Sigma AF 4.5mm f/2.8 EX DC Circular Fisheye HSM
The Sigma AF 4.5mm f/2.8 EX DC Circular Fisheye HSM is a camera glass that creates a circular fisheye effect. It has autofocus and manual focus options. The lens elements are designed for APS-C cameras and provide a full-frame equivalent focal length of 6.75mm. The lens has a high aperture value of f/2.8, which allows for bright photos. It has 6 aperture blades that create a pleasing bokeh effect. The lens coating helps to reduce ghosting and flare. The build quality is good, and the lens is durable. The manufacturing time is not mentioned. The resolution is sharp, and the lens provides a unique perspective for photographers.
Alternatives to this lens include other fisheye lenses from different brands. The lens is best suited for photographers who want to create unique and creative images. It is not recommended for everyday photography or portraits.
Optical design
Full frame equivalent focal length is 6.75 mm. It is a ring-type ultrasonic motor designed to provide quick and silent focusing. Has 6 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle. Bright lens thanks to the high aperture value
Physical characteristics
78 mm long, requires consideration if you want to carry in the camera bag. Weights 470 grams so plan ahead, carry only if really necessary.
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