<p>Now that the basketball season is underway, I'm shooting games frequently. The main reason for discards is focus errors. I understand this is typical. I'd like a discussion of what works best. Here's what I've found:</p>
<ul>
<li>I use the center spot only.</li>
<li>After reading an article about back-button focus I tried this technique. Focus errors increased.</li>
<li>I got a handgrip/battery pack to make it easier to shoot vertical (basketball is a vertical game). Focus errors dropped. I hadn't expected this. I'm wondering of the feel of the shutter release makes a difference. I also had fewer slanted shots that needed to be rotated a few degrees. I expected this.</li>
</ul>
<p>What other techniques have worked?</p>