Exercise: Measuring exposure

This exercise has been first real 'plunge' into the scary world of shooting in 'manual'. Previously I was always in the 'automatic' comfort zone and was happy to let the camera do all the hard work. Getting my head round the 'exposure' triangle is quite a leap and I'm not totally there yet. But the work here is helping, as it is enabling me to see what differences are made by each adjustment to the controls of film sensitivity, shutter speed and aperture size.

ISO 1600   f/5   1/80

This photograph is the darker end of a range of shots from  light to dark.

ISO 100   f/9   1/20

This view of a Victorian school's bell is darkened by the snowy weather conditions. The light is diffused  by the clouds at mid-day.

ISO 1250   f/36   1/80

Here is a narrow boat on the Grand Union canal. The photograph is overexposed by means of the ISO setting and the shutter speed.

ISO 100   f/16   1/50

This image of a footbridge is a shade darker than it was in reality, thanks to the aperture setting.

ISO 100   f/16   1/125

I think this close-up scene of foliage is darker than it actually was due to the shutter speed which wasn't open long enough to gather much light.

ISO 100   f/8   1/200

When I have absorbed the concept of the exposure triangle to a greater degree,  I shall be able to decide whether the image is particularly light as a result of the ISO  or the aperture setting. But for now I can only guess..

Here is the series of photographs that show images where the exposure has been deliberately altered from average to darker and lighter on either side of the central setting

1/250

1/320

1/400

1/500

1/640

1/800

1/8

1/10

1/13

1/15

1/20

1/25

1/60

1/80

1/100

1/123

1/160

1/200

1/25

1/100

1/125

1/160

1/200

1/250

2.0s

1.6s

1.3s

1.0s

0.8s

0.8

2.0s

1.0s

0.6s

0.6s

0.5s

0.4000s