If you’re not heavily into photography, the controls on your digital camera are probably a mystery to you, and the terms used in photography are likely a foreign language. One such confusing term is aperture. Here’s a helpful tip on what aperture settings mean, and how it affects your photos. Note: This assumes that you have a DSLR camera, not a fixed-lens point & shoot camera. The aperture of a lens refers to the amount of light a lens lets in when you take a photo. The aperture size is commonly referred to as the F-Stop or F-#. Confusingly enough, a smaller F-# means a larger aperture size, which allows more light in, and creates a narrower depth of field. This means that when taking a portrait photo, the subject will be in focus, and the background will remain out of focus, or blurry. A higher F-# will keep the entire frame in focus.
F-# |
Aperture Size |
Shutter Speed |
Depth of Field |
Higher # |
Smaller |
Slower |
Wider |
Lower # |
Larger |
Faster |
Narrower |
Lens aperture settings are displayed as 1:X or f/X.X. So a lens with the largest aperture would be 1:1.0 or f/1.0. Because these larger aperture lenses are so desirable, they typically cost much more than a lens with a smaller aperture. Why are they desirable? Because they let more light in! That means if you typically do a lot of indoor photography and rely on your flash, these lenses will produce a much more evenly-lit image, rather than your subject being brightly lit and the background nearly blacked-out completely. For more information about camera lenses, I recommend taking a look at this excellent article at Cambridgeincolour.
Rant: Definition of beta, and other software development terms
There was a time, “back then,” when a piece of software that was in Beta meant that the application was feature complete, and the developer was simply releasing the software to a small group of users in order to fix any remaining bugs before releasing the app to the general public. Google changed all that a few years ago when it released GMail to the general public as a beta. To this day, it’s still a beta – even though there are millions of users. That being said, I thought it would be nice to take a look at the definition of some typical software development terms, and what they meant “back then,” and what they really mean “now.” Read on for the definitions.