Q–I make small-scale models of different items. What is the best way to create realistic backgrounds with my close-up photographs? A–If you have a slide projector, or can borrow one, you can ...

What does parallax error actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

Rifle scope parallax is often misunderstood. Here is a simple guide to how parallax works and how it applies to rifle shooting.

Parallax is the observed displacement of an object caused by the change of the observer's point of view. In astronomy, it is an irreplaceable tool for calculating distances of far away stars.