This is an excellent method of coming to an understanding of the f/stop function. It is a technique in which takes a subject and takes a number of pictures from the same viewpoint at differing levels of exposure. Half or one f/stop (+/-) differences are usually selected depending on the subject.
BMP
The bit-mapped file format used by Microsoft Windows. The BMP format supports RGB, indexed-color, grayscale, and Bitmap color modes.
Bitmap
A method of storing digital information that maps an image pixel out, bit by bit. The density of the pixels determines how sharp the image resolution will be. Most image files are bit mapped. This type of file gives you the 'jaggies,' stair-stepped edges that become apparent when you zoom in. Bitmap images are compatible with all types of computers. The desktop for all Windows machines uses .bmp files, while the Macintosh uses .pict files. Most Internet publishing and e-mail use JPEG or .JPG and .GIF (89a) formats. Canon PowerShot cameras store their pictures in JPEG format.
Bit
A bit, which stands for binary digit, is the smallest unit of digital information. Eight bits equals one byte. Digital images are often described by the number of bits used to represent each pixel. i.e. a 1-bit image is monochrome; an 8-bit image supports 256 colours or grayscales; while 24 or 32-bit supports true colour.
