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The D-Lux 4 has all of the features that make the LX3 so good. Foremost among these is its superb f/2.0 – f/2.8 wide-angle lens, a 2.5x zoom equivalent to 24-60mm. This lens is Leica's major contribution to the success of the design. While some might find the limited zoom range to be restrictive, the fast maximum aperture gives the camera outstanding low light ability at all zoom settings, while the sheer optical quality gives the D-Lux 4 serious photographic credentials.
Other features include full manual exposure control, with a minimum aperture of f/8.0 and shutter speeds from one minute to 1/2000th of a second. It has a full range of metering options including spot, centre-weighted, multi-zone and face priority, and sensitivity settings up to 3200 ISO. Like the LX3 it has multiple AF modes, including tracking AF, multi-zone auto, as well as wide, medium and centre-spot single-zone AF. Naturally is also has manual focus.
One very unusual feature is the range of aspect ratios available, selected by a slider switch on the top of the lens barrel. Like the LX3 the D-Lux 4 has a large 11.3MP sensor, but different areas of the sensor are used in different aspect ratio settings giving it greater than usual image resolution at non-standard settings. In 4:3 aspect ratio the full 10-megapixel resolution is used, but it only drops half a megapixel to 9.5MP when switched to the 3:2 setting (the same ratio as 35mm film). It can also shoot in 16:9 format at 9MP.
The D-Lux 4 also has the same HD video recording mode as the LX3, shooting in 1280 x 720 resolution at 24 frames per second with mono audio. Clips are limited to 10 minutes in HD mode, and the optical zoom cannot be used while recording.