the lens produces will vary slightly between cameras. The well-constructed and precision designed lens features a built in lens hood and a sturdy locking lens cap to protect the large front element from damage when it's stored or not being used to make photographs. The optical construction consists of ten elements in seven groups and is computer optimized to produce clear, crisp photographs, which is critical with a lens like this that is capable of extreme depth-of-field. When set at f/22 the result is a great range in depth-of-field that makes focusing less critical.The field of view with the APS-sized sensor is a full 180° producing the kind of super wide-angle view found only in much more expensive lenses. With a close focusing distance of just 12 inches and i  (less)

Advanced automatic TTL Pre-Flash exposure control is offered through the dedicated hot shoe connector.  (less)

perspective. This manual focus lens, when used with cameras with an APS-C image sensor, creates images with an expanded perspective , including images with a creatively deformed outlook and a sharp pan focus that extends throughout the entire frame. By offering a 180-degree angle of view , this fisheye lens can be used to create amazing image expressions that cannot be seen by the human eye, such as exaggerated perspective and distortion. The minimum shooting distance (just 12 inches) and large depth of field also provide amazing close-up shots. In addition, this lens incorporates the latest optical multi-coating techniques. The process of multi-coating assures virtually flare-free photographs even under adverse lighting conditions, resulting in crisp, high-contrast pictures. Key Feature...  (less)

design allows maximum creative expression. This lens, when used with cameras with an APS-C image sensor, creates images with an expanded perspective, including images with a creatively deformed outlook and a sharp pan focus that extends throughout the entire frame. By offering a 180-degree angle of view, this fisheye lens can be used to create amazing image expressions that cannot be seen by the human eye, such as exaggerated perspective and distortion. The minimum shooting distance (just 12 inches) and large depth of field also provide amazing close-up shots. Opteka's super multi-layer lens coating reduces flare and ghosting, a common problem with digital cameras and also creates an optimum color balance. f/Stop Range: 3.5-22 Angle of View: 180° diag...  (less)

lens, when used with cameras with an APS-C image sensor, creates images with an expanded perspective, including images with a creatively deformed outlook and a sharp pan focus that extends throughout the entire frame. By offering a 180-degree angle of view, this fisheye lens can be used to create amazing image expressions that cannot be seen by the human eye, such as exaggerated perspective and distortion. The minimum shooting distance (just 12 inches) and large depth of field also provide amazing close-up shots. Opteka's super multi-layer lens coating reduces flare and ghosting, a common problem with digital cameras and also creates an optimum color balance. f/Stop Range: 3.5-22 Angle of View: 180° diag...  (less)

an inexpensive way to get up to speed on techniques that will help you create stunning photos. These cards are a great reference for avid photographers -- just clip them in your camera bag for quick help when you're out shooting. The Quik Cards or "cheatsheets" small enough to be easily stored in your camera bag or clipped just about anywhere. Cards included in these sets: Quik Cards I: Metering and Exposure, Changing Exposure Settings, Lighting, Fill Flash, Landscape, Water, Flowers, Sunrises and Sunsets, Nighttime Photography, Fireworks, Portraits, High / Low Key. Quik Cards II: 3 Steps to Better Photos, Black & White Filters, Red Eye, Action Stopping, Intentional Blur, Sports, Effective Flash Range, Design Elements, Multiple Exposure, Macro, Wildlife. Quik Cards III: Children, Weddings, Still Life, Underwater, Travel, Stock, Lenses, Filters, Bracketing, RAW vs JPEG, Edit Print and Preserve.  (less)