比較 PowerShot A630 和 Digital IXUS 850 IS

如果你有心學影相，當然買A630好啦(而且平d)
因為A630有齊M/A/T(手動/光圈先決/快門先決)
另外A630有個特點就係佢個MON可以扭的，方便不同角度拍攝，而且用4粒AA電池，AA電池可以隨時買到。佢有4倍變焦(35MM-140MM)比820 IS影得遠一D。
而850 IS 就係全自動機一部，但有防手震尼個功能，而佢又有28MM可以影WIDE一D(28MM-105MM)影風景or大合照時都幾有用，外型又靚仔&細部D。

Canon 的 PowerShot A630比較好
功能:
Type


8.0 Megapixel, 1/1.8 inch type Charge Coupled Device (CCD)



Total Pixels


Approx. 8.30 Megapixels



Effective Pixels


Approx. 8.0 Megapixels



Lens



Focal Length


7.3-29.2mm f/2.8-4.1 (35mm film equivalent: 35-140mm)



Digital Zoom


4x



Focusing Range


Normal: 1.5 ft./45cm-infinity
Macro: 0.39 in.-1.5 ft./1-45cm (WIDE), 9.8 in.-1.5 ft./25-45cm (TELE)



Autofocus System


TTL Autofocus



Viewfinders



Optical Viewfinder


Real-image optical zoom viewfinder



LCD Monitor


2.5 inch low-temperature polycrystalline silicon TFT color LCD



LCD Pixels


Approx. 115,000 pixels



LCD Coverage


100%



Aperture and Shutter



Maximum Aperture


f/2.8 (W) - f/4.1 (T)



Shutter Speed


15-1/2500 sec. (settable in Tv and M)



Exposure Control



Sensitivity


Auto, High ISO Auto, ISO 80/100/200/400/800 equivalent



Light Metering Method


Evaluative, Center-weighted average, Spot** Metering frame is fixed to the center or linked to the AF frame



Exposure Control Method


Program AE, Shutter Speed-Priority AE, Aperture-Priority AE, Manual



Exposure Compensation


+/-2 stops in 1/3-stop increments



White Balance



White Balance Control


Auto, Preset (Daylight, Cloudy, Tungsten, Fluorescent, Fluorescent H, Underwater), Custom



Flash



Built-in Flash


Auto, Auto w/ Red-Eye Reduction, Auto w/ Slow Synchro, Flash On, Flash On w/ Red-Eye Reduction, Flash On w/ Slow Synchro, Flash Off



Flash Range


Normal: 1.5-14 ft./45cm-4.2m (W), 1.5-9.8 ft./45cm-3.0m (T)
Macro: 9.8 in.-1.5 ft./25-45cm (W/T) (when sensitivity is set to ISO Auto)



Recycling Time


10 sec. or less (battery voltage=6.0V)



Flash Exposure Compensation


+/-2 stops in 1/3-stop increments



Shooting Specifications



Shooting Modes


Auto; Creative: P, Av, Tv, M, C; Image: Portrait, Landscape, Night Scene, Special Scene (Foliage, Snow, Beach, Fireworks, Underwater, Indoor, Kids & Pets, Night Snapshot, Color Accent, Color Swap), Stitch Assist, Movie



Photo Effects


My Colors
Vivid, Vivid Blue, Vivid Green, Vivid Red, Neutral, Sepia, Black & White, Positive Film, Lighter Skin Tone, Darker Skin Tone, Custom Color



Self-Timer


Activates shutter after an approx. 2-sec./10-sec. delay, Custom



Wireless Control


Not available



Continuous Shooting


Approx. 1.8 fps



Image Storage



Storage Media


SD Memory Card, SDHC Memory Card, MultiMediaCard



File Format


Design rule for camera file system, DPOF Version 1.1



Image Compression


Still Image: Exif 2.2 (JPEG)
Movie: AVI (Image: Motion JPEG; Audio: WAVE (Monaural))



JPEG Compression Mode


Normal, Fine, SuperFine



Number of Recording Pixels


Still Image: 640 x 480 (Small), 1,600 x 1,200 (Medium 3), 2,048 x 1,536 (Medium 2), 2,592 x 1,944 (Medium 1), 3,264 x 2,448 (Large), 3,264 x 1,832 (Widescreen)
Movie: 640 x 480 / 320 x 240 (30 fps/15 fps) available up to 1GB or 60 minutes, 160 x 120 (3 min. at 15 fps))