Last updated (05 August’10):
- Review by ShutterBug
The Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye features 4.5mm at focal length with maximum aperture of f/2.8. The lens construction has 13 Elements in 9 Groups and has diagonal angle of view at 180 degrees. Closest focusing distance at 13.5 cm/5.3 in and has a filter size of Insertion-type gelatin filter into rear of the lens. The Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye lens weighs 470g/16.6oz and it measures 3.0 inches in diameter and 3.1 inches long.
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Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye Reviews
ShutterBug reviews the Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye and writes;
“As you know, one of the determinants of depth of field is the focal length of the lens, and when you use either a 10mm or 4.5mm focal length (with a minimum close focusing distance of 5.3 inches in both lenses) at even f/8 you get sharpness from 3 feet to infinity with ease..”
Lenstip reviews the Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye and writes;
“With 4.5 mm focal length and f/2.8 when you set the sharpness at 0.4 meter you get the depth of field from 0.2 meter to infinity. On stopping down the lens to f/5.6 we don’t have to think about the sharpness at all. It’s enough to set it at 20 cm and we get a sharp picture from 10 cm to infinity..”
Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye User Reviews
Great Fisheye | Rating:
“This lens is a great fisheye lens. It has good image quality and focuses as well as can be expected. I have no complaints about the lens. “ – by Scott Traczyk
Great for equirectangular panoramas | Rating:
“Combined with Nodal Ninja rotating tripod heads, I’m using this lens to produce equirectangular 360deg x 180deg panoramas. Six shots in 60deg increments work perfectly when stitched with Hugin or AutoPano..” – by Steve Mokris
Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye Sample Photos
- Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye Sample Photos @ Mylensdb.com
- Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye Sample Photos @ Pbase.com
- Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye Sample Photos @ Flickr.com
Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye User Manual
- Download Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye User Manual (PDF – 2.5Mb)
Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye Specifications
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 F2.8 large aperture value produces a bright image in the viewfinder and allows photographers to take pictures in low light conditions, making it an ideal lens for Astrophotography and Aurora photography. Due to the quantifiable angle/area relationship it produces, this lens can be used for scientific and arts applications such as solid angle measurements of cloud distribution over the sky or vegetation distribution of the forest. The minimum focusing distance of 13.5cm/5.3inch 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. Sigma??s Super Multi-Layer Coating minimizes flare and ghosting. It is equipped with an inner focusing system that creates high definition and good 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.
See also: Lens Reviews | Sigma Lenses