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by Nicholas Eveleigh

THE DARK ARTS With megapixels in abundance, low-light performance is the new battle ground for digital cameras–especially SLRs. From left to right: the Nikon D3, the Canon EOS 40D and the Sony Alpha A700.

TREND

More digital cameras now use CMOS (complementary metal-oxide semiconductor) sensors to capture sharper images in dim lighting, with less “pixel noise”–colored flecks that occur at high light-sensitivity settings when the camera’s processor tries to boost the brightness in a dark image.

REASON

SLRs have large sensors that absorb more light than those in point-and-shoots. CMOS is handy at these sizes because it consumes less power than the charge-coupled device (CCD) sensors in earlier models. And CMOS sensors fit noise-reduction circuitry right on the chip.

BENEFIT

At dawn or dusk, you can photograph outdoor vistas too big for a camera flash to illuminate. Inside, you’ll capture scenes in the unique ambient light instead of the harsh, generic glow of flash.

Three Cameras With Virtual Night Vision

** Canon EOS 40D**

As the first company to use CMOS in SLRs, Canon is the benchmark. Capturing 6.5 frames per second, the EOS 40D is one of the fastest semi-professional cameras. Its 10.1-megapixel shots of flowers at sundown were virtually noise-free at a relatively high setting of ISO 800. (The higher the ISO, the greater the light sensitivity.) Even at an extremely high ISO 3200, dimly lit portraits showed surprisingly accurate skin tones.

**$1,300 (without lens); usa.canon.com

**

** Sony Alpha A700**

Sony’s first model with CMOS took immaculate 12.2-megapixel photos of flowers at ISO 800-besting even the Canon. We could preview them on the camera’s gorgeous three-inch LCD or on a high-def TV using the HDMI output. But at ISO 1600, overzealous noise-reduction software in the processor wiped out fine details. And at ISO 3200, our model’s skin had an artificially smooth, doll-like texture.

**$1,400 (without lens); sonystyle.com

**

** Nikon D3**

This pro-grade camera’s 12.1-megapixel sensor is about 2.5 times as large as Canon’s and Sony’s, letting it capture images in near pitch-black at an astounding ISO 25,600. Photos of a dark hallway closet taken at this level with a pre-production D3 were filled with ugly purple noise but still revealed hidden piles of shoes not visible to the human eye. Images of a flower captured on an overcast day at ISO 3200, however, were crisp enough to make attractive letter-sized prints while an indoor shot of a model taken by candlelight at ISO 6500 created a moody portrait despite some grain in the shadow areas.

**$5,000 (without lens); nikonusa.com

**

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