Aperture.

 These are the three images i have taken to show aperture within my photographs.The first image shows a completely clear bottle and a blurred out background, this would be used to focus in on something inparticular without the background being in focus. In the second image the bottle is still very much in focus although the background becomes more clearer as more light has been let in. In the last image, the whole of the image is extremely clear and you can see everything in great detail. Next time i would definitely change the background, as whilst taking the photo's i did not realise that there was someone in the background. Although this exaggerates the purpose of aperture even more as although he moves, it is definitely clearer to the eye. Aperture is shown in f.stops and the more light is let in the lower the number is. This also means that the shutter takes longer to close when you are trying to get a clearer shot.