By David D. Busch, CNET.com
21/06/2006
URL: http://asia.cnet.com/reviews/digitalcameras/0,39005881,39097728p,00.htm

The versatile, water-resistant 8-megapixel Olympus Mju 810 adapts to dim environments as readily as it braves damp ones. Thanks to a combination of high sensitivity (up to ISO 3,200), digital image stabilization, and Olympus's Bright Capture pixel-pooling technology, the Mju 810 can take and display acceptable pictures in low light. Unfortunately, this camera doesn't do as well in fair weather--its LCD tends to wash out in bright sunlight. If you don't need quite as many bells and whistles, you can save a bit by opting for the Mju 810's little brother, the Olympus Mju 700.

Design

	Guide provides a series of options and instructions for common activities such as brightening the subject or shooting against a light.

The Olympus Mju 810's sleek, 170g stainless steel body is easily pocketable and less than an inch thick, with its 35mm-to-105mm-equivalent lens fully retracted. Unlike its resilient brother, the Mju 720 SW, the Mju 810 isn't submersible, but it has better sealing and gasket coverage than a typical camera, which allows its weather-resistant body to keep shooting despite a bit of dust or precipitation.

You can easily manipulate most of the camera's controls with your right thumb, so the Mju 810 is well suited for one-handed shooting. Besides a power switch and a shutter release on the top panel, all camera controls are clustered on the back panel, next to the 2.5-inch, 230,000-pixel LCD. These controls include a zoom rocker and a simple mode dial with only five settings: movie mode, scene selection, playback, recording mode, and Guide.

	The cursor keys themselves serve double duty, used to navigate the camera's menus and to adjust specific options such as EV (plus or minus 2EV in 1/3-stop increments), self-timer, flash, and macro/supermacro.

The four-way-plus-Ok control pad is surrounded by four additional keys: Menu, digital image stabilization/printing, trash, and display. The last button cycles the camera's LCD through various modes, including a rule-of-thirds grid for composition and a live histogram. The OK/function key opens a menu of the most frequently used shooting options: White balance, ISO, drive mode, and metering.

Features
The Olympus Mju 810 can hit some incredibly high sensitivity settings for its class: ISO 1,600 and ISO 3,200 for extreme low-light or high-speed shots. It does so via Bright Capture, which uses clusters of sensor pixels to capture a each single image pixel, rather than individual ones (a process known as supersampling), effectively creating bigger pixels, each of which is more sensitive to light. Unfortunately, this results in fewer pixels in the final image; the Mju 810 can take ISO 3,200 shots at only 3-megapixel resolution. Olympus uses Bright Capture in a similar way--clustering pixels to increase the amount of light emitted--to boost the brightness of the LCD.

Unlike the high-ISO settings, the electronic image stabilization works in most shooting modes, including movie, though not burst mode. You can also apply it during playback.

The 3x optical zoom lens can focus on objects between 10 and 60cm in supermacro mode. If you don't need to get quite so close to your subject, standard macro can focus from 21cm to infinity. The lens's aperture is fixed at F2.8 at the wide-angle setting and F4.7 when fully zoomed in. The Olympus Mju 810 has no manual focus or exposure controls other than exposure compensation, but its 24 scene modes include various preset options such as Behind Glass, Documents, and Auction. The Shoot and Select scene modes are a variation on burst mode; you shoot a continuous sequence of pictures, which appear on the LCD. You can then keep or delete whatever shots you want from the batch.

Both multipoint/spot focus and exposure options are available on the Mju 810. After you've set those, the camera automatically chooses a shutter speed between 1/2 second to 1/1,000 second in normal shooting modes and up to 4 seconds in night scene modes. This model has 28MB of built-in memory; it's good for a few shots, but you'll want an xD-Picture Card to take more than a handful of photos at a time. If you want to use the camera's panorama mode to stitch up to 10 frames into one shot, you'll need an Olympus-brand card; it won't work with any others.

The Mju 810 has some interesting playback features, including in-camera albums and a calendar display that sorts images by date taken. With a Type H xD card, it can shoot 640 x 480, 30fps film clips with sound up to the capacity of the card; with others, you're limited to 15-second clips. Neither zoom nor focus can be adjusted while shooting.

Performance
The Olympus Mju 810 displayed its best performance figures in burst mode, although its speed comes at a price; continuous shooting works at only 2,048 x 1,536 (3 megapixels) and 1,024 x 768 (submegapixel) resolutions. In both resolutions, we were able to squeeze off 12 shots in about 2.6 seconds, for an impressive rate of 4.6fps. The lower-end Mju 700 supports full-resolution burst shooting but at just 1.5fps.

Other shooting speeds were acceptable but not exactly stellar. The camera took 2.7 seconds to power up and shoot after pressing the button. After that, it took a sluggish 3 seconds from shot to shot, bumping up to 3.5 seconds with the onboard flash enabled. Shutter lag was an adequate 0.7 second when shooting a high-contrast subject, slowing to a less adequate 1.5 seconds with a low-contrast subject.

The camera's autoset higher ISO settings help extend the camera's tiny built-in flash range to 5.1m. Coverage was fairly even, although the red-eye-prevention feature did a poor job. Bright Capture made the LCD nicer to view indoors under dim lighting, but we noticed a bit of ghosting. Unfortunately, the display tends to wash out in bright sunlight.

Image Quality
Image quality was generally good, with lots of detail in both highlights and shadows, and we noticed fewer JPEG artifacts than we've seen in other recent compact cameras. Highlights tended to blow out, and we saw textbook examples of lateral chromatic aberrations: Well-defined cyan and magenta ghost images, respectively, to the left and the right of high-contrast subjects.

Noise is the biggest problem with the Olympus Mju 810. Quite visible by ISO 400, it added a distinct texture to most images at ISO 800 and above. Unless you're a fanatic about grain or don't try to print or view the images at too large a setting, you'll probably find this camera's high-ISO shots acceptable, especially compared to the alternative of dark, blurry pictures. The digital image-stabilization feature provided one to two stops of blur protection.