The Sigma Corporation is pleased to announce the launch of the new 4.5mm F2.8
EX DC Circular Fisheye HSM lens. Features include:

· The first 180 degree circular fisheye lens designed specifically for
APS-C size digital SLR cameras

· Fast F2.8 maximum aperture making it ideal for low light photography


· Minimum focusing distance of 13.5cm and a maximum magnification of 1:6


· SLD glass minimizes color aberration

· Equipped with HSM with full-time manual focus override

· Equisolid angle projection method is possible for art and scientific
use



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 a 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.

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Sigma Corporation has announced their new 500 F4.5 APO EX DG HSM lens.
This ultra-telephoto lens has a fast maximum aperture, and also features a new super multi-layer coating, which optimizes the characteristics of digital SLR cameras.
Two ELD glass elements in the front lens elements reduce chromatic aberration to a minimum and also ensure sharp, quality images of high contrast. The overall length of the lens does not change during focusing, ensuring convenient handling and ease of use.
...

The Sigma Corporation of America this morning announced the Sigma 24-35mm F2 DG HSM Art lens, which the company is calling “the world’s first” full-frame zoom lens with a constant aperture of F/2 throughout the zoom range. The company has not yet announced pricing or availability for this somewhat unusual piece of premium glass.

Sigma just announced the new Sigma 35mm F1.2 DG DN Art and 14-24mm F2.8 DG DN Art lenses and the 45mm F2.8 DG DN Contemporary lens.