Product Description
I series｜Premium Compact Primes for mirrorless users
The SIGMA I series features full-frame compatible lenses that offer new
value to mirrorless systems. The combination of superb optical performance with
a level of compactness that is perfectly suited to smaller and lighter modern
mirrorless cameras will bring you new opportunities for a perfect shot.
SIGMA is aware that in today's world we have a wide range of camera choices,
especially with the increase in mobile phone ownership. But with many
photographers looking for something more than something that simply captures
images when they choose to own a camera and lens, I series lenses offer the
ultimate combination of superb optical performance, outstanding usability and
compact form-factor.
SIGMA's excellence in development and production technologies has been built up
since our founding in 1961 and became increasingly sophisticated with the
introduction of the SIGMA Global Vision brand in 2012. With this as a base,
SIGMA has given careful thought to the quality of the products, the feeling of
using it and the pleasure of owning it. This is how the I series was born.
New standards of optical performance for the Contemporary line
The 20mm F2 DG DN | Contemporary achieves the highest level of optical
performance even at the widest aperture setting of F2 from the center of the
image to the periphery. Based on the latest optical design technology, the lens
construction includes three high-precision glass-molded aspherical lens
elements, one SLD element, and one FLD element to suppress a range of optical
aberrations. The result is clear and sharp images even in the extreme corners of
the frame. By focusing on the suppression of sagittal coma flare, which is
difficult to correct in post-processing, accurate reproduction of very bright
points of light has been achieved. This also provides extremely detailed results
across the entire image, which is especially important for night sky
photography.
The lens' optical design, as well as its Super Multi-Layer Coating and Nano
Porous Coating (NPC), ensures very minimal flare and ghosting even when shooting
into bright light sources. This makes it much easier to photograph backlit
subjects and still achieve punchy, high contrast results.
Exceptional I series build quality with a compact form-factor
All I series lenses have an all-metal construction. The precision-cut
aluminum parts not only give the barrel a sleek, stylish finish, but provide
superb durability that improves the quality of the entire product. Metal
materials are also used in internal structures that slide with the operation
ring for added robustness. These high-precision components crafted with SIGMA's
cutting-edge metalworking technology are also used in SIGMA's Cine lens line-up
for professional cinematographers and provide a tactile, ergonomic feel that
make the lens a pleasure to use.
The cover ring between the focus ring and the aperture ring has hairline
processing that is also used for the rear cylinder of the Art line. This
covering functions as a finger hold when attaching or detaching the lens.
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