What's a Stop? We're photographers so we all understand the concept of a stop. In terms of exposure, it simply refers to doubling or halving of the amount of light striking the sensor by changing the shutter speed or the lens' aperture. With digital, we can also change the sensitivity of the sensor - also measured in stops - by doubling or halving the ISO value. Simple, … [Read more...]
The Color Of Invisible Ink
I’m convinced that the fundamental purpose of photography is to allow us to capture a view that couldn’t be seen otherwise. There are lots of reasons for taking a picture; we might want to record a scene or an image of a friend to look at later or perhaps to share with someone else. We might want to use photographic technologies to reveal a scene in a way that can’t be seen with … [Read more...]