The pocket-sized 7.1 Megapixel PowerShot SD550 Digital ELPH and 5.0 Megapixel PowerShot SD450 Digital ELPH cameras, join Canon’s line-up between the SD500 and SD400 models which will continue to be available. The new PowerShot SD450 and 450 Digital ELPH cameras offer consumers a big 2.5-inch LCD screen, while retaining Canon’s famed functionality and optical viewfinder. Additionally, the new cameras feature a new UI display designed to capitalize on the larger screen size.

Specifications

 Max resolution   :   2592 x 1944
 Low resolution   :   2048 x 1536, 1600 x 1200, 640 x 480
 Image ratio w:h  :    4:3
 Effective pixels  :    5.0 million
 Sensor photo detectors   :   5.0 million
 Sensor size  :    1/2.5 "
 Sensor type  :    CCD
 Colour filter array  :    RGB
 Sensor manufacturer  :    Unknown
 ISO rating   :   Auto, 50, 100, 200, 400
 Zoom wide (W)  :    35 mm
 Zoom tele (T)  :    105 mm (3 x)
 Digital zoom   :   Yes, 4 x
 Image stabilization   :   No
 Auto Focus   :   Yes
 Manual Focus  :    No
 Auto focus type   :   AiAF TTL 9-point or center
 Normal focus range   :   Unknown
 Macro focus range   :   3 cm
 White balance override   :   6 positions plus manual
 Aperture range  :    F2.8 - F4.9
 Min shutter  :    15 sec
 Max shutter   :   1/1500 sec
 Built-in Flash   :   Yes
 Flash guide no.  :    3.5 m (11.4 ft) 5 m
 External flash   :   Yes, Canon High Power Flash (slave)
 Flash modes  :    Auto, On, Off, Manual (Red Eye On/Off)
 Exposure compensation  :    -2 EV to +2 EV in 1/3 EV steps
 Metering   :   Evaluative, Center Weighted, Spot
 Aperture priority  :    No
 Shutter priority  :    No
 Focal length multiplier       
 Lens thread   :   No
 Continuous Drive  :    Yes, 2.1 fps, unlimited
 Movie Clips   :   Yes, 640 x 480, 30/15 fps, 320 x 240, 60/30/15 fps, 160 x 120 15 fps 
 Remote control   :   No
 Tripod mount  :    Yes
 Self-timer  :    2 or 10 sec
 Timelapse recording  :    No
 Orientation sensor  :    Yes
 Storage types   :   SD/MMC card
 Storage included  :    16 MB SD card
 Uncompressed format   :   No
 Compressed format  :    JPEG (EXIF 2.2)
 Quality Levels :     Super-Fine, Fine, Normal
 Viewfinder  :    Optical
 LCD   :   2.5 "
 LCD Pixels  :    115,000
 Video out  :    Yes
 USB   :   Yes
 Firewire (IEEE 1394)  :    No
 Battery / Charger   :   Yes
 Battery  :    Lithium-Ion NB-4L battery & charger
 Weight (inc. batteries)    :  155 g (5.5 oz)
 Dimensions   :   86 x 54 x 22 mm (3.4 x 2.1 x 0.9 in)

Reviews

The SD450 is packed with a high resolution 5.0-megapixel CCD image sensor, a retractable 3x optical zoom lens with macro capabilities as close as four inches, shutter speeds from 15 to 1/2000th of second, a fast 9-point AiAF “Smart” autofocus system, a new and more powerful built-in flash, rechargeable battery and a large 2.5-inch color LCD monitor, all driven by the exclusive DIGIC II processor.
http://www.steves-digicams.com/