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Operation and controls

One of the joys of reviewing a Canon compact is that there is almost absolute consistency in controls and menus across its ranges, with each generation an evolution, not a re-invention of the wheel. And this is not without good reason; the combination of plentiful external controls and the 'FUNC' menu, which offers single-screen access to virtually every other aspect of the camera's operation, makes mastering a PowerShot simple and using it remarkably fluid. Of course this is a fairly simple camera - a true 'point and shoot' model, with very limited manual control. What you do get is most of the important stuff; control over metering, flash, ISO, white balance, file size/quality and so on. What you don't get - aside from a handful of subject modes - is any meaningful control over apertures and shutter speeds.

Rear of camera

The rear of the SD450 is dominated by the new, larger 2.5-inch screen, with all the main controls arranged around the ubiquitous four-way controller on the right of the body. Although you need to use the 'one stop shop' FUNC menu to change stuff like white balance, file size/quality etc, external controls are supplied for metering, flash, macro, continuous (burst) and self-timer modes and - new for this model - ISO. As is now standard on PowerShots, the SD450 sports a print/share button (when connected to a Windows computer with Canon's software it lights up to indicate the camera is ready to transfer. It also lights up when connected to a PictBridge printer). Note that there is now an external ISO control.

Top of camera

Viewed from above you can see just how slim the SD450 is - the main body is only a smidgeon over 20mm deep, and the lens fits completely flush to the body when not in use. The only controls on the top of the camera are the main on/off switch and the shutter release/zoom lever.

Display and menus

Canon's menu and on-screen display system has - despite minor appearance tweaks here and there - remained admirably consistent across camera ranges and generations. The SD450 sports the news playback functions seen on the SD550 and S80, but otherwise it's almost identical to the SD400 before it.

Pressing the DISP button cycles between three preview settings; off (use the optical viewfinder), preview image only (no information displayed) and - as shown above - full information. There's plenty of information ranged around the edge of the preview image. You can also activate a useful 'grid' overlay (visible in the next screenshot). Half press the shutter and the camera will set the focus and exposure, indicating the focus point chosen (in AiAF mode the SD450 chooses from one of nine focus points). Unlike the SD400 before it, the SD450 displays the shutter speed, but only if it is 1/60 sec or below (and therefore there is a danger of camera shake).
A nice new touch is a dedicated ISO button (first seen on the SD550). The ubiquitous FUNC menu has two modes of operation. The default (shown here) is 'auto'. All you can change here is the file size and quality. You also get direct access to the six scene modes (digital macro, portrait, night snapshot, kids and pets, indoor and underwater).
Selecting the 'manual' option gives you additional access to AE compensation, white balance, ISO sensitivity, picture/color effects. As always, the FUNC menu is fast and easy to use. Selecting the 'My Colors' option brings up several extra options, allowing you to boost certain colors, swap colors in the scene, remove all but one color (all other colors come out black and white) or set custom colors. It's not Photoshop, but it's a nice novelty.
Pressing the menu button in record mode brings up a list of less-commonly accessed functions; AiAF focus on/off; self-timer (2/10 secs and custom); AF illuminator on/off; digital zoom on/off; review (2-10 secs); date stamp on/off and long shutter on/off. The last option on the list activates Canon's excellent stitch assist panorama mode. In playback mode you get the option of full screen images with no information overlay or basic information (file number, date and time). A final option is a playback histogram. What you can't see - as in record mode - is any exposure information. The playback menu also offers the option to move from image to image using a fancy dissolve or push transition, which looks cool but slows things down a tad. Finally, a new 'intelligent orientation sensor' rotates playback images as you turn the camera from horizontal to vertical, which is a small thing, but we like it.
Pushing the zoom lever to the left (wide) changes the display to nine (3x3) thumbnails. As is usual with Canon, moving the zoom lever to the left a second time changes the thumbnail display to 'jump' mode, allowing you to quickly move through a page of thumbnails at a time. The zoom lever is also used to zoom into (magnify) images - up to 10x in 10 steps.
The SD450 has lots of neat new interface effects, including a new slide show function, which features very professional-looking TV-style transition effects and is unusually customizable. Nice if you like to hook your camera up to the television. The playback menu has the usual options for protecting (locking) and deleting files, as well as rotating images, viewing a slide show, adding a voice memo and tagging images for printing using DPOF.
The setup menu (accessible from both playback and record modes) is where you find more general camera settings, including sounds, power saving, date and time, LCD brightness, card formatting, language and video output format. Finally, as is now standard on Canon's consumer models, the 'My Camera' screen allows you to customize the camera with your own start-up screen and sounds.
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