Sigma 635205 Camera Lens User Manual


 
Convenient handling
The lens' wide zoom ring ensures convenient handling. Putting the zoom ring in front allows the lens barrel to be more
compact. The inner focusing system eliminates front lens rotation, enhancing the lens' stability and allowing use of
Circular Polarizing filters.
Designed to minimize flare and ghosting
Flare and ghosting were thoroughly measured and monitored from an early stage in the lenses development to
establish an optical design which is resistant to strong incidental light such as backlight. The Super Multi-Layer
Coating reduces flare and ghosting and provides sharp and high contrast images even in backlit conditions.
Minimum focusing distance of 45cm
With a minimum focusing distance of 45cm and a maximum magnification ratio of 1:4.6, this lens is excellent for
close-up photography.
Hyper Sonic Motor
The HSM (Hyper Sonic Motor) ensures a silent, high-speed AF function. Optimizing AF algorithm, smoother AF is
achieved. It also enables full-time manual focusing capability which allows sensible focus adjustment by simply
rotating the focus ring.
Incorporating Rounded diaphragm
The 9 blade rounded diaphragm creates an attractive round bokeh at large-aperture settings.
Design concept
The new product lines incorporate rubber for the attachment part of the provided lens hood. For better usability, the
designs of the lens cap and AF/MF changeover switch have been improved. In order to ensure high accuracy of the
product, all metallic parts and the new compound material, TSC (Thermally Stable Composite), which has a high
affinity to metal parts, are housed internally. On the zoom ring, the last three digits of its release year are engraved so
the lens can be identified according to the year of its launch.
Brass made bayonet mount
This lens incorporates a brass made bayonet mount which has both high accuracy and durability. A special treatment