Facial twitch: I believe these twitches are similar to the twitches people get in their eyelids. Usually it goes away within 6 weeks or so. There are other causes such as caffeine, stress, alcohol, electrolyte imbalances and excessive fatigue. Feel better.
A shutter speed of 1/30 for example will let in twice as much light as a speed of 1/60 since it is two times slower. When you decrease the shutter speed by a factor of two you are increasing the amount of light by one stop. Remember that fractions get larger as the number on the bottom gets smaller.
1. Set the camera's resolution to take high quality photos at the highest resolution possible. Low-resolution images are more difficult to alter later; it also means that you cannot crop as enthusiastically as you could with a higher-resolution version (and still end with something printable).alance in ISO, shutter speed, and aperture. ISO is how sensitive your camera is to light, shutter speed is how long it takes for your camera to take a picture (which in turn alters the amount of light coming in), and aperture is how dilated the lens of your camera is.