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.
Most of the photos presented here were captured using the
EF-S 18-55mm f3.5-5.6 II which is sold in the Kit version
of the Rebel XTi. Similarly, the RAW format was used as much
as possible and the RAW images then converted to TIFF using
the "as shot" parameters.
The built-in pop-up flash of the XTi produces an evenly-lit
image, nevertheless a flash compensation of +0.3 EV is used
to make the image a touch brighter in the corners.
Photo Information
Format:
RAW
Aperture:
f4
Exposure:
Program
Shutter Speed:
1/60 sec.
Resolution:
3888 x 2592
Flash:
On
Quality:
—
ISO:
100
File Size:
10.9 MB (RAW)
28.9 MB (TIFF)
Focal Length:
28.8 mm (35mm
Eq)
The image sharpness, when it
is inspected at 100% scale on a monitor, is a bit soft and
becomes softer towards the corners of the image. Colours,
on the other hand, are very natural and there is no trace
of noise anywhere in the image.
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, flash exposure compensation is not necessary to
obtain a bright image. The colours remain true to those that
were captured in the wide angle shot.
Sharpness is better at the telephoto end of the zoom, but
remains a touch soft, although it allows discerning the texture
of the cloth and the printing screen on old photo paper envelope.
Photo Information
Format:
RAW
Aperture:
f5.6
Exposure:
Program
Shutter Speed:
1/60 sec.
Resolution:
3888 x 2592
Flash:
On
Quality:
—
ISO:
100
File Size:
12.8 MB (RAW)
28.9 MB (TIFF)
Focal Length:
88 mm (35mm Eq)
Aperture: f18, shutter speed:
20, ISO 100,
Av mode (Aperture Priority).
MACRO PHOTO
The strength of the SLR system is that it allows the use
of application-specific lenses. For macro photography shots,
Canon offers a number of lenses such as the EF-S 60mm F2.8,
used for this shot.
As always, with the type of image presented here, it is preferable
if lots of light is available so that a small aperture can
be used, maximizing the depth of field.
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.
The image quality and the accuracy of the colour rendition
that the XTi delivers is well-illustrated by by this image.
To take into account account the reflective nature of the
snow. an exposure compensation of +1 EV was used to ensure
that there is a good balance between the brightly lit area
of the frame and those that are not.
Photo Information
Format:
RAW
Aperture:
f8
Exposure:
Program
Shutter Speed:
1/160
Resolution:
3888 x 2592
Flash:
Off
Quality:
—
ISO:
100
File Size:
13.5 MB (RAW)
28.9 MB (TIFF)
Focal Length:
28.8mm (35mm Eq)
ZOOM PHOTO
Zooming in on the entrance of the building, the shadowed
entrance takes on a greater importance for the metering and can cause
an overexposure of sections that are directly lit.
Zoomed in, the exposure the camera captures is excellent.
Details can be seen behind the green-tinted glass doors, as
well as in the directly lit foreground.
Most notable is the absence of noise, and the accuracy of
the metering which is able to capture data in the over-exposed
area.
Photo Information
Format:
RAW
Aperture:
f10
Exposure:
Program
Shutter Speed:
1/200
Resolution:
3888 x 2592
Flash:
Off
Quality:
—
ISO:
100
File Size:
11.7 MB (RAW)
28.9 MB (TIFF)
Focal Length:
88mm (35mm Eq)
While the kit lens does not impart
any distortion to the image, the fact is that the image sharpness
is only average.
NIGHT PHOTO
Since this camera is capable of long exposures,
a photo taken at night is included here.
Aperture: f11, shutter speed 30 sec., 100 ISO.
Offering an automatically timed exposure than can be as long
as 30 seconds, and a B mode, the Rebel XTi is well-equipped
for night photography. It is capable of an unlimited B
(Bulb) mode exposure that requires the use of of an optional
remote control.
Moreover, the Rebel XTi also offers an option that makes
it possible to raise the mirror before an exposure, preventing
any vibrations that might be caused by the mirror moving at
the beginning of an exposure.
Using an exposure of 30 seconds at 100 ISO
— the lowest sensitivity so as to ensure the least noise
in the exposure — and the noise reduction system set
to Auto, the Rebel XTi decided that this exposure did
not require noise reduction processing. Indeed, the section
of the image shown below at 100% scale, contains no noise.
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Test Photos
