The Sigma APO 180mm F3.5 EX DG lens was a
telephoto
A telephoto lens, in photography and cinematography, 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 ...
/
macro lens produced by
Sigma Corporation
is a Japanese company, manufacturing cameras, lenses, flashes and other photographic accessories. All Sigma products are produced in the company's own Aizu factory in Bandai, Fukushima, Japan. Although Sigma produces several camera models, ...
. It contained two
SLD (Special Low Dispersion) glass elements to provide correction for chromatic aberration and was aimed toward advanced
consumer
A consumer is a person or a group who intends to order, or uses purchased goods, products, or services primarily for personal, social, family, household and similar needs, who is not directly related to entrepreneurial or business activities. T ...
s.
It was designed for use on full frame
Digital SLR
A digital single-lens reflex camera (digital SLR or DSLR) is a digital camera that combines the optics and the mechanisms of a single-lens reflex camera with a digital imaging sensor.
The reflex design scheme is the primary difference between a ...
cameras, but can also be fitted to DSLRs with smaller APS-C size sensors, where it covers a similar field of view to a 270mm lens when fitted to Nikon, Pentax and Sony cameras with 1.5x crop factors or 288mm with Canon DSLRs. It appears to have been replaced by the 150mm F2.8 EX DG HSM Macro lens.
The 180mm macro lens has the EX (‘Excellence’) matte finish on the lens barrel and supplied cylindrical hood and comes with the same DG (‘digital’) coatings that minimize the effects of internal reflections off the surface of the sensor. It’s significantly larger than the 105mm lens and has some features that lens lacks.
The lens came with a 90 mm long cylindrical lens hood attached with a bayonet mount on the front of the barrel. It could be reversed over the barrel for storage or carrying. The lens cap could be fitted with the hood in either position.
Also supplied with the lens was a removable tripod collar with a screw nut that enables the camera body to be rotated between horizontal and vertical positions without requiring the lens to be detached from the tripod.
See also
*
References
{{Sigma lenses
180
__NOTOC__
Year 180 ( CLXXX) was a leap year starting on Friday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Rusticus and Condianus (or, less frequently, year 933 '' Ab ...
Macro lenses