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

Sigma 4.5mm f/2.8 EX DC circular fisheye
Technical data
Maker	Sigma Corporation
Type	circular fisheye lens
Focus drive	Ultrasonic motor
Focal length	4.5mm
Crop factor	180 degrees
Aperture (max/min)	f/2.8
Close focus distance	13.5cm
Max. magnification	1:6
Diaphragm blades	6
Construction	13 elements / 9 groups
Features
Short back focus	No
Lens-based stabilization	No
Macro capable	No
Unique features	circular fisheye
Physical
Max. length	77.8mm
Diameter	76.2mm
Weight	470g (16.6oz)
Filter diameter	rear (Gelatin filter)
Accessories
Lens hood	none
Angle of view
Horizontal	180
Vertical	180
Diagonal	180
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 be provide the complete circular fisheye effect on crop factor digital SLR cameras that do not have a full 36x24mm sensor.^[1] This lens is available in Canon, Nikon, Sigma, Pentax and Sony mounts.

References

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

Sigma lenses

DC Lenses (Crop-sensor DSLRs only)	4.5mm f/2.8 EX DC Circular Fisheye HSM 8-16mm f/4.5-5.6 DC HSM 10mm f/2.8 EX DC Fisheye HSM 30mm f/1.4 EX DC HSM 10-20mm f/3.5 EX DC HSM 10-20mm f/4-5.6 EX DC HSM 17-50mm f/2.8 EX DC OS HSM 17-70 f/2.8-4 DC MACRO 18–35mm f/1.8 DC HSM A 18-50mm f/2.8 EX DC Macro 18-50mm f/2.8-4.5 DC OS HSM 18-50mm f/3.5-5.6 DC 18-125mm f/3.8-5.6 DC OS HSM 18-200mm f/3.5-6.3 DC 18-200mm f/3.5-6.3 DC OS 18-250mm f/3.5-6.3 DC OS HSM 18-250mm f/3.5-6.3 DC Macro OS HSM APO 50-150mm f/2.8 EX DC HSM 55-200mm f/4-5.6 DC

DN Lenses(Mirrorless interchangeable-lens cameras only)	19mm f/2.8 EX DN 30mm f/2.8 EX DN

Wide-Angle Zoom	12-24mm f/4.5-5.6 17-35mm f/2.8-4 EX DG ASPHERICAL HSM 24-35mm f/2 DG HSM Art

Standard Zoom	28-70mm f/2.8 EX DG 28-70mm f/2.8-4 DG 28-300mm DG 24-70mm f/2.8 EX DG HSM

Telephoto Zoom	50-500mm f/4-6.3 DG APO 70-200mm f/2.8 II EX DG MACRO HSM 70-200mm f/2.8 EX DG OS HSM 70-300mm f/4-5.6 APO DG Macro 100-300mm f/4 EX DG HSM 120-300mm f/2.8 EX DG HSM 120-300mm f/2.8 DG OS HSM S APO 120-400mm f/4.5-5.6 DG OS HSM APO 150-500mm f/5-6.3 DG OS HSM APO 150-600mm f/5-6.3 DG OS HSM C APO 150-600mm f/5-6.3 DG OS HSM S 200-500mm f/2.8 EX DG 300-800mm f/5.6 EX DG HSM

Wide-Angle Prime	14mm f/2.8 EX HSM RF ASPHERICAL 20mm f/1.4 DG HSM Art 20mm f/1.8 EX DG 24mm f/1.4 DG HSM Art 24mm f/1.8 EX DG 28mm f/1.8 EX DG 35mm f/1.4 DG HSM A

Standard Prime	50mm f/1.4 EX DG HSM 50mm f/1.4 DG HSM A 85mm f/1.4 EX DG HSM

Super Telephoto Prime	300mm f/2.8 EX DG HSM 500mm f/4.5 EX DG HSM 800mm f/5.6 EX DG HSM

Distorting lenses	8mm f/3.5 EX DG circular fisheye 8mm f/4 EX DG circular fisheye

Macro Prime	50mm f/2.8 EX DG 70mm f/2.8 EX DG 105mm f/2.8 EX DG 150mm f/2.8 APO Macro EX DG HSM 180mm f/3.5 EX DG

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

See also

References