Noise, JPEGs

The T4i's noise profile is pretty good, though like many cameras it fares a lot better in focused areas than out-of-focus ones. Here, it preserves clean detail until about ISO 400, at which point it starts to degrade.
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Photo by: Lori Grunin/CNET / Caption by:

ISO 100

The camera does a reasonable job of resolving detail and rendering sharp images without looking oversharpened.

(1/125 sec, f5.6, ISO 100, spot metering, AWB, 18-135mm lens at 116mm)
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Photo by: Lori Grunin/CNET / Caption by:

ISO 200 JPEG

This looks just a little more processed and mushy than I'd like for such a low ISO sensitivity setting.

(1/125 sec, f7.1, ISO 200, evaluative metering, AWB, 18-135mm lens at 35mm)
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Photo by: Lori Grunin/CNET / Caption by:

ISO 800 raw vs. JPEG

The JPEG version looks comparatively good until you look at edge details like the windowsills.

(1/80 sec, f1.8, ISO 800, spot metering, AWB, 24mm f1.4 lens)
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Photo by: Lori Grunin/CNET / Caption by:

ISO 800 raw vs. JPEG

Color settings differences aside -- and this is one case where I like the deeper tones produced by the default Auto Picture Style -- you can do better processing the raws at ISO 800 (bottom) than with the JPEGs (top).

(1/80 sec, f1.4, ISO 800, evaluative metering, AWB, 24mm f1.4 lens)
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Photo by: Lori Grunin/CNET / Caption by:

ISO 1600

As with most cameras, in-focus areas at high ISO sensitivities look pretty good, but out-of-focus areas display lots of artifacts, including hot pixels.

(1/50 sec, f2.2, ISO 1600, evaluative metering, AWB, 24mm f1.4 lens)
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Photo by: Lori Grunin/CNET / Caption by:

ISO 1600 T4i vs. T3i

The T4i fares worse than the T3i at higher ISO sensitivities, either because of lower sensor response or in-camera overprocessing of the blue channel.

(1/30 sec, f3.5, ISO 1600, spot metering, AWB, T4i: 18-135mm lens at 19mm; T3i 18-55mm lens at 18mm )
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Photo by: Lori Grunin/CNET / Caption by:

ISO 3200 JPEG

Although you can see the noise when you pixel peep, even at ISO 3200 the images are usable if there aren't a lot of shadow areas in them.

(1/60 sec, f2.2, ISO 3200, evaluative metering, AWB, 50mm f1.2 lens)
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Photo by: Lori Grunin/CNET / Caption by:

ISO 6400

You can still get reasonable detail and texture as high as ISO 6400.

(1/30 sec, f4, ISO 6400, spot metering, AWB, 18-135mm lens at 29mm)
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Photo by: Lori Grunin/CNET / Caption by:

Color

The camera produces exceptionally saturated, contrasty photos on its default setting.
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Photo by: Lori Grunin/CNET / Caption by:

Picture Styles

The default Auto Picture Style really pushes the contrast and saturation to the point where hues shift slightly and you start to lose shadow detail.

(1/100 sec, f6.3, ISO 100, evaluative metering, AWB, 18-135mm lens at 35mm)
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Photo by: Lori Grunin/CNET / Caption by:

Bright, saturated colors

Blown out detail in bright, saturated hues can usually be recovered within the raw file.

(1/125 sec, f3.5, ISO 100, spot metering, AWB, 18-135mm lens at 18mm)
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Photo by: Lori Grunin/CNET / Caption by:
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