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Sigma 4.5mm f/2.8 EX DC Circular Fisheye HSM lens

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Sigma 4.5mm f/2.8 EX DC circular fisheye
MakerSigma Corporation
Technical data
Typecircular fisheye lens
Focus driveUltrasonic motor
Focal length4.5mm
Crop factor180 degrees
Aperture (max/min)f/2.8
Close focus distance13.5cm
Max. magnification1:6
Diaphragm blades6
Construction13 elements in 9 groups
Features
Short back focusNo No
Lens-based stabilizationNo No
Macro capableNo No
Unique featurescircular fisheye
Physical
Max. length77.8mm
Diameter76.2mm
Weight470g (16.6oz)
Filter diameterrear (Gelatin filter)
Accessories
Lens hoodnone
Angle of view
Horizontal180
Vertical180
Diagonal180
Retail info
MSRP$1400 USD

The Sigma 4.5mm f/2.8 EX DC circular fisheye is a photographic lens manufactured by Sigma Corporation. It is a circular fisheye lens, designed to project a 180-degree field of view in all directions onto a circular image. It is the first such lens to provide the complete circular fisheye effect on crop factor digital SLR cameras, which do not have a full 36x24mm sensor.[1] This lens is available in Canon, Nikon, Sigma, Pentax and Sony mounts.

This lens projects a 13mm image circle, which fits nicely in a Micro Four Thirds system frame with an adapter.

See also

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References

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  1. ^ "Sigma 4.5mm F2.8 EX DC Circular Fisheye HSM". Retrieved 2009-08-21.