Jeffrey Friedl's Blog » Jeffrey’s Autofocus Test Chart

A cracking article on Jeffrey Friedl's blog about testing the autofocus on your camera and lenses ...

This post describes an autofocus test chart I've developed, why I think it's better than others I've seen, and how to use it to test the autofocus of your camera and lens:

1. Introduction


2. What Makes a Good Test Chart


3. How to Print It (downloading offered here)


4. Preparing to Use It


5. Taking the Shot


6. Interpreting the Results

1. Introduction

If you suspect that your modern SLR or SLR lens has autofocus problems, you can use a chart like the one offered on this page to perform some tests.

... full article after the link

via Jeffrey Friedl's Blog » Jeffrey’s Autofocus Test Chart.