Photography remains just that when you convert to digital cameras: you still have to know how to compose and shoot pictures to get the best results. The way you see your subject, and visualize the resulting image doesn't change in any basic way.
Are you looking to improve the overall contrast of your photos to bring out more fizz? Why not try the famous S-Curve adjustment technique? It's a simple, but very effective technique.
The aperture itself is the opening in the diaphragm that controls the amount
of light passing through the lens and onto the film or sensor. The size of the
aperture is referred to as the f-stop and it relates directly to the depth of
field, which is the distance between the nearest and farthest parts of a scene
that appear in focus, or the focal length divided by the diameter of the aperture.
You have all heard of white on white and it certainly has its place. But black on black has its moods, too. A low key photograph evokes mystery, night and secrets. Silhouette and shape prevail over color and light.
What does one need to do to get the perfect close-up of a wild flower? Set up a tripod, clip on camera, then snap, snap it's in the bag, camera, chip.. whatever? Maybe... but consider a few unexpected impediments first.