Canon Digital IXUS 75 Review
(also known as the Canon Powershot SD750)
Review Date: August 2nd 2007
Author: Mark Goldstein
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Image Quality
All of the sample images in this Review were captured using the Superfine JPEG
setting with the large (3072 x 2304 / 7.1M) image size option
producing a file that is between 2.5-4Mb.
Noise
The Canon Digital IXUS 75 has 6 ISO
settings. There is virtually no discernible noise at the
slowest settings of ISO 80, 100 and 200, but noise and slight
loss of detail is apparent at ISO 400, particularly in the
shadow areas. At ISO 800 image quality has deteriorated quite
a lot as the camera blurs detail to try and hide the noise.
ISO 1600 should really be avoided at all costs. Here are
some 100% crops which show the noise levels for each ISO
setting.
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 at the default setting are soft and benefit
from some further sharpening in a program like Adobe Photoshop.
Alternatively you can change the in-camera sharpening level
if you don't like the default results.
File Quality
The Canon Digital IXUS 75 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 75 handled
chromatic aberrations quite well during the review, with
some limited purple fringing present around the edges of
objects in certain high-contrast situations. Here are some
100% crops which show the typical chromatic aberrations that
you can expect:
Macro
The Canon Digital IXUS 75 offers a
Macro setting that allows you to focus on a subject that
is 3cms 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 75 are Auto, On, Auto Red-eye Reduction, Slow Synchro
and Off. These shots of a white coloured wall were taken
at a distance of 1.5m.
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Auto
Flash - Telephoto (105mm) |
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And here are some portrait shots.
As you can see, neither the Flash On or Red-Eye Reduction
settings caused any discernible 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 75's maximum
shutter speed is 15 seconds in Long Shutter Mode, which is
good news if you're interested in night photography. The
shot below was taken using a shutter speed of 10 seconds,
aperture of f/2.8 at ISO 80. I've included a 100% crop of
the image to show what the quality is like.
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Night
Shot (100% Crop) |
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Overall Image Quality
The Canon Digital IXUS 75 produced
images of good quality during the review period. As expected
from previous use of Canon cameras, colours are naturalistic
bordering on warm, especially when it comes to skin tones,
which is no bad thing. And of course there's the added ability
to adjust these in-camera if so wished. The Canon Digital
IXUS 75 dealt quite well with chromatic aberrations, with
limited purple fringing effects appearing only in high contrast
situations. The built-in flash worked well indoors, with
no red-eye and good overall exposure. The
night photograph was good, with the maximum shutter speed
of 15 seconds allowing you to capture enough light in most
situations. Macro performance is above average, allowing
you to focus as close as 3cms away from the subject. The 7 megapixel images were quite soft
straight out of the camera at the default sharpening setting
and ideally require some further sharpening in an application
like Adobe Photoshop, or you can change the in-camera setting.
Utilising the new face detection feature didn't make a great
deal of difference if I'm being honest, as there's the tendency
of the user to pre-focus on the subject – and obviously a
face if taking a portrait – before fully pressing the shutter
button. The Canon Digital IXUS 75 produces noise-free
images at ISO 80, 100 and 200, with ISO 400 showing some
noise and slight blurring of detail. ISO 800 has quite visible
noise and ISO 1600 is best avoided at all costs.
 PhotographyBLOG
is a member of the DIWA
organisation. Our test results for the Canon Digital IXUS 75 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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