Camera terminology.

1. Depth of focus - When you look at a perfectly focused picture you will notice that parts of the photograph in front of and behind the subject will still be in sharp focus. Depth of focus relates to the difference between the very closed point and the furthest point from the camera that's in sharp focus. Depth of focus increases as you
1. Move away from your subject
2. reduce the aperture setting (i.e. increase the F-stop setting on a lens
3. Increase the angle of view on a zoom lens
4. you move away from your subject
2. Exposure latitude - This is the difference between the very darkest shadow and the brightest highlights in an image you are able to capture and yet still see detail without the image appearing a muddy black or completely white with no detail at all.
3. Mpixel -1000000 or a  Million pixels
4. Resolution
5. Fixed Focus lens
6. Interchangeable lenses - This is only an option when you buy an SLR camera in the main. Rather than being stuck with the lens which came with your camera you have the option to purchase a number of different lenses ranging from wide angle to extreme telephoto and from lighter cheaper lenses to higher quality and often heavier lenses which will give you decades of service
7. Wide angle, normal & telephoto lenses (also refereed to as angle of view) - If you think in terms of what you see with your eyes as the normal field of view then a wide angle lens will enable you to capture more of what you see, a telephoto lens by comparison enables you to focus on an area smaller than what you can see and magnify it. In 35mm film equivalents terms <24mm is classed as ultra wide angle, 24-35mm as wide angle, 38-60mm as standard, 60-135mm short telephoto, 135-300mm as telephoto and anything above 300mm as extreme telephoto
8. ISO - ASA- Film speed settings -
9. Manual exposure -