accurate focusing. It is also ideal for emphasizing the subject by creating a natural, blurred background. Covering a wide range of focal lengths This lens covers a wide range of focal lengths from 17mm & has an equivalent angle of view of a 25.5-75mm with a 35mm SLR camera. It is ideal for general photography as well as portraits & landscapes. * The angle of view varies depending on which camera the lens is mounted on. Compact construction The lens has a compact construction with a diameter of 83.5mm, overall length of 91.8mm & weight of 565g. This compact & lightweight construction makes it absolutely ideal for travel photography. Super Multi-Layer Coating & superior peripheral brightness The Super Multi-Layer Coating reduces flare & ghosting as well as providing sharp & high contrast images throughout the entire zoom range. This lens also benefits from superior peripheral brightness & provides sharp & high contrast images even at the maximum apertures. Fast & quiet AF with internal focusing The lens incorporates HSM (Hyper Sonic motor), ensuring fast & quiet AF. The inner focusing system eliminates front lens ration, making the lens particularly suitable for using the supplied petal-type hood & circular polarising filters. * For Pentax mount, AF will not function with DSLR cameras that do not support HSM. Close focusing capability This lens has a minimum focusing distance of 28cm throughout the entire zoom range & a maximum magnification ratio of 1:5. Rounded diaphragm This lens has rounded 7 blade diaphragm which creates an attractive bokeh to the out of focus area of the image. * Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras. ...

As entry level lenses for digital SLR cameras, standard zoom lenses are capable of many types of photography. With this lens, you can enjoy the variation of different angle-of-views covering from a wide-angle of 18mm (equivalent to 27mm on a 35mm camera) to a telephoto of 200mm (equivalent to 300mm on a 35mm camera), as well as Macro. Moreover, thanks to the OS (Optical Stabilizer) functionality, while pursuing convenience of handheld photography for close-up, indoor & night time photography, SIGMA incorporated the latest technology freely in order to achieve its compact size as an everyday lens. SIGMA proposes a new standard zoom lens. Diameter reduced by 4.6mm compared to its predecessor We pursued the compactness as an ideal everyday lens. From an early stage of development, SIGMA was determined to make the lens size compact, for example, by incorporating double-sided aspherical lens elements & downsizing the motor. As a result, while the predecessor had a diameter of 75.3mm, this lens has reduced it to 70.7mm, which has the difference of 4.6mm. It also achieves -11% in volume ratio compared to its predecessor. It is one of the smallest in its class of lenses with more than a 7x zoom ratio, & is more comparable in size to a generic standard zoom lenses. High rendering performance throughout the entire zoom range With our Contemporary line, the lens is required to fulfill the maximum potential while achieving a compact & light-weight construction. This lens incorporates SLD (Special Low Dispersion) glass elements that have a high refractive index, & corrects chromatic aberration at the telephoto-end very well. Moreover, aspherical lens elements, including double-sided aspherical lenses, ensure a compact size & excellent correction of distortion. This also helps to produce superior rendering performance throughout the entire zoom range from wide-angle to tele-photo & macro photography. Close-up photography One of the biggest features of this lens is that it is possible to shoot subjects as close as macro lenses. This lens features a minimum focusing distance of 39cm & a maximum magnification ratio of 1:3. It offers the versatility for shooting close-ups of fashion accessories, cuisine, flower arrangements & much more without changing the lens. Its working distance is 14.7cm, & it is suitable for shooing images with natural light as it keeps the shadows of camera & lens off of the image. Optical Stabilizer This lens incorporates an OS system which offers superior stabilization, making it possible to compensate for camera shake even in macro range photography where a small blur can be easily identified. Designed to minimize flare & ghosting Flare & ghosting were thoroughly measured & monitored from the lens development stage to establish an optical design which is resistant to strong incidental light such as backlight. The Super Multi-Layer Coating reduces flare & ghosting & provides sharp & high contrast images even in backlit conditions. Attaching the matched petal type hood, which is supplied, will provide extra protection from flare & ghosting. Incorporating Rounded Diaphragm The 7 blade-rounded diaphragm creates an attractive blur to the out-of-focus areas of the image. Hyper Sonic Motor HSM (Hyper Sonic Motor) delivers high AF speed & extremely quiet performance. With the latest AF algorithm, smoother AF is achieved. * For Pentax mount, if the camera body does not support HSM, auto focus will not be available Brass made bayonet mount This lens incorporates a brass made bayonet mount which has both high accuracy & durability. A special treatment to reinforce its strength is applied to the surface giving it greater strength & making it highly resistant to long-term use. ...