There are three interdependent variables in digital photography.



Digital photography consists of a proper balance between...

Shutter Speed

Aperture &

Film Speed

Throughout the pages of this site I talk about how these three interrelate. When you understand and find the correct balance your snapshots will transform into photographs.

Don’t concern yourself if you don’t understand this page right now. Read it and refer back to it periodically. After a time you will comprehend the information. It is important in the grand scheme of photography, but it is not important that you digest it all right now.

Do you remember that exposure is how much light reaches the photosensitive area of your camera? This is what determines how bright or dark your pictures will be.

Different subjects require different amounts of light to come in contact with the photosensitive surface. Too much exposure and the picture will be too bright; too little exposure and it will be too dark.

People think that shutter speed is what makes the difference in digital photography. It does, but, shutter speed is only one of three variables that change exposure (brightness). The settings you choose for shutter speed, aperture and film speed, all affect the exposure in digital photography.

This is important! You cannot merely use shutter speed changes and expect professional quality photography. The other settings are there for good reason. Learn to use them and you will be a much happier photographer for your effort.

The settings of these three decide... how dark or bright your pictures end up. The three must be balanced in order to have good photos. Let’s see if I can put it into words.

Large hose, high water pressure,(where water is the light entering your camera) and a wide open nozzle equals lots of water moving through the hose. Restrict any of the three and it takes longer for the water to move through the hose.

Shutter speed is like... an on/off valve that has only two settings. Either it’s on or it’s off. The speed at which it is switched on then off determines how long the water (light) runs through the hose. In essence how much light actually travels through can be restricted by the time duration of the shutter.

Aperture is the size of the hose.

A drinking straw size hose, good luck watering you lawn. But a hose the size of a fireman’s hose you will wash your lawn into the gutter. Different size fields require differing amounts of water to water them. So---- small aperture equal little light, large aperture equal lots of light.

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