 | |
| Maker | Sigma Corporation |
|---|---|
| Technical data | |
| Focus drive | Ultrasonic motor |
| Focal length | 150mm |
| Aperture (max/min) | f/2.8 – f/22 |
| Close focus distance | 38 cm / 15.0 in. |
| Max. magnification | 1:1 |
| Diaphragm blades | 9 |
| Construction | 16 elements in 12 groups |
| Features | |
| Short back focus |  |
| Lens-based stabilization |  |
| Macro capable |  |
| Application | Macro / Telephoto |
| Physical | |
| Max. length | 137 mm / 5.4 in. |
| Diameter | 79.6 mm / 3.1 in. |
| Weight | 895 g / 31.6 oz. |
| Filter diameter | 72 mm |
| Accessories | |
| Lens hood | Barrel |
| Angle of view | |
| Diagonal | 16.4º |
| History | |
| Introduction | January 2006 |
| Retail info | |
| MSRP | $880.00 USD USD |
The Sigma 150mm f/2.8 APO Macro EX DG HSM is a telephoto macro prime lenses made by the Sigma Corporation.
In photography and cinematography, a telephoto lens is a specific type of a long-focus lens in which the physical length of the lens is shorter than the focal length. This is achieved by incorporating a special lens group known as a telephoto group that extends the light path to create a long-focus lens in a much shorter overall design. The angle of view and other effects of long-focus lenses are the same for telephoto lenses of the same specified focal length. Long-focal-length lenses are often informally referred to as telephoto lenses although this is technically incorrect: a telephoto lens specifically incorporates the telephoto group.
Macro photography, is extreme close-up photography, usually of very small subjects and living organisms like insects, in which the size of the subject in the photograph is greater than life size . By the original definition, a macro photograph is one in which the size of the subject on the negative or image sensor is life size or greater. However, in some uses it refers to a finished photograph of a subject at greater than life size.
In film and photography, a prime lens is a fixed focal length photographic lens, typically with a maximum aperture from f2.8 to f1.2. The term can also mean the primary lens in a combination lens system. Confusion between these two meanings can occur if context doesn't make the interpretation clear. People sometimes use alternate terms—primary focal length, fixed focal length, or FFL to avoid ambiguity.
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The lens is produced for the SA mount, Canon EF mount, Four Thirds System, and the Nikon F-mount varieties; all have the same optical formula.
The EF lens mount is the standard lens mount on the Canon EOS family of SLR film and digital cameras. EF stands for "Electro-Focus": automatic focusing on EF lenses is handled by a dedicated electric motor built into the lens. Mechanically, it is a bayonet-style mount, and all communication between camera and lens takes place through electrical contacts; there are no mechanical levers or plungers. The mount was first introduced in 1987.
The Nikon F-mount is a type of interchangeable lens mount developed by Nikon for its 35mm format single-lens reflex cameras. The F-mount was first introduced on the Nikon F camera in 1959, and features a three-lug bayonet mount with a 44 mm throat and a flange to focal plane distance of 46.5 mm. The company continues to use variations of the same lens mount specification for its film and digital SLR cameras.
When used on a digital crop body with a field of view compensation factor of 1.6x, such as the Canon EOS 450D, it provides a narrower field of view, equivalent to a 240mm lens mounted on a 35mm frame body. With a 1.5x body such as the Nikon D300 It provides a less narrow field of view, equivalent to a 225mm lens mounted on a 35mm frame body. With a 1.3x body such as the Canon EOS-1D Mark III It provides an even less narrow field of view, equivalent to a 195mm lens mounted on a 35mm frame body.
The field of view (FoV) is the extent of the observable world that is seen at any given moment. In the case of optical instruments or sensors it is a solid angle through which a detector is sensitive to electromagnetic radiation.
The EOS 450D is a 12.2-megapixel digital single-lens reflex camera that is part of the Canon EOS line of cameras. It is the successor to the EOS 400D/Digital Rebel XTi. It was announced on 23 January 2008 and released in March 2008 and April 2008 in North America. It was succeeded by the Canon EOS 500D which was announced on 25 March 2009.
The 35 mm format, or simply 35 mm, is the common name for the 36×24 mm film format or image sensor format used in photography. It has an aspect ratio of 3:2, and a diagonal measurement of approximately 43 mm. It has been employed in countless photographic applications including single-lens reflex (SLR) cameras, rangefinder cameras, mirrorless interchangeable-lens digital cameras, digital SLRs, point-and-shoot film cameras, and disposable film cameras.
