Specifications

VI. ACCESSORIES AND LENS 35

•

Compensation optics lens barrel suspended by 3 springs that hold it in place in the

enter, making it possible to eliminate the compensation optics retaining mechanism

n this IS unit

• Orientation of the compensation optics lens barrel along

the optical axis maintained using the force exerted by

angle-mounted springs and ceramic ball bearings (The

rotation of these ceramic ball bearings ensures that the

corrective optics are driven smoothly)

• Silicone resin damper fitted between the compensation

optics lens barrel and the supporting component (lens

group 2 lens barrel) damps harmful vibrations caused by

the extension and contraction of the springs and

improves IS performance

• Drive actuator for the compensation optics lens barrel constructed using the same

permanent magnets and coils used in existing IS units

• Construction of the new unit is based on the IS mechanism used in the PowerShot

SD700 IS Digital ELPH with design optimized for the characteristics of this lens

• Incorporating part of the lens group 2 lens barrel as a component of the IS unit makes

it possible to install the IS mechanism in a very limited space

•

Automatically distinguishes between normal shooting and panning shots and selects

the optimum Image Stabilizer mode, a first for Canon IS lenses—vibration gyro used to

detect the difference between normal camera shake and panning movement—MODE

1/Normal and MODE 2/panning eliminated

• A tripod can be used with IS left ON (but switching OFF will still reduce power con-

sumption)

• Minimum focusing distance of 0.25m at all zoom settings

• Maximum magnification is 0.34x (at 55mm)

• Uses round EMD diaphragm for very good background blur quality (bokeh) and round

points of light

ompensation optics

ovement

Compensation optics

Spring

Compensation optics

ens barrel

Ceramic ball

Damper

Structural Diagram of the IS

Unit Used in the

EF-S 18-55mm f/3.5-5.6 IS

(schematic)