Canon Digital Ixus 750
(Canon PowerShot SD550 in the USA)
Review Date: November 21st 2005
Image Quality
All of the sample images in this Review were taken using
the 7M Superfine mode, which gives an average image size of
around 2.5Mb - 3.5Mb.
Noise
There are 4 ISO settings available on the Canon Digital Ixus
750 which you can select at any time if the camera is in the
Manual mode. Here are some 100% crops which show the noise
levels for each ISO setting:
There is virtually no discernible noise at the slowest settings
of ISO 50 and 100, and ISO 200 also looks very clean. Noise
can be seen at the fastest ISO speed of 400, but overall the
Canon Digital Ixus 750 deals very well with a problem that
afflicts most compact digital cameras.
Sharpening
Here are two 100% crops which have been Saved as Web - Quality
50 in Photoshop. The right-hand image has had some sharpening
applied in Photoshop. The out-of-the camera images are a little
soft at the default setting and benefit from some further
sharpening in a program like Adobe Photoshop. Alternatively
you can decrease the in-camera sharpening by choosing the
Low Sharpening image effects option.
File Quality
The Canon Digital Ixus 750 has 3 different file quality settings
available, with Superfine being the highest quality option.
Here are some 100% crops which show the quality of the various
options, with the file size shown in brackets.
Chromatic Aberrations
The Canon Digital Ixus 750 handled chromatic aberrations
extremely well during the review, so well in fact that I could
only find a single example with just a tiny hint of purple
fringing present around the edges of the building.
Macro
The Canon Digital Ixus 750 offers a Macro setting that allows
you to focus on a subject that is 5 cms away from the camera.
The first image shows how close you can get to the subject
in Macro mode (in this case a compact flash card). The second
image is a 100% crop.
Flash
The flash settings on the Canon Digital Ixus 750 are Auto,
On, Auto Red-eye Reduction, Slow Synchro and Off. These shots
of a magnolia coloured wall were taken at a distance of 1.5m.
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Auto Flash - Telephoto (111mm) |
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And here are some shots of yours truly. As you can see, both
the Flash On setting and the Red-Eye Reduction option caused
a tiny amount of red-eye.
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Flash On (100% Crop) |
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Flash - Red-Eye Reduction (100%
Crop) |
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Night Shot
The Canon Digital Ixus 750 maximum shutter speed is 15 seconds,
which is good news if you're seriously interested in night
photography. The shot below was taken using a shutter speed
of 15 seconds, aperture of f/2.8 at ISO 50. I've included
a 100% crop of the image to show what the quality is like.
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100% Crop |
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Overall Image Quality
The Canon Digital Ixus 750 produced images of excellent quality
during the review period. The 7 megapixel images werea little
soft straight out of the camera and ideally require some further
sharpening in an application like Adobe Photoshop. The Canon
Digital Ixus 750 dealt very well with chromatic aberrations,
which only appeared in one of the test shots - very limited
purple fringing effects could only be seen in very high contrast
situations. Macro performance is above avearge, allowing you
to focus as close as 5 cms away from the subject. The built-in
flash worked well indoors with no red-eye and good overall
exposure. The night photograph was very good too, with the
maximum shutter speed of 15 seconds offering lots of scope
for creative night photography. The Canon Digital Ixus 750's
handled noise very well too, with ISO 50-200 showing hardly
any signs of noise and even the fastest speed of ISO 400 being
perfectly usable.
 PhotographyBLOG
is a member of the DIWA
organisation. Our test results for the Canon Digital Ixus
750 have been submitted to DIWA
for comparison with test results for different samples of
the same camera model supplied by other DIWA
member sites.
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