Sigma 4.5mm F2.8 EX DC Circular Fisheye HSM lens
|Sigma 4.5mm f/2.8 EX DC circular fisheye|
|Short back focus:||No|
|Unique features:||circular fisheye|
|Type:||circular fisheye lens|
|Frame coverage:||180 degrees|
|Construction:||9 groups / 13 elements|
|# Diaphragm blades:||6|
|Close focus distance:||13.5cm|
|Filter diameter:||rear (Gelatin filter)|
|Angle of view|
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. This lens is available in Canon, Nikon, Sigma, Pentax and Sony mounts.
- "Sigma 4.5mm F2.8 EX DC Circular Fisheye HSM". Retrieved 2009-08-21.
|This photography-related article is a stub. You can help Wikipedia by expanding it.|