What's It All About, Appy?

Here is an interesting article explaining aperture, f/stops and depth of field, courtesy of a great resource, Digital Photography School (DPS):

Welcome to the fifth lesson in Photography 101 - A Basic Course on the Camera. In this series, we cover all the basics of camera design and use. We talk about the ‘exposure triangle’: shutter speed, aperture and ISO. We talk about focus, depth of field and sharpness, as well as how lenses work, what focal lengths mean and how they put light on the sensor. We also look at the camera itself, how it works, what all the options mean and how they affect your photos. Read on