How to get clear images?

But let's get some tutorial about calibrating auto focus on some DSLR up here.
"If you have a DSLR with AF microadjustment capabilities and focus adjustment is necessary, adjust your camera and try the test again. Repeat if necessary. Repeat for all of your lenses - the improvement in their performance may surprise you."
http://www.the-digital-picture.com/Reviews/Datacolor-SpyderLensCal-Review.aspx

When I need to better focus, I don't use AF (autofocus.)

In parting, I also learned to add more light or change the lighting to make better pictures.
Bob

I assume you have a digital camera - Which One? - Make and Model

Check to see if camera is set to AUTO.
Check the front of the lens (glass) and look for fingerprints or smudges. Clean if necessary
(use soft clean dry lint free , cotton cloth)

Find the photo file on computer.
Right Click on file name.
Click "Properties".
Click "Details" tab.
Scroll down.
What does it show for the following.
F-stop
Exposure time
ISO speed
Focal length
Flash Mode

...