![]() No, this won't help your auto focus work any better, but it will help you appreciate when it's failing and assist with manual focusing. You can adjust the eyepiece to a fairly large degree, but if you need more eyesight correction, there are replacement diopters available for DSLR/SLR's from many of the major manufacturers in a range from -5 to +4 as needed. On the side of your eyepiece (as shown below) is a small wheel to adjust the focus of your eyepiece in accordance to your vision. You will never know if your subject is in good focus if you can't see what is sharp yourself through the eyepiece. My what? Your diopter - or your eyepiece. This tutorial will give you a better understanding of focus and sharpness, and hopefully help you take photographs that you're very happy with! This is often down to a lack of understanding of how an autofocus (AF) system works. The most common complaints I hear from most photographers of any experience level are "My images aren't sharp" and "I can't get my focus to lock." Most want to blame their equipment and, while there are many instances that equipment is to blame, I have found a vast majority are just simple user error. This tutorial was first published in October, 2009. Twice a month we revisit some of our reader favorite posts from throughout the history of Phototuts+.
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