Week two of the 6-week on-line Digital Photography Basics course I'm taking focused on EXPOSURE.
I learned that there is an "exposure triangle" where the combination of the size of the lens opening (Aperture), the length of time that the camera sensor is opened (Shutter speed) and the sensitivity of the sensor (ISO Setting) work together to capture the scene. When one part of the equation is off, it affects the outcome of the photo.
Who knew math and geometry was part of photography?
When a photo is too light, it is over-exposed. The white area is referred to as being "blown out "and the camera fills it in with white pixels. It cannot be rescued- even with editing programs. When a photo turns out too dark, it is considered underexposed. The sensor responds by filling in the area with black pixels.
Since it's often difficult to discern a good photo by viewing it on the camera screen, there is a graph in the camera that aids the photographer in exposure alignment. The graph is known as a Histogram and measures placement of light and dark. If a photo is over-exposed the peaks will be skewed to the right and if under-exposed; skewed to the left.
To compensate for exposure problems, the camera has a setting known as Exposure compensation! By moving the adjuster to the left or right, the camera can adapt to the available light.
This one is over-exposed- but I really like it! It feels like a water color painting. That's so cool!
So much to learn! The more I'm EXPOSED to the workings of photography, the more fun I'm having! I never dreamed that I would be considered as having "artistic" abilities.