Studio Time 06/11/10

Today we visited the colleges studio facility. We were shown some of  the equipment the college have in stock and Steve talked us through the camera operations . We talked about the three main settings of the camera, firstly the ISO setting which is set by the International Standards Organisation who rate the film speed used in a camera. The setting of  the ISO on the camera we used in this case a Canon 5D has a range from 50 to 3200, so is capable of reacting to very low light,  moon light or street lights to capture an image . The problems that will arise through using the higher rated speed, or fast film is that your image will not be as sharp as if you had chosen a lower rated or slower film setting .As the higher the ISO used the less light is required to process so your image , so will not be given the time to give a real sharp image and will show a noisy or grainy look to them.So using a low setting of 100 or 200 will always give a sharper image . We secondly talked about the stutter speed and as we were using as lamp with a flash built in we could only choose a speed of 1/200th of a second or slower as the camera had to be in time with the lamp giving of its flash of light. The lamp's flash was controlled by the camera via a cable joining the two.The shutter speed dictates the length of time the camera's digital sensor is exposed to the light it has to read. The higher speeds would be used to capture fast moving objects, for use in sport and in windy conditions as so not to produce a blurred image. Slower speeds will need to be used in low light condition for example indoors . Thirdly is the Aperture setting ,this is controlled by adjusting the 'f' stops of the camera's lens.By doing this you can dictates how large or small the hole, known as the aperture in the camera's lens, will allow the light to hit the sensor or film used in it. The higher the 'f' stop number used the larger aperture will be and the smaller the 'f' stop number used the larger the aperture will be .By using the higher 'f' stop your image will show focus in both the fore ground and background in your image used for example to landscape photography.When the lower 'f' stop number used this will show the image in the foreground in focus but the back ground will be a blur, good for use in  portraits so your subject is the main focal point for the viewer of your picture. The adjusting of the aperture will also dictate the speed of the shutter you will need to use. The small the aperture the the longer the shutter will need to be open to let enough light in to have the picture correctly exposed. Below shows a picture shot with a high shutter speed which you can see was able to catch the water in mid air.

Above shows another shot of water but this time with the shutter speed slowed down to give a sense of movement in the image.

Here we can a range of different 'f' stops , showing the apertures relating to them.The larger the aperture the smaller the number.

 

And lastly above shows an on line calculator which can be used to calculate the correct shutter speed and aperture to be used in different light conditions.This gives a range of light conditions to choose from.I will be posting some picture using this to web site to calculate all three setting to see if  accurate.

http://www.calculator.org/calculate-online/photography/exposure.aspx