QUICKREFERENCE GUIDE 4
Image Quality
Optimization Tips
Avoid unintentional motion blur:
Assuming an accuratelyfocused subject, you can maximize image quality by eliminating
unwanted motion blur. To reduce the effectsof camera shake, use a tripod when possible.
Use an Image Stabilizer lensfor handheld photography. To eliminate unwanted blur
caused bysubject movement, use faster shutter speeds or electronic flash.
Avoid inadvertent camera or subject movement after focus lock:
Ifyou are using One-Shot AF, do not move the camera towardsor away from the subject
after locking focus, especiallyfor subjects within 15 feet of the camera.
Avoid the use of small apertures with wide-angle or wide zoom lenses:
Smallapertures can cause sharpness-degrading diffraction when using wide-angle or
wide zoom lenses.
Consider the use of in-camera sharpening:
Ifyou shoot JPEGs and you wish to reduce or eliminate the need for post-processing in
order to speed up your workflow, you mayfind that increasing the level of in-camera
sharpening iseffective.
Apply post-process sharpening effectively:
Canon EOSdigital cameras have an anti-aliasing filter installed on the image sensor.
Thisfilter improvescolor rendition and practically eliminates moiré. The liability is a
slightreduction of sharpness. To reduce the softening effect of the anti-aliasing filter we
recommend applying an unsharp maskto the image in Adobe®Photoshop®. Although
there isno such thing as a “best” setting for all applications, we suggest the following
asa starting point:
Amount: 300%
Radius: 0.3 pixels
Threshold: 0 pixels
Understand that image magnification affects perceived sharpness:
When viewing imagesat 100% magnification, the actual image size can be as large as
4 x6 FEET depending on the resolution of the camera. If your images are regularly
printed at8.5" x 11" or less, the equivalent magnification with EOS-1D Mark II would be
approximately33%, or 25% with an EOS-1Ds. Try printing your images to evaluate
sharpness.