Canon 350D/Rebel XT Nighttime Noise Tests

We test the Canon 350D / Rebel XT for image noise at all ISO settings at night and provide the RAW files so they can be downloaded, if desired, for personal examination.
We test the Canon 350D or Rebel XT for noise in nighttime lighting.

The RAW files for these images are available on the special digital camera section of the site for download so that you can examine the images yourself.

Exposures were 30 seconds, with aperture varied for the correct exposure, in shutter priority mode, since we are interested in camera noise rather than lens sharpness. The lens used here was the Canon 100mm f2.8 Macro lens.

Canon 350D / Rebel XT Noise Test
100ISO NR on

Canon 350D / Rebel XT Noise Test
100ISO NR off

Here the only effect of noise reduction being on is a very slight softening of detail (you won’t see it here, only by zooming right in on the RAW files) and thus a very slight spreading out and making less apparent of the noise.

Canon 350D / Rebel XT Noise Test
200ISO NR on

Canon 350D / Rebel XT Noise Test
200ISO NR off

At 200ISO the same applies as for 100ISO and I actually think the version with no noise reduction looks better.

Canon 350D / Rebel XT Noise Test
400ISO NR on

Canon 350D / Rebel XT Noise Test
400ISO NR off

Again very close.

Canon 350D / Rebel XT Noise Test
800ISO NR on

Canon 350D / Rebel XT Noise Test
800ISO NR off

At 800ISO I’d say there is a very slight advantage to the NR on image, but it is very close.

Canon 350D / Rebel XT Noise Test
1600ISO NR on

Canon 350D / Rebel XT Noise Test
1600ISO NR off

Again very little to pick. In fact I would say that all the noise reduction does is to remove the hot pixels that you see with NR off.

In conclusion, I’d have to say the NR makes little difference to these night shots, except for fixing the hot pixel issue, but at the cost of doubling the exposure time.

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