Add Yahoo as a preferred source to see more of our stories on Google. Grouping all digital activities together misses how different types of screen use affect people, a Penn State researcher writes.

So, I'm trying to do more manual focus, but I'm having issues at times, likely due to the way dSLR manufacturers have prioritized auto-focus over manual focus in their AF systems & focusing screens.

Many of us spend more time than we want to on our smartphones, tablets, and other devices, in this article we will show you how to reduce your screen time with a range of practical tips. Our lives are ...