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"Samyang 50mm f/1.2 AS UMC CS Lens - Fuji X Mount"
"Product DescriptionSamyang 50mm F1.2 AS UMC CS Lens - FUJIFILM X MOUNT is a manual focus lens for Fujifilm X mount cameras with APS-C or smaller sized sensors. Equivalent to short telephoto lens, equivalent to 75mm on 1.5x crop APS-C sensor, making it a great lens for close cropped portraits, and other applications requiring a short, fast telephoto lens. Its relatively compact size and weight for such a fast aperture lens means it it is easily portable and unobtrusive, great for candid or low light street photography. The Samyang 50mm f1.2 is a fully manual lens, with bright f1.2 aperture, together with 9 circular bladed aperture offers beautiful bokeh, and separation of the background with shallow depth of field photography. The 50mm f1.2 lens features 9 elements in 7 groups including 2 glass aspherical lenses (ASP) and Ultra Multi Coating (UMC) offer high resolution and edge to edge sharpness throughout the image.Detachable petal-shaped lens hood. Filter size: 62mm"
Price: 284.99

"Samyang 50mm f/1.2 AS UMC CS Lens - M4/3"
"Samyang 50mm F1.2 AS UMC CS Lens - MFT is a manual focus lens for Micro Four Thirds mount mirrorless cameras such as Panasonic Lumix G / Olympus OM-D and PEN series / Blackmagic MFT camera systems. Equivalent to 100mm on 2x crop MFT sensors making it a great lens for close cropped portraits, and other applications requiring a short, fast telephoto lens. Its relatively compact size and weight for such a fast aperture lens means it it is easily portable and unobtrusive, great for candid or low light street photography. The Samyang 50mm f1.2 is a fully manual lens, with bright f1.2 aperture, together with 9 circular bladed aperture offers beautiful bokeh, and separation of the background with shallow depth of field photography. The 50mm f1.2 lens features 9 elements in 7 groups including 2 glass aspherical lenses (ASP) and Ultra Multi Coating (UMC) offer high resolution and edge to edge sharpness throughout the image.Detachable petal-shaped lens hood. Filter size: 62mm"
Price: 284.99

"Samyang 650-1300mm f/8.0-16.0 Telephoto Lens with T-mount Adapter for Canon Mount"
"The white 650-1300mm f/8.0-16.0 Zoom Lens from Samyang is a powerful ultra-telephoto zoom lens useful in any situation where a distant subject needs to be drawn close. Low dispersion, fully multi-coated lenses mean little glare and full light transmission for shaper images. An integrated lens hood also aids in keeping unwanted light out of your images. This manual focus lens can focus on subjects as close as 16.40' (5 m). And worth noting, when used on an APS-C format DSLR, the equivalent focal range increases to approximately 1000-2000mm (the exact equivalency depends on which camera body it is used with).Made from aluminum alloy with a rugged design, this lens can withstand the conditions you may encounter in the woods or at the stadium. A built-in, rotating tripod mount keeps the lens balanced and stable when used with a tripod or monopod. The lens is compatible with many brands of cameras, but needs a T-mount adapter (sold separately) specific to that brand. Also available separately is a dedicated 2x converter that can expand the focal range to an incredible 1300-2600mm."
Price: 263.99

"Samyang 650-1300mm f/8.0-16.0 Telephoto Lens with T-mount Adapter for Nikon Mount"
"The white 650-1300mm f/8.0-16.0 Zoom Lens from Samyang is a powerful ultra-telephoto zoom lens useful in any situation where a distant subject needs to be drawn close. Low dispersion, fully multi-coated lenses mean little glare and full light transmission for shaper images. An integrated lens hood also aids in keeping unwanted light out of your images. This manual focus lens can focus on subjects as close as 16.40' (5 m). And worth noting, when used on an APS-C format DSLR, the equivalent focal range increases to approximately 1000-2000mm (the exact equivalency depends on which camera body it is used with).Made from aluminum alloy with a rugged design, this lens can withstand the conditions you may encounter in the woods or at the stadium. A built-in, rotating tripod mount keeps the lens balanced and stable when used with a tripod or monopod. The lens is compatible with many brands of cameras, but needs a T-mount adapter (sold separately) specific to that brand. Also available separately is a dedicated 2x converter that can expand the focal range to an incredible 1300-2600mm."
Price: 236.99

"Samyang 650-1300mm f/8.0-16.0 Telephoto Lens with T-mount Adapter for Sony Mount"
"The white 650-1300mm f/8.0-16.0 Zoom Lens from Samyang is a powerful ultra-telephoto zoom lens useful in any situation where a distant subject needs to be drawn close. Low dispersion, fully multi-coated lenses mean little glare and full light transmission for shaper images. An integrated lens hood also aids in keeping unwanted light out of your images. This manual focus lens can focus on subjects as close as 16.40' (5 m). And worth noting, when used on an APS-C format DSLR, the equivalent focal range increases to approximately 1000-2000mm (the exact equivalency depends on which camera body it is used with).Made from aluminum alloy with a rugged design, this lens can withstand the conditions you may encounter in the woods or at the stadium. A built-in, rotating tripod mount keeps the lens balanced and stable when used with a tripod or monopod. The lens is compatible with many brands of cameras, but needs a T-mount adapter (sold separately) specific to that brand. Also available separately is a dedicated 2x converter that can expand the focal range to an incredible 1300-2600mm."
Price: 239.99

"Samyang 650-1300mm f/8.0-16.0 Telephoto Lens with T-mount Adapter for Pentax Mount"
"The white 650-1300mm f/8.0-16.0 Zoom Lens from Samyang is a powerful ultra-telephoto zoom lens useful in any situation where a distant subject needs to be drawn close. Low dispersion, fully multi-coated lenses mean little glare and full light transmission for shaper images. An integrated lens hood also aids in keeping unwanted light out of your images. This manual focus lens can focus on subjects as close as 16.40' (5 m). And worth noting, when used on an APS-C format DSLR, the equivalent focal range increases to approximately 1000-2000mm (the exact equivalency depends on which camera body it is used with).Made from aluminum alloy with a rugged design, this lens can withstand the conditions you may encounter in the woods or at the stadium. A built-in, rotating tripod mount keeps the lens balanced and stable when used with a tripod or monopod. The lens is compatible with many brands of cameras, but needs a T-mount adapter (sold separately) specific to that brand. Also available separately is a dedicated 2x converter that can expand the focal range to an incredible 1300-2600mm."
Price: 239.99

"Samyang 650-1300mm f/8.0-16.0 Telephoto Lens with T-mount Adapter for Olympus Mount"
"The white 650-1300mm f/8.0-16.0 Zoom Lens from Samyang is a powerful ultra-telephoto zoom lens useful in any situation where a distant subject needs to be drawn close. Low dispersion, fully multi-coated lenses mean little glare and full light transmission for shaper images. An integrated lens hood also aids in keeping unwanted light out of your images. This manual focus lens can focus on subjects as close as 16.40' (5 m). And worth noting, when used on an APS-C format DSLR, the equivalent focal range increases to approximately 1000-2000mm (the exact equivalency depends on which camera body it is used with).Made from aluminum alloy with a rugged design, this lens can withstand the conditions you may encounter in the woods or at the stadium. A built-in, rotating tripod mount keeps the lens balanced and stable when used with a tripod or monopod. The lens is compatible with many brands of cameras, but needs a T-mount adapter (sold separately) specific to that brand. Also available separately is a dedicated 2x converter that can expand the focal range to an incredible 1300-2600mm."
Price: 255.99

"Samyang 50mm f/1.2 AS UMC CS Lens for Canon EOS M Mount"
"A truly fast prime offering a portrait-length perspective, this black 50mm f/1.2 Lens from Samyung is designed for Canon EF-M mirrorless cameras where it provides an 80mm equivalent focal length. The combination of the long perspective and bright f/1.2 maximum aperture enables extensive control over focus placement, which is further complemented by the manual focus design and rounded nine-blade diaphragm for a smooth bokeh quality. The lens construction incorporates a pair of aspherical elements to minimize chromatic aberrations and distortions for a cleaner, sharper image quality void of color fringing. An Ultra Multi-Coating has also been applied to boost contrast by suppressing lens flare and ghosting.This 50mm f/1.2 lens is designed for APS-C-format Canon EF-M mount mirrorless cameras and provides an 80mm equivalent focal length.Bright, fast f/1.2 maximum aperture benefits working in difficult lighting conditions and also avails extensive control over shallow depth of field.Two aspherical elements help to control chromatic and comatic aberrations in order to achieve greater sharpness and clarity.An Ultra Multi-Coating has been applied to all lens elements in order to suppress lens flare and ghosting for increased contrast and color accuracy.This manual focus lens has a non-rotating 62mm front filter mount to better enable the use of polarizing, graduated ND, and other filter types that require precise positioning.Rounded nine-blade diaphragm contributes to a pleasing out-of-focus quality when using selective focus or shallow depth of field techniques."
Price: 284.99

"Sigma 10-20mm f/3.5 EX DC HSM Lens for Canon Mount"
"The Sigma 10-20mm f/3.5 EX DC HSM Autofocus Zoom is a super-wide angle lens with a maximum aperture of f/3.5 throughout the entire zoom range, ensuring high image quality. The maximum aperture of f/3.5 allows enough light in to make it a great choice for indoor shooting as well as landscapes and creative portraiture.With its wide angle view from 102.4 degrees, this lens can empower the photographer to produce creative images with exaggerated perspective. This lens has a Super Multi-Layer coating that coating reduces flare and ghosting. With a HSM (Hyper-Sonic Motor), the lens operates quietly and at high speed in both autofocus and full-time manual modes.The lens design incorporates an inner focusing system which eliminates front lens rotation, making the lens particularly suitable for using the Petal-type hood, reducing extraneous light and reducing internal reflection.Two ELD (Extraordinary Low Dispersion) glass elements and a SLD (Special Low Dispersion) glass element provide excellent correction of color aberration. Four aspherical lenses provide correction for distortion and allow compact and lightweight construction. This Sigma lens has a minimum focusing distance of 9.4 inches (24cm) throughout the entire zoom range and a maximum magnification ratio of 1:6.6."
Price: 286.99

"Sigma 10-20mm f/3.5 EX DC HSM Lens for Nikon Mount"
"The Sigma 10-20mm f/3.5 EX DC HSM Autofocus Zoom is a super-wide angle lens with a maximum aperture of f/3.5 throughout the entire zoom range, ensuring high image quality. The maximum aperture of f/3.5 allows enough light in to make it a great choice for indoor shooting as well as landscapes and creative portraiture.With its wide angle view from 102.4 degrees, this lens can empower the photographer to produce creative images with exaggerated perspective. This lens has a Super Multi-Layer coating that coating reduces flare and ghosting. With a HSM (Hyper-Sonic Motor), the lens operates quietly and at high speed in both autofocus and full-time manual modes.The lens design incorporates an inner focusing system which eliminates front lens rotation, making the lens particularly suitable for using the Petal-type hood, reducing extraneous light and reducing internal reflection.Two ELD (Extraordinary Low Dispersion) glass elements and a SLD (Special Low Dispersion) glass element provide excellent correction of color aberration. Four aspherical lenses provide correction for distortion and allow compact and lightweight construction. This Sigma lens has a minimum focusing distance of 9.4 inches (24cm) throughout the entire zoom range and a maximum magnification ratio of 1:6.6."
Price: 329.99

"Sigma 17-50mm f/2.8 EX DC OS HSM Lens For Canon Mount"
"The Sigma 17-50mm f/2.8 EX DC OS HSM Zoom Lens is an incredibly versatile, lightweight, and compact lens designed specifically for digital SLR cameras with APS-C size sensors. The lens has a fast f/2.8 maximum aperture throughout the entire zoom range. It features a construction of 17 elements in 13 groups with glass that corrects for flare, ghosting and all types of aberrations. It produces high contrast and sharp images throughout the zoom range even at its maximum aperture.Sigma's OS (Optical Stabilization) feature allows you to shoot at shutter speeds approximately 4 stops slower than would otherwise be possible. This means your images will look sharper, even when shooting without a tripod in low existing light or at maximum range with a flash. This lens is also equipped with Sigma's Hyper-Sonic Motor (HSM) which provides for fast and quiet autofocusing.The Sigma 17-50mm f/2.8 is ideal for many photo opportunities particularly landscapes and portraits, but with its wide focal range and a close focusing distance down to 11"" (28cm) you can capture images with unique perspectives. It will quickly become one of the most important lenses in your gear bag.Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras."
Price: 193.99

"Sigma 17-50mm f/2.8 EX DC OS HSM Lens For Nikon Mount"
"The Sigma 17-50mm f/2.8 EX DC OS HSM Zoom Lens is an incredibly versatile, lightweight, and compact lens designed specifically for digital SLR cameras with APS-C size sensors. The lens has a fast f/2.8 maximum aperture throughout the entire zoom range. It features a construction of 17 elements in 13 groups with glass that corrects for flare, ghosting and all types of aberrations. It produces high contrast and sharp images throughout the zoom range even at its maximum aperture.Sigma's OS (Optical Stabilization) feature allows you to shoot at shutter speeds approximately 4 stops slower than would otherwise be possible. This means your images will look sharper, even when shooting without a tripod in low existing light or at maximum range with a flash. This lens is also equipped with Sigma's Hyper-Sonic Motor (HSM) which provides for fast and quiet autofocusing.The Sigma 17-50mm f/2.8 is ideal for many photo opportunities particularly landscapes and portraits, but with its wide focal range and a close focusing distance down to 11"" (28cm) you can capture images with unique perspectives. It will quickly become one of the most important lenses in your gear bag. Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras."
Price: 192.99

"Sigma 4.5mm f/2.8 EX DC Circular Fisheye HSM Lens For Canon Mount"
"The Sigma 4.5mm f/2.8 EX DC HSM Lens is a spherical fisheye lens that easily captures a full 180° view in all directions, in a circular image. Even the most familiar and mundane of subjects can be portrayed with startlingly fresh new expressions through exaggerated perspectives and unusual distortion effects. It is well suited for academic and technical measurements such as solid angle measurements, cloud cover measurements & virtual reality. Having the HSM (Hyper Sonic Motor) incorporated into this lens allows for focusing to be quieter and more responsive. This lens provides the equivalent focal range of approx. 7.2mm 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. Not suitable for 35mm film SLR cameras or for any digital SLR camera with image sensor bigger than APS-C size, e.g. 5D, 1Ds, 1Ds Mark II or Kodak Pro SLR/c."
Price: 502.99

"Sigma APO 70-200mm f/2.8 EX DG OS HSM Lens For Nikon Mount"
"The Sigma 70-200mm f/2.8 EX DG APO OS HSM for Nikon is the second generation of large-aperture telephoto zoom lenses incorporating Sigma's OS (Optical Stabilizer) anti-shake system. It offers the equivalent of shooting at shutter speeds 3 to 4 stops slower than without OS, thus allowing handheld telephoto zoom shooting even in poorly lit conditions. Its HSM ensures quiet and high speed AF as well as full-time manual focusing.It features a large maximum aperture of f/2.8 that remains constant throughout the zoom range, making it incredibly valuable when shooting in low light situations such as wedding or other events. It is also great when shooting fast-moving subjects such as sports, when fast shutter speeds are needed to capture fleeting moments. The 70-200mm f/2.8 is fast and versatile and at a length of 7.8 (19.8cm) will be a tool that seldom sees the inside of your camera bag. The lens comes with a petal-type lens hood plus an adapter to extend its length for users with APS-c cameras. Two FLD (""F"" Low Dispersion) glass elements, which have the performance equal to expensive fluorite glass, and three SLD (Special Low Dispersion) glass elements, combine to provide excellent reduction of aberrations and image quality. The rounded 9 blade diaphragm creates an attractive blur to the out of focus images (bokeh). Sigma has managed to make the lens more compact than its predecessor, measuring only 7.8"" (8.64cm) in length. The Super Multi-Layer lens coating reduces flare ghosting and assures high image quality throughout the entire zoom range. The exterior of this lens is EX-finished to denote the superior build and optical quality, and to enhance its appearance. The lens DG designation translates to 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 while retaining suitability for traditional 35mm SLRs."
Price: 626.99

"Sigma 8-16mm f/4.5-5.6 DC HSM Lens For Canon Mount"
"The Sigma 8-16mm F4.5-5.6 DC HSM is an ultra-wide zoom that has a 35mm equivalent angle of view of a 12-24mm lens when used on DSLRs with APS-C size image sensors. Sigma's FLD glass elements, equal to fluorite glass, correct for distortions and color aberrations to deliver beautiful high contrast images.The lens has a minimum focusing distance of 9.4"" (24cm) allowing you to get in close to a subject to create exaggerated perspectives. This super wide angle zoom is perfect for shooting landscape photography, architecture, building interiors, photojournalism, wedding photography, group pictures and a wide variety of other shooting opportunities you may encounter. Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras."
Price: 379.99

"Sigma 8-16mm f/4.5-5.6 DC HSM Lens For Nikon Mount"
"The Sigma 8-16mm F4.5-5.6 DC HSM is an ultra-wide zoom that has a 35mm equivalent angle of view of a 12-24mm lens when used on DSLRs with APS-C size image sensors. Sigma's FLD glass elements, equal to fluorite glass, correct for distortions and color aberrations to deliver beautiful high contrast images.The lens has a minimum focusing distance of 9.4"" (24cm) allowing you to get in close to a subject to create exaggerated perspectives. This super wide angle zoom is perfect for shooting landscape photography, architecture, building interiors, photojournalism, wedding photography, group pictures and a wide variety of other shooting opportunities you may encounter. Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras."
Price: 369.99

"Sigma 8mm f/3.5 EX DG Circular Fisheye Lens For Canon Mount"
"The Sigma 8mm f/3.5 EX DG is a spherical fisheye lens that easily captures a full 180° view in all directions, in a circular image. Even the most familiar and mundane of subjects can be portrayed with startlingly fresh new expressions through exaggerated perspectives and unusual distortion effects. Well suited for academic and technical measurements such as solid angle measurements, cloud cover measurements & virtual reality.This improved version offers a brighter f/3.5 aperture, with a vastly improved minimum focusing distance of 5.3"" (13.5 cm) and a maximum magnification of 1:4.6. This circular fisheye lens can be used to create circular images with an angle of view of 180°. It permits creative expression through the exaggerated perspectives and unusual distortion effects.The improved DG lens design corrects for various aberrations. This lens is specially coated to get the best color balance whilst cutting down on ghosting caused by reflections from the digital image sensor. The lens provides the utmost correction against lateral chromatic aberration which is a serious problem for digital SLR cameras. This extreme fisheye lens is unique as it incorporates an auto focus system to get accurate focusing that might be difficult through finder due to extremely large depth of field. This lens is useful for academic/technical applications such as solid angle measurements, because it provides a quantifiable angle/area relationship. It is widely used in science and industry for cloud cover measurements, weather observation, astronomical studies, agriculture etc. The lens is supplied with an insertion-type gelatin filter holder at the rear allowing the use gelatin filter."
Price: 427.99

"Sigma 8mm f/3.5 EX DG Circular Fisheye Lens For Nikon Mount"
"The Sigma 8mm f/3.5 EX DG is a spherical fisheye lens that easily captures a full 180° view in all directions, in a circular image. Even the most familiar and mundane of subjects can be portrayed with startlingly fresh new expressions through exaggerated perspectives and unusual distortion effects. Well suited for academic and technical measurements such as solid angle measurements, cloud cover measurements & virtual reality.This improved version offers a brighter f/3.5 aperture, with a vastly improved minimum focusing distance of 5.3"" (13.5 cm) and a maximum magnification of 1:4.6. This circular fisheye lens can be used to create circular images with an angle of view of 180°. It permits creative expression through the exaggerated perspectives and unusual distortion effects.The improved DG lens design corrects for various aberrations. This lens is specially coated to get the best color balance whilst cutting down on ghosting caused by reflections from the digital image sensor. The lens provides the utmost correction against lateral chromatic aberration which is a serious problem for digital SLR cameras. This extreme fisheye lens is unique as it incorporates an auto focus system to get accurate focusing that might be difficult through finder due to extremely large depth of field. This lens is useful for academic/technical applications such as solid angle measurements, because it provides a quantifiable angle/area relationship. It is widely used in science and industry for cloud cover measurements, weather observation, astronomical studies, agriculture etc. The lens is supplied with an insertion-type gelatin filter holder at the rear allowing the use gelatin filter."
Price: 459.99

"Sigma AF 1.4X EX DG Teleconverter Lens For Canon Mount"
"The Sigma 1.4x DG EX APO Tele Converter (also known as a tele-extender) will multiply the focal length of the existing lens by 1.4x, and will cut back the amount of light by one f/stop. For example, using a 1.4x teleconverter with a 300 mm lens will effectively increase the focal length to 420mm. A lens set to f/2.8 will now be f/4.This APO teleconverter can be mounted between select lenses and the camera body to increase the focal length by the power of 1.4 or 2. The new multi layer coating reduces flare and ghost, which is a common problem with digital cameras. They demonstrate best performance with DG series lenses. They also offer maximum photography magnification by 1.4 x or 2x, without any variation in the minimum focusing distance. Compact and lightweight, these teleconverters convert your lenses into longer focal-length lenses, so you don't have to do a lot of unnecessary footwork"
Price: 161.99

"Sigma AF 1.4X EX DG Teleconverter Lens For Nikon Mount"
"The Sigma 1.4x DG EX APO Tele Converter (also known as a tele-extender) will multiply the focal length of the existing lens by 1.4x, and will cut back the amount of light by one f/stop. For example, using a 1.4x teleconverter with a 300 mm lens will effectively increase the focal length to 420mm. A lens set to f/2.8 will now be f/4.This APO teleconverter can be mounted between select lenses and the camera body to increase the focal length by the power of 1.4 or 2. The new multi layer coating reduces flare and ghost, which is a common problem with digital cameras. They demonstrate best performance with DG series lenses. They also offer maximum photography magnification by 1.4 x or 2x, without any variation in the minimum focusing distance. Compact and lightweight, these teleconverters convert your lenses into longer focal-length lenses, so you don't have to do a lot of unnecessary footwork"
Price: 164.99

"Sigma AF 15mm f/2.8 EX DG Fisheye Lens For Canon Mount"
"The Sigma 15mm f/2.8 EX DG Diagonal Fisheye is a full-frame fisheye auto focus lens that fills the entire 35mm negative with a full 180 degree diagonal field of view. This unique autofocus lens enables you to create a variety of unusual compositions even when shooting ordinary subjects. The improved DG lens coating reduces flare and ghosting, which is a common problem of digital cameras, and also creates an optimum color balance.Since most Digital SLR cameras use a smaller image sensor size (APS-C) than 35mm film cameras, 180 degree angle-of-view can not be obtained with Digital SLR cameras. With those cameras only the center part of the frame is used, therefore, peripheral distortion will be very small. The super wide angle of this lens makes it ideal for use with digital SLR cameras, providing a focal view of approximately 23mm."
Price: 359.99

"Sigma AF 15mm f/2.8 EX DG Fisheye Lens For Nikon Mount"
"The Sigma 15mm f/2.8 EX DG Diagonal Fisheye is a full-frame fisheye auto focus lens that fills the entire 35mm negative with a full 180° diagonal field of view. This unique lens enables you to create a variety of unusual compositions even when shooting ordinary subjects. The improved DG lens coating reduces flare and ghosting, which is a common problem of digital cameras, and also creates an optimum color balance. Since most Digital SLR cameras use a smaller image sensor size (APS-C) than 35mm film cameras, 180° angle-of-view cannot be obtained with APS-C digital SLR cameras. With those cameras only the center part of the frame is used, therefore, peripheral distortion will be very small. The super wide angle of this lens makes it ideal for use with digital SLR cameras, providing a focal view of approximately 23mm. Autofocus on this lens is not supported on Nikon D40 or D60 cameras. Accepts removable gelatin filters in a holder near the rear of the lens"
Price: 356.99

"Sigma AF 2X EX DG APO Teleconverter Lens For Canon Mount"
"The Sigma 2x EX APO Tele Converter (also known as a tele-extender) will multiply the focal length of the existing lens by 2x, and will cut back the amount of light by 2 f/stops. For example, using a 2x teleconverter with a 300 mm lens will effectively increase the focal length to 600 mm. A lens set to f/2.8 will now be f/5.6. The DG denotes added coating that achieves the best color balance whilst cutting down on ghosting caused by reflections from the digital image sensor.Sigma APO Tele Converter 1.4x and 2x are dedicated teleconverter lenses. Due to the high optical quality of this teleconverter, this item will only fit and work with a select list of lenses. Please click here for a compatibility chart of all compatible lenses."
Price: 199.99

"Sigma AF 2X EX DG APO Teleconverter Lens For Nikon Mount"
"The Sigma 2x EX APO Tele Converter (also known as a tele-extender) will multiply the focal length of the existing lens by 2x, and will cut back the amount of light by 2 f/stops. For example, using a 2x teleconverter with a 300 mm lens will effectively increase the focal length to 600 mm. A lens set to f/2.8 will now be f/5.6. The DG denotes added coating that achieves the best color balance whilst cutting down on ghosting caused by reflections from the digital image sensor.Sigma APO Tele Converter 1.4x and 2x are dedicated teleconverter lenses. Due to the high optical quality of this teleconverter, this item will only fit and work with a select list of lenses. Please click here for a compatibility chart of all compatible lenses."
Price: 191.99

"Sigma APO 50-500mm f/4.5-6.3 DG OS HSM Lens For Canon Mount"
"This 50-500mm f/4.5-6.3 APO DG OS HSM Lens for Canon EOS from Sigma is a zoom lens for digital SLR cameras with a Canon EF or EF-S lens mount. The lens has a standard to ultra telephoto zoom range that is ideal for nature, wildlife, or sports photography. The range translates into an equivalent 75-750mm when used with digital SLR cameras with an APS size chip. The lens is also compatible with full frame cameras. You can even increase your telephoto range by using the Sigma APO teleconverters.The OS (Optical Stabilizer) system minimizes image blur caused by camera shake, and offers the equivalent of shooting at a shutter speed 3-4 stops faster. This allows handheld telephoto zoom shooting even in poorly lit conditions.The use of the OS (Optical Stabilizer) system, HSM (Hyper Sonic Motor), APO apochromatic design, four elements of SLD (Special Low Dispersion) glass, and multicoated optics all enable this lens to provide a high level of performance throughout its entire zoom range. A rear focus system insures quick, convenient manual focus and a non-rotating front barrel.The improved DG lens design corrects for various aberrations. This lens is specially coated to get the best color balance, while cutting down on ghosting caused by reflections from the digital image sensor. The lens provides the utmost correction against lateral chromatic aberration, which is a serious problem for digital SLR cameras."
Price: 679.99

"Sigma APO 50-500mm f/4.5-6.3 DG OS HSM Lens For Nikon Mount"
"This 50-500mm f/4.5-6.3 APO DG OS HSM Lens for Nikon from Sigma is a zoom lens for digital SLR cameras with a Nikon lens mount. The lens has a standard to ultra telephoto zoom range that is ideal for nature, wildlife, or sports photography. The range translates into an equivalent 75-750mm when used with digital SLR cameras with an APS size chip. The lens is also compatible with full frame cameras. You can even increase you telephoto range by using the Sigma APO teleconverters.The OS (Optical Stabilizer) system minimizes image blur caused by camera shake, and offers the equivalent of shooting at a shutter speed 3-4 stops faster. This allows handheld telephoto zoom shooting even in poorly lit conditions.The use of the OS (Optical Stabilizer) system, HSM (Hyper Sonic Motor), APO apochromatic design, four elements of SLD (Special Low Dispersion) glass, and multicoated optics all enable this lens to provide a high level of performance throughout its entire zoom range. A rear focus system ensures quick, convenient manual focus and a non-rotating front barrel.The improved DG lens design corrects for various aberrations. This lens is specially coated to get the best color balance, while cutting down on ghosting caused by reflections from the digital image sensor. The lens provides the utmost correction against lateral chromatic aberration, which is a serious problem for digital SLR cameras."
Price: 648.99

"Sigma APO 70-300mm f/4-5.6 DG Macro Lens For Nikon Mount"
"Sigma's 70-300mm f/4-5.6 APO DG Macro Lens is one of several tele zoom lenses. By incorporating the autofocusing motor into the lens itself, it can now autofocus with all Nikon DSLR cameras (including the D40, D40x, etc.). In addition, with the motor built into the lens, focusing will be quieter and more responsive.This lens is a compact Apochromatic tele zoom lens incorporating two Special Low Dispersion glass elements in the front lens group, plus one Special Low Dispersion glass element in the rear lens group, to minimize chromatic aberration. The DG lens design corrects for various aberrations. This lens is specially coated to get the best color balance while also cutting down on ghosting caused by reflections from the digital image sensor.Macro photography with a 1:4 maximum close-up magnification at focal lengths from 70mm to 200mm and 1:2 maximum close-up magnification at the 300mm focal length. Switch for changeover to macro photography at focal lengths between 200mm and 300mm with a maximum close-up magnification from 1:2.9 to 1:2. The built-in autofocusing motor ensures quiet and high-speed auto focusing with full time manual focus override. The lens materials used in this product are lead and arsenic free ecological glass"
Price: 149.99

"Sigma 4.5mm f/2.8 EX DC Circular Fisheye HSM Lens For Nikon Mount"
"The Sigma 4.5mm f/2.8 EX DC HSM Lens is a spherical fisheye lens that easily captures a full 180° view in all directions, in a circular image. Even the most familiar and mundane of subjects can be portrayed with startlingly fresh new expressions through exaggerated perspectives and unusual distortion effects. It is well suited for academic and technical measurements such as solid angle measurements, cloud cover measurements & virtual reality. Having the HSM (Hyper Sonic Motor) incorporated into this lens allows for focusing to be quieter and more responsive. In addition, the HSM feature gives this lens the capability to auto focus with all Nikon DSLR cameras (including the D40 and D40x). This lens provides the equivalent focal range of approx. 6.75mm when used with a Nikon 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. Not compatible with 35mm cameras or digital cameras using full-size image sensors (e.g. D3, Kodak DCS14n or DCS PRO SLR/n)."
Price: 529.99

"Sigma AF 105mm f/2.8 DG OS Macro Lens For Nikon Mount"
"The Sigma 105mm f/2.8 EX DG OS Macro Lens for Nikon AF Cameras delivers superb, distortion-free images throughout its broad focus range, from infinity telephoto to life-size (1:1) macro, as close as 12.2"" (31 cm) without accessories. A Special Low Dispersion (SLD) lens and one high refractive index SLD lens provide excellent correction for all types of aberration and distortion. Its non-rotating front lens group makes it easier to work with polarizing filters. A focus limiter helps divide the broad focus range into more manageable chunks. The ""focus-free"" mechanical design allows the lens to autofocus without any interference from the manual focus ring, making it easy to hold the lens without affecting the speed or normal operation of the autofocus function. Rugged mechanical construction also makes it durable enough for even the heaviest use required by professional photographers. An ideal lens for a wide variety of applications from nature photography to portraiture. The improved DG lens design for this lens corrects for various aberrations. This macro lens is specially coated to get the best color balance while cutting down on ghosting caused by reflections from the digital image sensor. The lens provides the utmost correction against lateral chromatic aberration which is a serious problem for digital SLR cameras. Sigma's own proprietary OS (Optical Stabilizer) system enables handheld close-up photography."
Price: 309.99

"Sigma AF 105mm f/2.8 DG OS Macro Lens For Canon Mount"
"The Sigma 105mm f/2.8 EX DG HSM Macro Lens for Canon EOS Cameras delivers superb, distortion-free images throughout its broad focus range, from infinity telephoto to life-size (1:1) macro, as close as 12.2"" (31 cm) without accessories. A Special Low Dispersion (SLD) lens and one high refractive index SLD lens provide excellent correction for all types of aberration and distortion. Its non-rotating front lens group makes it easier to work with polarizing filters. A focus limiter helps divide the broad focus range into more manageable chunks.The ""focus-free"" mechanical design allows the lens to autofocus without any interference from the manual focus ring, making it easy to hold the lens without affecting the speed or normal operation of the autofocus function. Rugged mechanical construction also makes it durable enough for even the heaviest use required by professional photographers. An ideal lens for a wide variety of applications from nature photography to portraiture.The improved DG lens design for this lens corrects for various aberrations. This macro lens is specially coated to get the best color balance while cutting down on ghosting caused by reflections from the digital image sensor. The lens provides the utmost correction against lateral chromatic aberration which is a serious problem for digital SLR cameras. Sigma's own proprietary OS (Optical Stabilizer) system enables handheld close-up photography."
Price: 338.99