Sigma DC 4.5mm f/2.8 EX HSM Fisheye

The Sigma DC 4.5mm f/2.8 EX HSM Fisheye is a camera glass that captures wide and distorted images with a focal length equivalent to 6.75mm on full-frame cameras. It has an autofocus system that is quick and silent due to its ultrasonic motor. The lens has six aperture blades that create a circular bokeh effect. It is a bright lens with a high aperture value. The lens is 78mm long and weighs 470 grams. The lens has a sturdy build quality and is coated to reduce ghosting and flare. The lens is manufactured with high-quality materials and has excellent resolution.

Positives:
– The Sigma DC 4.5mm f/2.8 EX HSM Fisheye lens provides a unique and fun perspective to photographs, thanks to its fisheye design.
– The lens produces sharp and clear images, with excellent color reproduction and contrast.
– The lens build quality is sturdy and durable, with a metal mount and solid construction overall.
– The autofocus is fast and accurate, thanks to the lens’s HSM (Hyper Sonic Motor) technology.
– The lens is also quite versatile in terms of its wide-angle capabilities, making it suitable for landscape and architectural photography.

Negatives:
– The fisheye design can be a bit limiting in terms of its specific uses, and it may not be well-suited for every photography style.
– Some users may find the lens to be quite bulky and heavy, which can make it difficult to carry around for extended periods of time.
– The lens does not have image stabilization, which can be a disadvantage in low-light situations.

Conclusion:
Overall, the Sigma DC 4.5mm f/2.8 EX HSM Fisheye lens is an excellent choice for photographers looking to experiment with different perspectives and add some fun to their photos. The lens produces high-quality images with a unique and distinctive look, and its fast autofocus and sturdy construction make it a reliable and durable option for everyday use. While it may have some limitations in terms of its specific uses, the Sigma DC 4.5mm f/2.8 EX HSM Fisheye lens is a great addition to any photographer’s kit.

Optical design

It is a ring-type ultrasonic motor designed to provide quick and silent focusing. Bright lens thanks to the high aperture value Has 6 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle. Full frame equivalent focal length is 6.75 mm.

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.