Photography is an art, and not all of us take great photographs. Almost all digital cameras now come with an auto mode, which will set the Shutter speed, Aperture size to take better photographies by itself. But if you want to take the best Photo, you need to set them all in your own. If you master the manual mode, you can master photography.
But working in Manual mode is not easy for beginners, you need to know about some photography jargons like aperture, ISO, shutter speed etc. Try Googling and you’ll learn enough to give a brief lecture on this topic. But learning them theoretically doesn’t make you a great photographer, you should know to execute it.
But, how are you going to try those sitting in front of your computer screen ? Try this camera sim, which will let you experiment with a virtual camera. It provides three modes, Aperture priority, Shutter priority and Manual mode.
Shutter speed is how long the shutter needs to be open, allowing light into the camera, to properly expose the image. Fast shutter speeds allow you to “freeze” the action in a photo, but require lots of light. Slower shutter speeds allow for shooting with less light but can cause motion blur in the image.
Aperture, or f-stop, refers to how big the hole will be for the light to pass through when the shutter is open and the picture is snapped. Lower f numbers correspond with larger holes. The important thing to remember is this: the higher the f number, the more things in front of and behind the subject will be in focus, but the more light you will need. The lower the f number, the more things in front of and behind the subject will be out of focus, and the less light you will need.
After you get enough experience from simulation, go out and try with your own camera ! Nothing teaches you much like facing the world with a camera. Hope this helped you. Try it and share your experiences with us.