Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye

Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye

Lens Summary

Brand: Sigma

Also Known As: Sigma 4.5mm f/2.8 Fisheye

Lens Type: Prime Lens

Format: APS-C / DX

Focus: Autofocus

Lens Mount: Canon EF, Nikon F, Sigma SA

Release Date: 2008-01-01

MSRP Price: $799

Made in: Japan

Infrared Rating: Good

Production Status: In Production

Lens 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 f/2.8 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 Specifications

Lens Specifications
Lens TypePrime Lens
Focal Length4.5mm
Mount TypeCanon EF, Nikon F, Sigma SA
FormatAPS-C / DX
Compatible Format(s)Nikon DX, FX in DX Crop Mode,Canon (APS-C)
Compatible with TeleconvertersNo
Maximum Reproduction Ratio1:6
Optical Stabilization (Image Stabilization)No
Aperture Information
Aperture RingNo
Maximum Aperturef/2.8
Minimum Aperturef/22
Maximum Angle of View (APS-C or smaller format)180°
Optical Information
Lens Elements13
Lens Groups9
Diaphragm Blades6
Aspherical ElementsSLD glass
Nano CoatingNo
Super Multi-Layer CoatingNo
Focus Information
FocusAutofocus
Built-in Focus MotorYes
Hyper Sonic Motor (HSM)Yes
Internal FocusingYes
Minimum Focus Distance0.14m
Distance InformationYes
Physical Characteristics
Weather / Dust SealingNo
Mount MaterialMetal
Tripod CollarNo
Dimensions7.62 x 7.87cm
Weight470g
Other Information
Available in ColorsBlack

MTF Chart

Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye Chart

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