Here are a few images that accurately reflect the abilities
of any given camera model. The images are altered only in
terms of size and sharpness after reduction and by the JPEG
compression used. Unless otherwise mentioned, assume that
any marbling or artifacts visible in the images are due to
the compression required to display them here. We feel however,
that they still faithfully represent the results we experienced.
STILL LIFE PHOTO
This subject is photographed in a room that
has a mix of fluorescent and incandescent light, but which
is not brightly lit. The camera's flash is used to add fill
light. The backdrop is 1.95 m (6.5 ft) from the camera.
The images presented here are captured using the Rebel XT's
RAW image format, which have a *.CR2 extension.
The images were then opened using Digital Photo Professional,
one of the programs included with the camera. Although the RAW
image includes the camera settings for the image, these are
not applied, which allows them to be modified when the image
is being processed prior to being saved into a more common file
format.
Photo Information
Format:
RAW (CR2 format)
Aperture:
f4
Exposure:
Program
Shutter Speed:
1/60 sec.
Resolution:
3456 x 2304
Flash:
On
Quality:
Uncompressed
ISO:
100
File Size:
9.9 MB (RAW)
23.4 MB (TIFF)
Focal Length:
18 mm = 28.8 mm (35mm Eq)
Equipped with the kit lens, an
18 to 55mm which corresponds to a 28.8 to 88mm focal length
when mounted on the Rebel XT, the camera is able to capture
a wide field of view.
ZOOM
PHOTO
Now we zoom in on a specific area. The intent
is to test the sharpness of the image at the zoom's maximum
setting. The camera remains at the same distance as with the
preceding photo.
Zoomed in the RAW image exhibits a slightly different colour
tone than the wide angle photo, and the colour balance needs
to be adjusted to match the colour of the wide angle photo.
The 8-megapixel CMOS sensor yields a bright and detailed
image, and while the RAW format is used for these images,
in normal use the Large/Fine JPEG produces excellent results.
Photo Information
Format:
RAW (CR2 format)
Aperture:
f5.6
Exposure:
Program
Shutter Speed:
1/60 sec.
Resolution:
3456 x 2304
Flash:
On
Quality:
Uncompressed
ISO:
100
File Size:
9.9 MB (RAW)
23.4 MB (TIFF)
Focal Length:
88 mm (35mm Eq)
Aperture: f18, shutter speed: 1/15, ISO 100.
MACRO PHOTO
Using the kit lens however, the closest distance from the
front of the lens that can be used is approximately 12 cm
(4.72 inches) and the field of view is approximately 7cm (2.75
inches).
BUILDING PHOTO
This image is our outdoor test. The architecture
of the building, in particular the angled girders, immediately
shows the presence of jaggies. The shadowed entrance can also
often reveal the quality of the exposure.
Once again, the advantage of a wide angle lens is obvious
with a subject such as this. The lens is able to capture a
large section of the building, a field of view that is very
practical for outdoor/architectural photography, or indoors
as it can capture large sections of a room.
Photos captured with the 18 to 55mm kit lens reveal no major
chromatic aberration, nor any blatant barrel distortion as
long as the subject is relatively distant.
Photo Information
Format:
RAW (CR2 format)
Aperture:
f9
Exposure:
Program
Shutter Speed:
1/200
Resolution:
3456 x 2304
Flash:
Off
Quality:
Uncompressed
ISO:
100
File Size:
9.9 MB (RAW)
23.4 MB (TIFF)
Focal Length:
28.8mm (35mm Eq)
ZOOM PHOTO
The image the Rebel XT produces is sharp, has accurate colours
and the deep shadow areas in this telephoto shot highlight
one of the camera's strengths: very low sensitivity to noise,
even at high ISO settings.
With the 18 to 55mm kit lens, no distortion or aberration
is noticeable at the maximum telephoto setting, and the images
show excellent sharpest uniformly throughout the frame, as
they go at the widest angle.
Photo Information
Format:
RAW (CR2 format)
Aperture:
f8
Exposure:
Program
Shutter Speed:
1/160
Resolution:
3456 x 2304
Flash:
Off
Quality:
Uncompressed
ISO:
100
File Size:
9.9 MB (RAW)
23.4 MB (TIFF)
Focal Length:
88mm (35mm Eq)
NIGHT PHOTO
Since this camera is capable of long exposures,
a photo taken at night is included here.
Aperture: f5, shutter speed 30 sec., 100 ISO.
Noise reduction is automatically applied to
all long exposures slightly softening the natural sharpness
of the image, but still making it possible to see a quantity
of details in the image that would be impossible to see with
the naked eye. In addition, as part of Custom Functions, the
Rebel XT also offers an extension to the noise reduction feature
that is designed for bulb exposures longer than 30 seconds.
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Test Photos
