Pentax Optio MX

Photos can vary in resolution from 2,048x1,536 down to 640x480, with a choice of three JPEG compression rates. On the video side, you can save your video captures as MPEG-4 files in resolutions ranging from 640x480 to 160x120 with either a 30fps or 15fps frame rate. There's also a frame-rate multiplier for time-lapse video that slows down the video recordings by a factor of 2, 5, 10, or 20. Unlike many digital cameras with a video mode, the Optio MX's zoom is fully functional when shooting video.

The most notable accessory for the Optio MX is a wide-angle lens adapter that screws onto the front of the standard lens and provides a 35mm-camera equivalent of a 28.5mm wide-angle lens. It works well with both photos and video shots, and it's ideal for those trendy big-nose close-ups of family pets.

Given the low price and the hybrid capabilities of the Pentax Optio MX, you might expect a middling performance. That's just what you get. On the plus side, the high-speed continuous-shooting mode can crank out three quick-burst photos in 1.12 seconds. The regular high-speed mode, which operates until the memory card is full, packs them in at a more leisurely 2.32 seconds per shot (on average). In single-shot mode, shot-to-shot times for nonflash and flash shots came in at 3.39 and 3.83 seconds, respectively, which is a bit slow. On the minus side, you'll have to be on your toes and react quickly, because the camera's wake-up-to-first-shot time of 6.43 seconds is one of the slowest we've seen recently.

The camera's zoom control has two speeds that are triggered by the pressure you exert on the control lever. Having only two speeds isn't a problem for photos, but it can be limiting for video. The slow speed takes about 10 seconds to travel the full distance of the zoom, while the fast speed runs about 3 seconds.

Some performance shortcomings manifest in both photo and video recording. The camera frequently had difficulty automatically focusing when the lens was extended to the telephoto position, even at a modest distance in broad daylight. Sometimes it would take several seconds; other times it couldn't focus no matter how long we held the shot. Both the manual process of zooming the lens and the automatic adjustment of the lens' aperture created noise that was barely audible to those near the camera. It was clearly audible on the video recordings, especially if there wasn't enough ambient sound to mask it.

The LCD image is easy to see, except in bright sunlight. It freezes for about 1 second during prefocus (when you half-press the shutter button), which makes it difficult to follow a moving subject. There's no optical viewfinder, so for better or worse, the LCD is your only guide for aligning the camera.

While the Pentax Optio MX's poor responsiveness meant some shots were slightly out of focus, when it did grab a satisfactory shot, the image was decent for a 3.2-megapixel photo. The colors were generally accurate and well saturated, with occasional blooming in high-contrast areas. Most of the bad shots occurred when the subject was moving or while the camera was attempting to determine the proper focus. Accordingly, this camera is better suited for static shots, such as portraits or tripod-assisted landscapes, as opposed to action-filled sports events or spur-of-the-moment crowd shots. Purple fringing was visible along some of the high-contrast edges in both the photos and videos. Red-eye was less of a problem with this camera than many others we've tested, because the flash mechanism pops into a position several inches above the lens.

With the recorded video, there was a tendency for the image to tear horizontally when panning the camera and for the image to blur, even at moderate panning speeds. Similar to the static photos, our static video shots were sharp and well defined, had accurate and pleasing colors, and were properly exposed. We were surprised that the 30fps video captures weren't as rock-steady as we've come to expect at that frame rate. Once again, the less movement there was, the less this was noticeable. The video recordings were relatively free of visual noise and compression artifacts. Low-light photos and videos did remarkably well in keeping the visual noise and color distortion in check.