SIGMA 500mm f/4 DG OS HSM Sports Lens for F - Manual (Page 9)

[SIGMA GLOBAL VISION]
SIGMA Global Vision” - SIGMA is working on its full renewal of the products, and the new lens lines
share all the following elements.
Evaluation with SIGMA’s own MTF measuring system “A1*”
We used to measure lens performance with an MTF measuring system using
conventional sensors. However, we’ve now developed our own proprietary
MTF (modulation transfer function) measuring system (A1) using
46-megapixel Foveon direct image sensors. Even previously undetectable
high-frequency details are now within the scope of our quality control inspections. The SIGMA
500mm F4 DG OS HSM | Sports will all be checked using this “A1” before they are shipped.
*A1:Aizu 1
“Made in Japan” with the best craftsmanship
Applicable for the Mount Conversion Service that
enables lenses to be long term assets
Over the years, Sigma has manufactured an extremely wide variety of
interchangeable lenses. Leveraging our unique know-how and resources,
we present our new mount conversion service, which is available for the
interchangeable lenses from our new product lines. Sigma will convert the
current lens mount internal components, allowing you to continue using your favorite Sigma lens
with a different camera body. Thanks to this service, you can use a favorite lens for many years to
come, unrestricted by your original choice of camera system.
Note: Sigma’s mount conversion service differs from ordinary repairs and product support and is not offered at your
local
Sigma dealer or camera store. In order to apply for the service, please contact your nearest authorized subsidiary/
distributer of Sigma.