Lines animates your photographs. It leads or guides you, suggests direction, movement, speed, depth, strength, threats, and of course, solitude, tranquility, calm, or restfulness. Moreover, it helps you achieve harmony, and balance if you know how to use them creatively.
Exposure is the understanding between the image seen by the human eye and the image seen by the camera. A perfectly exposed photograph will render the scene as you see with your naked eye. That means if your subject looks gray it should exactly render that gray in the captured image. But there is no such technology currently available that can reproduce the full range of tones that our eye can see; or is capable of capturing the full visible electromagnetic spectrum.
If you are digital shooter who use Adobe Camera Raw (ACR) or Adobe Photoshop Lightroom I’m sure you have encountered DNG. You may be wondering what actually is it?, or what is it used for?, or why in the world should I convert my original raw image to DNG developed by adobe where it has its own vendor specific raw format?