Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye Lens for Nikon Digital SLR Cameras

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Price: $899.00    

Product Feature

• Fast F2.8 maximum aperture making it ideal for low light photography
• l Minimum focusing distance of 13.5cm and a maximum magnification of 1:6
• Equisolid angle projection method is possible for art and scientific use
• Equipped with HSM with full-time manual focus override

Product Description

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.

Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye Lens for Nikon Digital SLR Cameras Review

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.

Limited depth of field is a problem --- I find that typically I have to operate the lens at f/11 or f/16 to get decent full-frame-in-focus results, which necessitates shutter times of > 0.5s indoors, so it's only really useful for static scenes.

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