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Sigma APO Macro 180 mm f/ 2.8 EX DG OS HSM Lens

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Sigma APO Macro 180 mm f/ 2.8 EX DG OS HSM lens

MTF-charts

Sigma APO Macro 180 mm f/ 2.8 EX DG OS HSM MTF Chart

Optical design

Sigma APO Macro 180 mm f/ 2.8 EX DG OS HSM optical design

Format: 35mm SLR

Type: Prime lens

Focusing: Auto Focus (AF)

Lens mounts: Canon EF, EF-S, Canon EF, EF-S, Sony A / Minolta A, Sony A / Minolta A, Nikon F (FX, DX), Nikon F (FX, DX), Sigma SA, Sigma SA

First year of production: 2012

Optical design: 19 elements in 14 groups

Features: Ultra-Sonic Motor, Macro lens, Optical stabilisation
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Specifications:

Focal lengthMax. apertureMin. apertureBladesMin. Focus (m.)Filter Ø (mm.)Weight (gr/oz)Length (mm/in)
180mmf/2.8f/2290.4786 204/8

Additional information:

The Sigma APO Macro 180 mm f/ 2.8 EX DG OS HSM

  • Diagonal angle of view 13.7 ° (SD1 - 9.0 °)
  • Max. magnification 1:1
  • Internal floating focusing (IF)
  • Diameter 95 mm
  • Compatibility with 1.4x and 2х EX DG APO teleconverters
  • Price $ 2,400

The Sigma APO Macro 180mm f2.8 EX DG OS HSM  is the fastest  180 mm macro lens  on today's market- the rest have a maximum aperture of f/3.5; besides, it is the only lens with a focal length like that which has an optical stabilizer.

The optical scheme of the lens consists of 19 elements in 14 groups, including three FLD elements ( glass with a low refractive index and low dispersion as compared to ordinary optical glass and with a performance equal to fluorite glass, used to correct aberrations) The super multi coating reduces flare and halation and provides sharp and high contrast images even at a maximum aperture.

Equipped with its own optical stabilizer (even for Sony) the lens offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible, enabling handheld close-up photography. The HSM (Hyper Sonic Motor) ensures quiet and high-speed autofocusing, as well as full time manual focusing (FTM). An additional Sigma teleconverter enables shooting with even greater working distance or with a magnification ratio larger than 1:1.

Short-distance photography may be problematic, especially while taking  life-size pictures of timid animals and insects without scaring them away or close-up photos of little objects without shadowing them. A larger focal length of the Sigma 180mm f/2.8 EX DG OS HSM eliminates many of these problems, allowing you to step back from the object of shooting.

A larger focal length not only reduces optical distortion, that may be problematic for close-up photography, but may also isolate the lens from unwanted details of back- and foreground, especially using one's own closest points of focus at maximum aperture.

Besides caps, the Sigma APO Macro 180mm F2.8 EX DG OS HSMis completed with:

  • LH927-01 hood
  • HA927-01 adapter for a crop 
  • TS-21 tripod socket

Vignetting (F2.8  F5.6  F11)

 

Distortion

 

Evaluation of Sigma designations:

  • AF for autofocus.
  • APO- an apochromatic lens, minimizing chromatic aberration. Lenses designated APO can be used with EX teleconverters.
  • HSM - a hyper sonic motor drive providing silent and fast focusing.
  • EX - a high-quality line of lenses, combining reliability, convenience and excellent optical characteristics.
  • IF - a mechanism of internal focusing does not affect the lens size while focusing and without the front element rotation.
  • DG - a full format lens optimized for DSRL cameras.
  • OS - optical stabilizer.
  • MACRO - macrography with the max. magnification ratio of 1:1.

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Posted by: dv   Date of publication: 10.01.2012


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