Product Description
The first Circular Fisheye Lens exclusively for use with
APS-C size digital SLR cameras.
Sigma 4.5mm is digitally optimised circular fisheye lens designed
exclusively for digital SLR cameras with an APS-C size image sensor.
The 4.5mm auto focus circular fisheye lens has an angle of view of 180 degrees
in all directions. The 4.5mm fisheye lens is exclusively designed for digital
SLR cameras with the APS-C size image sensor. When it is used in conjunction
with digital SLRs with APS-C size image sensors, it produces circular image
within the frame.
F/2.8 maximum aperture
The fast f/2.8 maximum aperture in Sigma 4.5mm fisheye lens produces a bright
image in the viewfinder making 4.5mm lens ideal for low light photography.
Close-up Photography with 4.5mm lens
This 4.5mm circular fisheye lens has a minimum focusing distance of 13.5cm and a
maximum magnification of 1:6 making it particularly useful for close-up
photography.
Excellent optical performance
SLD (Special Low Dispersion) glass provides effective compensation of chromatic
aberration and Sigmas Super Multi-Layer coating minimises flare and ghosting.
High speed auto focus
The 4.5mm lens is equipped with an inner focusing system that creates high
definition and excellent 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.
Ideal for panoramic and scientific applications
Sigma 4.5mm lens is ideal for photographers using computer stitching software
which requires circular fisheye images to be input, resulting in stitched
panoramas. Due to the quantifiable angle/area relationship it produces, this
lens can be used for scientific applications such as solid angle measurements of
cloud distribution over the sky, or vegetation distribution of the rain forest
canopy.
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