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QUICK REFERENCE GUIDE 4
Image Quality
Optimization Tips
A
void unintentional motion blur:
As
suming an accurately focused subject, you can maximize image quality by eliminating
u
nwanted motion blur. To reduce the effects of camera shake, use a tripod when possible.
U
se an Image Stabilizer lens for handheld photography. To eliminate unwanted blur
c
aused by subject movement, use faster shutter speeds or electronic flash.
Avoid inadvertent camera or subject movement after focus lock:
If you are using One-Shot AF, do not move the camera towards or away from the subject
after locking focus, especially for subjects within 15 feet of the camera.
Avoid the use of small apertures with wide-angle or wide zoom lenses:
Small apertures can cause sharpness-degrading diffraction when using wide-angle or
wide zoom lenses.
Consider the use of in-camera sharpening:
If you shoot JPEGs and you wish to reduce or eliminate the need for post-processing in
order to speed up your workflow, you may find that increasing the level of in-camera
sharpening is effective.
Apply post-process sharpening effectively:
Canon EOS digital cameras have an anti-aliasing filter installed on the image sensor.
This filter improves color rendition and practically eliminates moiré. The liability is a
slight reduction of sharpness. To reduce the softening effect of the anti-aliasing filter we
recommend applying an unsharp mask to the image in Adobe
®
Photoshop
®
. Although
there is no such thing as a “best” setting for all applications, we suggest the following
as a starting point:
Amount: 300%
Radius: 0.3 pixels
Threshold: 0 pixels
Under
stand that image magnification affects perceived sharpness:
When viewing images at 100% magnification, the actual image size can be as large as
4 x 6 FEET depending on the resolution of the camera. If your images are regularly
printed at 8.5" x 11" or less, the equivalent magnification with EOS-1D Mark II would be
approximately 33%, or 25% with an EOS-1Ds. Try printing your images to evaluate
sharpness.