Sigma 4.5mm F2.8 EX DC HSM Circular Fisheye
Launched November 2007


Digitally optimised circular fisheye lens designed exclusively for digital SLR cameras with an APS-C size image sensor

  • The first 180 degree circular fisheye lens designed specifically for APS-C size digital SLR cameras
  • Sigma’s multi-layer lens coating and lens design reduce flare and ghosting
  • Fast F2.8 maximum aperture making it ideal for low light photography
  • Minimum focusing distance of 13.5cm and a maximum magnification of 1:4.6
  • SLD glass minimizes color aberration
  • Equipped with HSM with full-time manual focus override

The Sigma Corporation is pleased to announce the launch of the new 4.5mm F2.8 EX DC HSM Circular Fisheye lens.

This auto focus circular fisheye lens has an angle of view of 180 degrees in all directions. It is exclusively designed for digital SLR cameras with the APS-C size image sensor. When used in conjunction with digital SLRs with APS-C size image sensors, it produces circular image within the frame.

The fast f/2.8 maximum aperture produces a bright image in the viewfinder making this lens ideal for low light photography.

The minimum focusing distance of 13.5cm and maximum magnification of 1:6 make it particularly useful for close-up photography. SLD(Special Low Dispersion)glass provides effective compensation of chromatic aberration and Sigma’s Super Multi-Layer coating minimises flare and ghosting. It is equipped with an inner focusing system that creates high definition and excellent image quality over the whole frame. The HSM(Hyper Sonic Motor)ensures fast and quiet autofocusing and allows full-time manual focus override by rotation of the focus ring.

This lens is ideal for photographers using computer stitching software which requires circular fisheye images to be input, resulting in stitched panoramas. Also supplied with the lens is a fitted padded case and a gelatin filter holder at the rear, allowing the use of gelatin filters.

Construction 13 Elements in 9 Groups
Focal Length 4.5mm
Maximum Aperture ƒ2.8
Minimum Aperture ƒ22
Field of View 180°
Minimum Focus Distance 13.5cm
Number of blades 6
Maximum Magnification 1:6
Zooming System N/A
Filter Size Rear Gelatin Type
Diameter 76mm
Length 77.8mm
Weight 470g
SRP at launch: £599.99
Available Mounts: Sigma AF, Canon AF, Nikon AF