Technologies Explained
f/2.0, 28mm, 3.8x Wide-angle lens
The f/2.0 lens of the Canon PowerShot S90 allows twice as much light into the camera
as a regular f/2.8 lens. This makes it possible to take blur-free images in darker
conditions (1-stop darker) than with other cameras. A wider aperture also allows for an
ever shallower depth of field effect to be obtained.
The PowerShot S90 lens is a 3.8x zoom lens with a focal length range of 28 to 105 mm*
(*35mm file equivalent)
Lens Control Ring
A key new feature of the PowerShot S90 is the lens Control Ring at the base of the lens
barrel. This is an intuitive new control that provides ultimate ease of use and versatility.
Depending on the function chosen using the Ring Function Button, on the top of the
camera, the Control Ring can be rotated freely clockwise or anti-clockwise to change
settings such as ISO, Aperture, Shutter Speed, Step Zoom, White balance Correction,
Self-timer setting, Manual focus, Direct jump in playback and new Nostalgic Mode.
The combination of the lens Control Ring with the Multi Control Dial on the back of the
camera can also be customised to change settings. For example, focus can be adjusted
via the lens Control Ring whilst the Multi Control Dial can control exposure
compensation.
Dual Anti Noise System
The Dual Anti-Noise System represents a collaboration between the new High
Sensitivity sensor and the high performance DIGIC 4 image processor.
The area of each pixel within the new sensor is 45% larger than the sensor previously
used (from 14.7MP in previous comparable products). When this factor is combined
with the latest sensor technology the result is a marked improvement in signal/noise
ratio.
When used with the advanced DIGIC 4 Noise Reduction technology - which has been
optimised for the new sensor - the overall result is a maximum noise reduction
advantage of 2-stops.
Put simply, the user will benefit from a noise level that’s as low as a ¼ of the noise
produced from previous comparable products at the same ISO sensitivity. Alternatively
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