If you own a Digital SLR camera, but have yet to buy a lens besides the one that came with the camera, you are missing out. In this article and video, I will go over a few lenses that you might find interesting to get more fun and quality out of your DSLR. What photography basics do I need to know? Aperture: There is a number value that says how much light is let in through the camera lens (measured in “f-stops”), and how much of the picture will be sharply focused. Inside each lens there are diaphragm blades that control the size of the opening (the word Aperture means the opening). A lower number, say 1.4, allows more light in, but only a small part of the picture is focused. With a large aperture number, less light gets in, but the light rays are aligned straighter, allowing more of the image to look sharper. Depth of Field: This is a term that refers to how much of the picture is sharply focused. Having the whole image in focus is called deep focus, and having only a s...