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Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye 35mm Primes

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  • MPN486110
    Product ID49584521
    Weight16.58 oz
    Length3.06 in
    Lens TypeFixed Focal Length Lens
    Closest Focusing Distance5.3 in
    Diameter3 in
    Camera FormatDigital SLR
    Focus TypeAutofocus • Manual Focus
    Min Aperturef/22
    Picture Angle180 degrees
    Focal Length4.5mm
    Groups / Elements13 Elements in 9 Groups
    Diaphragm Blades6 Blades
    Lens Max Aperturef/2.8
    Macro LensWithout Macro Lens
    Designed for Digital CameraYes

Product Description

This autofocus 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. Now available for Sony/Minolta digital SLRs, and Pentax digital SLRs.

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