Summer Workshops July 2010

Marcus Scott-Taggart Chairman: Surrey Photographic Association’s Judges’ & Lecturers’ Committee

 Exposure  getting all the detail you want in your photograph Correct Exposure

 Exposure  getting all the detail you want in your photograph Under Exposed

 Exposure  getting all the detail you want in your photograph Over Exposed

 Exposure  getting all the detail you want in your photograph  Getting the right exposure requires balancing three different factors  How sensitive to light the sensor in the camera is  How bright the light is that falls on the sensor  How long the light is allowed to fall on the sensor Sensor Performs the same function as film set it to fast or slow, equivalent of film speed

 Exposure  getting all the detail you want in your photograph  Getting the right exposure requires balancing three different factors  How sensitive to light the sensor in the camera is  How bright the light is that falls on the sensor  How long the light is allowed to fall on the sensor SensorAperture The Iris Diaphragm enables you to alter the amount of light than can pass through the lens

 Exposure  getting all the detail you want in your photograph  Getting the right exposure requires balancing three different factors  How sensitive to light the sensor in the camera is  How bright the light is that falls on the sensor  How long the light is allowed to fall on the sensor SensorApertureShutter Speed

A = Automatic Everything is decided by the camera P = Programmable Everything automatic except what you want to change M = Manual Everything has to be set by you A = Aperture priority. You set the aperture and the shutter speed is set automatically S (or T) = Shutter priority. You set the shutter speed and everything else is set automatically

Everything from foreground to background is sharp = very wide depth of field

Greater depth of field Narrower depth of field

Narrowing the depth of field completely changes the point of interest in the picture

Limiting the depth of field stops the background from interfering with the main subject

The closer the camera is to the subject the narrower is the depth of field

 Speeds can be as fast as 1/4000 th of a second  Speeds can be as slow as 15 seconds or longer  1 step on a fixed speed scale has the same effect on the exposure as 1 step on the f/no. scale  1 step faster at a wider aperture is the same as 1 step slower at a narrower aperture  1/125 th of a second at f/8 is the same as:  1/60 th second at f/11 is the same as:  1/250 th of a second at f/5.6